TECHNICAL COMMITTEE ON HEAT RECOVERY ... - NFPA

TECHNICAL COMMITTEE ON HEAT RECOVERY STEAM GENERATORS

NFPA 85 Second Draft Meeting Agenda

January 25, 2018 8:00 AM – 5:00 PM CT Entergy Corporation, 639 Loyola Avenue, New Orleans, LA

1. Call to Order. Dwight Hyche, Chair

2. Introductions.

3. Approval of Meeting Minutes from February 9, 2017. (Attachment A)

4. Staff Updates. Laura Moreno, NFPA Staff

• Committee membership update. (Attachment B)

• Fall 2018 revision cycle schedule. (Attachment C)

• Overview of NFPA Process

5. Review of Public Comments: NFPA 85 Chapter 8. (Attachment D)

6. Review of Committee Inputs. (Attachment E)

7. Review of Correlating Committee Notes. (Attachment F)

8. Review of Fundamentals Technical Committee actions. (Attachment G)

9. Task Group Reports.

• Review of Overpressure Protection Requirements (First Revision 155 and Committee Input 220): Karen Whitehead and Jimmie Schexnayder

10. Old Business.

• Requirements for detecting and responding to fin metal tube fires (section 8.5.5).

11. New Business.

12. Next Meeting.

13. Adjourn.

NFPA 85 (BCS-HRS) Second Draft Technical Committee Meeting Agenda January 25, 2018 - New Orleans, LA

of 76

Attachment A: Previous Meeting Minutes


of 76

TECHNICAL COMMITTEE ON

HEAT RECOVERY STEAM GENERATORS NFPA 85

First Draft Meeting Minutes February 9, 2017 8:00 AM - 5:00 PM MT

Embassy Suites by Hilton Phoenix-Tempe, Tempe, AZ

Attendees

Committee Members:

Dwight Hyche, Chair Swiss Re America Holding Corporation, MS

David Dexter* The Dow Chemical Company, LA

Fedja Drndarevic Technical Standards and Safety Authority, Canada

Dale Evely Southern Company Services, Inc., AL

Martin Fry Coen Company, Inc., CA

Steven Graf Emerson Automation Solutions, PA

David Hinshaw Dynegy, Inc., NY

David King American Electric Power Company, Inc., OH

Randy Kleen General Electric Company, TX

David Leeper Burns & McDonnell, MO

Mark Loomer* AECOM, NJ

Steven Meierotto Nooter Eriksen, MO

Windy Muehleisen Forney Corporation, TX

Alan Robertson Sargent & Lundy, LLC, IL


of 76

Jimmie Schexnayder Entergy Corporation, LA

Ilya Yarinovsky* Bechtel Corporation, MD

Donald Bairley* General Electric, CT

Jennifer Beckmann Nooter Eriksen, MO

Harrison Manning* Southern Company Services, Inc., AL

Roy Reeves Emerson Automation Solutions

Karen Whitehead Black & Veach Corporation, KS

Laura Moreno, Staff Liaison National Fire Protection Association, MA

Guests

Marc Cropp Southern Company Services, Inc.

Joseph Fehr Sega Inc.

Joseph Bittinger American Electric Power

Nando Nunziante Zeeco

William Rucki Fives North American Combustion

*Participated by phone

1. Call to Order. Dwight Hyche, Chair, called the meeting to order at 8:00 AM and welcomed the attendees to the meeting.

2. Introductions. Attendees introduced themselves and identified their affiliation.

3. Approval of Minutes. The minutes from August 10, 2016 were approved without revision.

4. Staff Updates. Laura Moreno provided an overview of the Fall 2018 revision cycle schedule and the NFPA process. (attached)

5. Review of Public Inputs: NFPA 85 Chapter 8. The Technical Committee reviewed Public Inputs and developed First Revisions as necessary. Dwight Hyche, Chair, pointed out that if


of 76

the chair submitted Public Input they are not supposed to chair the meeting while their Public Inputs are presented, but the Technical Committee agreed to waive that for this meeting since the Public Inputs submitted by the chair on behalf of the committee were agreed upon at the pre-First Draft meeting last year.

6. Review of Fundamentals Technical Committee actions. The Technical Committee reviewed several items that were flagged by the Fundamentals Technical Committee for their review and created First Revisions and Committee Inputs as necessary.

Karen Whitehead and Jimmie Schexnayder were tasked with reviewing Committee Input 220 and First Revision 155, which would remove overpressure protection requirements from 8.4.3.2.2.1 in favor of those added to Chapter 4.

The committee members agreed in principle with the text in Committee Input 154 for determining the autoignition temperature of fired fuels, but recommended specifying it is the owner, rather than the owner or fuel provider, who should specify the AIT. Steve Meierotto was tasked with submitting the revised text as a Public Comment.

The Technical Committee reviewed First Revision 112, which deletes the definition of combustion turbine normal shutdown from Chapter 3. This definition is necessary as the term is used within the Chapter 8 purge credit requirements and there needs to be a delineation between a turbine shutdown and a boiler shutdown. The existing definition needs to be retained. The need to retain this definition should be brought to the attention of the Fundamentals Technical Committee and Correlating Committee.

7. Task Group Reports.

Purging of HRSG/Bypass Stack. Steve Meierotto (chair), Don Bairley, and Randy Kleen. Steve had submitted language to the Fundamentals Technical Committee before their January meeting to clarify autoignition temperature requirements, which resulted in Committee Input 154. See additional notes in Item 5.

8. New Business. The committee briefly discussed, at Dale Evely’s request, requirements for detecting and responding to fin metal tube fires in section 8.5.5. Operators are looking for guidance in complying with these sections and the belief on the part of the HRSG providers seems to be that this type of fire is highly unlikely. Committee members were asked to consider this for further discussion during the Second Draft meeting.

9. Next Meeting. The Technical Committee agreed to hold the Second Draft meeting on January 25, 2018 in Phoenix, AZ or New Orleans, LA, in conjunction with the Technical Committee on Multiple Burner Boilers.

10. Adjournment. The meeting was adjourned at 3:10 PM.


of 76

3/16/2017

1

NFPA First Draft MeetingTechnical Committee on Heat Recovery Steam GeneratorsPhoenix, AZ

February 9, 2017 | Staff liaison: Laura Moreno | Chair: Dwight Hyche

NFPA First Draft Meeting

nfpa.org 2

At this and all NFPA committee meetings we are concerned with your safety.

If the fire alarm sounds, please proceed to an exit.


• Members, please verify/update your contact information

• Use of audio recorders or other means capable of reproducing verbatim transcriptions of this or any NFPA meeting is not permitted

nfpa.org 3

Members


• All guests are required to sign in and identify their affiliations.

• Participation is limited to TC members or those individuals who have previously requested time to address the committee. Other participation is granted at the discretion of the Chair.

• Guest chairs are located around the room as a courtesy.

nfpa.org 4

Guests

Enforcers 5% Members: 1

Insurers 5% Members: 1

Installer/Maintainer 0%Members: 0

Labor 0% Members: 0

Manufacturers 30% Members: 6

Research & Testing 0% Members: 0

Special Experts 30% Members: 6

Users 30% Members: 6

Consumer 0%Members: 0 5

Technical Committee on Heat Recovery Steam Generators

20 Voting members26 Total committee members

6 Principals with alternates

Alternates can apply at www.nfpa.org/85

NFPA First Draft Meeting• Public Input Stage (First Draft):

First Draft Meeting: TODAY Posting of First Draft for Balloting Date: 4/27/17 Posting of First Draft for Public Comment: 9/7/17

• Comment Stage (Second Draft): Public Comment Closing Date: 11/16/17 Second Draft Meeting Period: 11/16/17 - 2/8/18 Posting of Second Draft for Balloting Date: 3/22/18 Posting of Second Draft for NITMAM: 8/2/18

• Tech Session Preparation: NITMAM Closing Date: 8/30/18 NITMAM /CAM Posting Date: 10/11/18 NFPA Annual Meeting: June 2019

• Standards Council Issuance: Issuance of Consent Documents: 11/5/18 Issuance of Documents with CAM: August 2019

nfpa.org 6


of 76

3/16/2017

2


Members categorized in ANY interest category who have been retained to represent the interests of ANOTHER interest category (with respect to a specific issue or issues that are to be addressed by a TC) shall declare those interests to the committee and refrain from voting on any Public Input, Comment, or other matter relating to those issues throughout the process.

nfpa.org 7


• Only principals can vote. – alternate may vote if the principal is not present

• All Principals encouraged to have an alternate.

• Voting during meeting is used to establish a sense of agreement on first revisions (simple majority).

nfpa.org 8

Voting at First Draft Meeting


• Follow Robert’s Rules of Order.

• Discussion requires a motion.

nfpa.org 9

General Procedures


• Member addresses the chair.

• Receives recognition from the chair.

• Introduces the motion.

• Another member seconds the motion.

nfpa.org 10

Committee member actions:


• States the motion.

• Calls for discussion.

• Ensures all issues have been heard.

• Takes the vote.

• Announces the result of the vote.

nfpa.org 11

Committee chair actions:


• Resolve Public Input

• Create a First Revision

• Create a Committee Input (Trial Balloon)

nfpa.org 12

Committee Actions and Motions:


of 76

3/16/2017

3


• Committee develops a Committee Statement (CS) to respond (resolve) a Public Input.

• Committee must clearly indicate reasons for not accepting the recommendation in CS and/or point to a relevant First Revision

• PI does not get balloted

nfpa.org 13

Resolve a Public Input (PI)


• Committee wants to make a change to a current section or add new text.

• Committee develops a Committee Statement (CS) substantiating the change. (do not refer to PI as the reason)

• Ensure any associated PIs get a committee response, often simply referring to the relevant FR.

• Each FR gets balloted

nfpa.org 14

Create a First Revision (FR)


• Committee wants to receive Public Comment on a topic, but not ready to incorporate it into the draft

• Need to have a Committee Statement

• Does not get balloted

nfpa.org 15

Create a Committee Input (Trial Balloon)


• All Public Input must have a Committee Statement

• Must include a valid technical reason

• No vague references to “intent”

• Explain how the submitter’s substantiation is inadequate

nfpa.org 16

Committee Statements (Substantiation):


• Not in order when another has the floor• Requires a second• This motion is not debatable and DOES NOT

automatically stop debate• A 2/3 affirmative vote will immediately close debate and

return to the original motion on the floor. Less than 2/3 will allow debate to continue.

nfpa.org 17

Motions for Ending Debate Previous Question or “Call the Question”

Using Adobe Connect

nfpa.org 18


of 76

3/16/2017

4


• Voting during meeting is used to establish a sense of agreement (simple majority)

• Secured by letter ballot (2/3 agreement)

• Only the results of the formal ballot determine the official position of the committee on the First Draft

nfpa.org 19

Formal Voting


• Initial ballot

• Circulation of negatives and comments

• First Revision that fails letter ballot becomes Committee Input (CI) – just like the trial balloon version of CI – so as to solicit Public Comment

nfpa.org 20

Balloting


• First Revisions (FR) ONLY Public Inputs and Committee Statements not balloted Reference materials are available -

• First Draft, PI, CI, CS, etc• Allowed vote:

Affirmative on all FR Affirmative on all FR with exceptions specifically noted

• Ballot form provides a column for affirmative with comment Note: This box only needs to be checked if there is an accompanying

comment.• Reject or abstain requires a reason.

nfpa.org 21

Ballots


• Ballots will be an online format

• Alternates are strongly encouraged to return ballots

• Ballot session will time out after 90 minutes

• Use “submit” to save your work

nfpa.org 22

Electronic Balloting


nfpa.org 23

• Click link on the ballot email received• Sign in with NFPA.org Committee Login and Password


nfpa.org 24

• Select either Affirmative on All or Affirmative with Exception(s)


of 76

3/16/2017

5


nfpa.org 25

• Use “See FR- #” link to review all First Revisions

• Use “Edit election” to change individual votes or to modify vote after submitting ballot.


nfpa.org 26

• Make selection: Affirmative with Comment, Negative, or Abstain

• No selection made-defaults to affirmative

• Must include comment on each vote.


nfpa.org 27

• To complete ballot click Participant Consent and Submit• Return and edit any votes before ballot due date.

Legal

• It is the policy of the NFPA to strictly comply with state and federal antitrust laws.

• NFPA expects all participants in its standards development activities to conduct themselves in strict accordance with these laws.

• It is the obligation of each participant to read and understand NFPA’s Antitrust Policy. (You can access this policy at nfpa.org/regs.)

nfpa.org 28

Antitrust Matters

Legal

• Participants must avoid any conduct, conversation or agreement that would constitute an unreasonable restraint of trade.

• Conversation topics that are off limits include: Profit, margin, or cost data; Prices, rates, or fees; Selection, division or allocation of sales territories, markets or

customers; Refusal to deal with a specific business entity.

nfpa.org 29

Antitrust Matters (cont’d)

Legal

• NFPA’s standards development activities are based on openness, honesty, fairness and balance.

• Participants must adhere to the Regulations Governing the Development of NFPA Standards and the Guide for the Conduct of Participants in the NFPA Standards Development Process. (You can access the Regulations and Guide at nfpa.org/regs.)

• Follow guidance and direction from your employer or other organization you may represent.

• Be sure to ask questions if you have them.

nfpa.org 30



of 76

3/16/2017

6

Legal

• Manner is which standards development activity is conducted can be important.

• The Guide of Conduct requires standards development activity to be conducted with openness, honesty and in good faith.

• Participants are not entitled to speak on behalf of NFPA.• Participants must take appropriate steps to ensure their

statements whether written or oral and regardless of the setting, are portrayed as personal opinions, not the position of NFPA.

• Be sure to ask questions if you have them.

nfpa.org 31


Legal

• Disclosures of essential patent claims should be made by the patent holder.

• Patent disclosures should be made early in the process.• Others may also notify NFPA if they believe that a proposed or

existing NFPA standard includes an essential patent claim.• NFPA has adopted and follows ANSI’s Patent Policy. • It is the obligation of each participant to read and understand

NFPA’s Patent Policy. (You can access this policy at nfpa.org/regs.)

nfpa.org 32

Patents

TC Struggles with an Issue

• TC needs data on a new technology or emerging issue

• Two opposing views on an issue with no real data

• Data presented is not trusted by committee

Research Fund Lends a Hand

• TC rep and/or staff liaison submits a Research Fund Request

• Requests are reviewed by a Panel and chosen based on need / feasibility

Research Project Carried Out

• Funding for project is provided by the Research Fund and/or industry sponsors

• Project is completed and data is available to TC

http://www.nfpa.org/news-and-research/resources/fire-protection-research-foundation/nfpa-research-fund

Document Information PagesAbout

• Document scope• Table of contents• Articles• Research and

statistical reports• Latest codes and

standards news on NFPA Today blog feed

• Free access

Current and Previous Editions

• Issued TIAs, FIs, Errata

• Archived revision information such as meeting and ballot information, First Draft Reports (previously ROPs), Second Draft Reports (previously ROCs), and Standards Council and NITMAM information

Next Edition

• Revision cycle schedule

• Posting & closing dates

• Submit public input/comments via electronic submission system.

• Meeting and ballot information

• First Draft Report and Second Draft Report

• NITMAM information• Standard Council

Decisions• Private TC info (*red

asterisk)• Ballot circulations,

informational ballots and other committee info

Technical Committee

• Committee name and staff liaison

• Committee scope and responsibility

• Committee list with private information

• Committee documents (codes & standards) in PDF format

• Committees seeking members

• Online committee membership application

Thank You


of 76

Attachment B: Technical Committee Roster


of 76

Address List No PhoneHeat Recovery Steam Generators BCS-HRSBoiler Combustion System Hazards

Laura E. Moreno12/18/2017

BCS-HRSDwight G. HycheChairSwiss Re America Holding Corporation1105 46th Street Meridian, MS 39305-2749

I 3/1/2011BCS-HRS

John BurneyPrincipalProgress Energy299 1st Avenue North, PEF 902St. Petersburg , FL 33701

U 10/18/2011

BCS-HRSDavid Paul CannonPrincipalHurst Technologies13514 Lakeside TerraceHouston, TX 77044

SE 1/17/1997BCS-HRS

David E. DexterPrincipalThe Dow Chemical CompanyPO Box 50Hahnville, LA 70057

U 8/9/2011

BCS-HRSFedja DrndarevicPrincipalTechnical Standards and Safety Authority345 Carlingview DriveToronto, ON M9W 6N9 Canada

E 10/18/2011BCS-HRS

Dale P. EvelyPrincipalSouthern Company Services, Inc.42 Inverness Center Parkway(Bin B463)Birmingham, AL 35242-4809Alternate: Harrison B. Manning

U 10/10/1998

BCS-HRSJoseph E. FehrPrincipalPower Engineers, Inc.16041 FosterPO Box 1000Overland Park, KS 66085

SE 04/04/2017BCS-HRS

Martin FryPrincipalCoen Company, Inc.951 Mariners Island Blvd., Suite 410San Mateo, CA 94404

M 11/2/2006

BCS-HRSSteven V. GrafPrincipalEmerson Automation SolutionsPower & Water Solutions200 Beta DrivePittsburgh, PA 15238-2918Alternate: Michael R. Bischof

M 8/5/2009BCS-HRS

David J. HinshawPrincipalDynegy, Inc.Independence Station76 Independence WayOswego, NY 13126

U 1/10/2008

BCS-HRSMarc L. HunterPrincipalRockwell AutomationGlobal Process Consultant180 Harvester DriveBurr Ridge, IL 60527

M 04/04/2017BCS-HRS

David W. KingPrincipalAmerican Electric Power Company, Inc.1 Riverside Plaza Columbus, OH 43215

U 08/09/2012

BCS-HRSRandy J. KleenPrincipalGeneral Electric CompanyGE Power16415 Jacintoport BoulevardHouston, TX 77015-6589Alternate: Donald W. Bairley

M 7/26/2007BCS-HRS

David LeeperPrincipalBurns & McDonnell9400 Ward ParkwayPO Box 419173Kansas City, MO 64141-6173

SE 08/17/2015

1NFPA 85 (BCS-HRS) Second Draft Technical Committee Meeting Agenda January 25, 2018 - New Orleans, LA

of 76

Address List No PhoneHeat Recovery Steam Generators BCS-HRSBoiler Combustion System Hazards

Laura E. Moreno12/18/2017

BCS-HRSMark S. LoomerPrincipalAECOM510 Carnegie CenterPrinceton, NJ 08540-6241


Windy M. MuehleisenPrincipalForney Corporation16479 N. Dallas Parkway, Suite 600Addison, TX 75001

M 03/07/2013

BCS-HRSAlan R. RobertsonPrincipalSelf Employed615 Belleforte AvenueOak Park, IL 60302


Jimmie J. SchexnayderPrincipalEntergy Corporation1213 West 4th StreetKaplan, LA 70548Alternate: Ronald Rispoli

U 7/19/2002

BCS-HRSJames P. WalawenderPrincipalBlack & Veatch Corporation11401 Lamar AvenueOverland Park, KS 66211-1508Alternate: Karen Whitehead

SE 10/3/2002BCS-HRS

Ilya YarinovskyPrincipalBechtel Corporation5275 Westview DriveFrederick, MD 21703

SE 10/28/2008

BCS-HRSJennifer A. BeckmannVoting AlternateNooter Eriksen1509 Ocello DriveFenton, MO 63026-2406

M 08/17/2015BCS-HRS

Humberto GonzalezVoting AlternateSiemens Energy Inc.4400 North Alafaya TrailMC Q2-286Orlando, FL 32826

M 08/11/2014

BCS-HRSDonald W. BairleyAlternateGeneral Electric175 Addison RoadPO Box 500Windsor, CT 06095Principal: Randy J. Kleen

M 1/1/1995BCS-HRS

Michael R. BischofAlternateEmerson Automation Solutions200 Beta DrivePittsburgh, PA 15238Principal: Steven V. Graf

M 08/17/2017

BCS-HRSHarrison B. ManningAlternateSouthern Company Services, Inc.42 Inverness Center Parkway(Bin B463)Birmingham, AL 35242Principal: Dale P. Evely

U 10/23/2013BCS-HRS

Ronald RispoliAlternateEntergy Corporation2414 West 5th StreetRussellville, AR 72801-5541Principal: Jimmie J. Schexnayder

U 10/23/2003

BCS-HRSKaren WhiteheadAlternateBlack & Veatch Corporation11401 Lamar AvenueOverland Park, KS 66211Principal: James P. Walawender


Laura E. MorenoStaff LiaisonNational Fire Protection Association1 Batterymarch ParkQuincy, MA 02169-7471

1/6/2015

2NFPA 85 (BCS-HRS) Second Draft Technical Committee Meeting Agenda January 25, 2018 - New Orleans, LA

of 76

Attachment C: F2018 Revision Cycle Schedule


of 76

12/18/2017 NFPA

1/1

Fall 2018 Revision Cycle

Process Stage Process Step Dates for TCDates for TC

with CC

Public InputStage (First Draft)

Public Input Closing Date* 1/05/2017 1/05/2017

Final Date for TC First Draft Meeting 6/15/2017 3/16/2017

Posting of First Draft and TC Ballot 8/03/2017 4/27/2017

Final date for Receipt of TC First Draft ballot 8/24/2017 5/18/2017

Final date for Receipt of TC First Draft ballot ‐ recirc 8/31/2017 5/25/2017

Posting of First Draft for CC Meeting 6/01/2017

Final date for CC First Draft Meeting 7/13/2017

Posting of First Draft and CC Ballot 8/03/2017

Final date for Receipt of CC First Draft ballot 8/24/2017

Final date for Receipt of CC First Draft ballot ‐ recirc 8/31/2017

Post First Draft Report for Public Comment 9/07/2017 9/07/2017

Comment Stage(Second Draft)

Public Comment Closing Date* 11/16/2017 11/16/2017

Notice Published on Consent Standards (Standards that received no Comments) Note: Date varies and determined via TC ballot.

Appeal Closing Date for Consent Standards (Standards that received no Comments)

Final date for TC Second Draft Meeting 5/17/2018 2/08/2018

Posting of Second Draft and TC Ballot 6/28/2018 3/22/2018

Final date for Receipt of TC Second Draft ballot 7/19/2018 4/12/2018

Final date for receipt of TC Second Draft ballot ‐ recirc 7/26/2018 4/19/2018

Posting of Second Draft for CC Meeting 4/26/2018

Final date for CC Second Draft Meeting 6/07/2018

Posting of Second Draft for CC Ballot 6/28/2018

Final date for Receipt of CC Second Draft ballot 7/19/2018

Final date for Receipt of CC Second Draft ballot ‐ recirc 7/26/2018

Post Second Draft Report for NITMAM Review 8/02/2018 8/02/2018

Tech SessionPreparation (&

Issuance)

Notice of Intent to Make a Motion (NITMAM) Closing Date 8/30/2018 8/30/2018

Posting of Certified Amending Motions (CAMs) and Consent Standards 10/11/2018 10/11/2018

Appeal Closing Date for Consent Standards 10/26/2018 10/26/2018

SC Issuance Date for Consent Standards 11/05/2018 11/05/2018

Tech Session Association Meeting for Standards with CAMs 6/20/2019 6/20/2019

Appeals andIssuance

Appeal Closing Date for Standards with CAMs 7/10/2019 7/10/2019

SC Issuance Date for Standards with CAMs 8/07/2019 8/07/2019

TC = Technical Committee or Panel CC = Correlating Committee

As of 1/27/2017

More NFPA.org


of 76

http://www.nfpa.org/

Attachment D: NFPA 85 (BCS-HRS) Public Comment Report


of 76

12/18/2017 National Fire Protection Association Report

http://submittals.nfpa.org/TerraViewWeb/ViewerPage.jsp?id=85-2015.ditamap&toc=false&draft=true 11/54

Public Comment No. 27-NFPA 85-2017 [ Section No. 8.4.2 ]

8.4.2 Combustion Turbine.

8.4.2.1* Fuel Supply.

8.4.2.1.1 Liquid Fuels.

8.4.2.1.1.1

Two safety shutoff valves in series, with proof of closure, shall be provided in each fuel line tothe combustion turbine. Means shall be provided to prevent or relieve excess pressurebetween the two valves (double block and drain).

8.4.2.1.1.2

Three safety shutoff valves in series, with proof of closure, shall be provided in each fuel line tothe combustion turbine for units with combustion turbine purge credit provisions in accordancewith 8.8.4.7. Means shall be provided to prevent or relieve excess pressure between thesevalves (triple block and double drain).

8.4.2.1.2 Gaseous Fuels.

8.4.2.1.2.1

Two safety shutoff valves in series, with proof of closure, shall be provided in the line to thecombustion turbine. An automatic vent valve shall be provided between the two valves (doubleblock and vent).

8.4.2.1.2.2

Three safety shutoff valves in series, with proof of closure, shall be provided in each fuel line tothe combustion turbine for units with combustion turbine purge credit provisions in accordancewith 8.8.4.6. Automatic vent valves shall be provided between these valves (triple block anddouble vent).

8.4.2.2* Interlocks.

8.4.2.2.1

The HRSG system’s required permissives shall prevent starting of the combustion turbineunless the HRSG starting conditions are satisfied, which shall include but not be limited to thefollowing:

(1) The water levels in drum(s), if provided, are within the defined start-up range.

(2) The feedwater supply system is available to respond to demand.

(3) The pressure in steam or water spaces is not high.

(4) The exit temperature of duct burner(s), if provided, is not high.

(5) The position of stack closure, if provided, is correct.

(6) The pressure in the HRSG enclosure is not high.

(7) Where a combustion turbine purge credit is being used, all fuel systems connected to theHRSG are satisfactorily isolated.


of 76



8.4.2.2.2

The following combustion turbine interlocks shall be provided when fuel gas is being burned:

(1) Failure of the fuel gas vent valve required in 8.4.2.1.2.2 to be proved open during thecombustion turbine purge shall cause the purge and light-off sequence to be terminated.

(2) During combustion turbine light-off as described in 8.8.4, fuel gas pressure downstream ofthe fuel gas flow control valve or fuel gas flow to the turbine shall be monitored and shallcause the light-off attempt to be terminated and shall cause purge credit to be lost if themaximum allowable value as determined by the combustion turbine manufacturer isexceeded.

8.4.2.2.3* Signals shall be provided to the combustion turbine control system to initiate a change in thecombustion turbine operating mode if HRSG conditions deviate beyond preset safety limits,including but not limited to those listed in Table 8.4.2.2.3.

Table 8.4.2.2.3 HRSG Interlock Conditions and Responses

Condition ResponseWater in drum(s) below minimumpermitted level

Reduce combustion turbine load or trip combustionturbine as required by HRSG manufacturer.*

Pressure in combustion turbine exhaustplenum high Trip combustion turbine.

Position of stack closure (if provided) notcorrect (See 8.9.5.1.2 and 8.9.5.1.3.)

Reduce combustion turbine load , initiate acombustion turbine normal shutdown, or trip.

*Due to rapid steam pressure rise following a steam turbine trip, drum water level drops butinventory remains the same. A combustion turbine response to this transient should not berequired, and a delay for the time required immediately after the steam turbine trip to permitpressure recovery and level restoration should be permitted.

8.4.2.2.4

Where a HRSG is not provided, a permissive shall prohibit starting the combustion turbine ifthe combustion turbine exhaust system pressure is high.

8.4.2.3 Operating Interfaces.

8.4.2.3.1

Combustion turbine loading and low-load hold/soak periods shall be established based on thefollowing HRSG parameters:

(1) Tube and drum metal temperatures

(2) Differential metal temperatures within a particular component (e.g., steam drum)

(3) Rate of change of critical temperatures

(4) Drum water level

8.4.2.3.2

The control system or the operator shall trip the combustion turbine in the case of anemergency that would lead to a safety hazard or catastrophic failure after the actions in8.4.2.2.3 have been accomplished.

Additional Proposed Changes

File Name Description ApprovedCCN_6.pdf 85_CN6

Statement of Problem and Substantiation for Public Comment


of 76



NOTE: The Public Comment appeared as CC Note No. 6 in the First Draft Report. The HRS Committee is encouraged to communicate with the NFPA 37 Technical Committee to ensure that NFPA 85 requirements for combustion turbines are not in conflict with NFPA 37 requirements and are being referenced as appropriate within NFPA 37.

Related ItemCorrelating Committee Note 6

Submitter Information Verification

Submitter FullName: CC ON BCS-AAC

Organization: Correlating Committee on Boiler Combustion SystemHazards

Street Address:City:State:Zip:Submittal Date: Wed Nov 08 14:21:49 EST 2017


of 76

Correlating Committee Note No. 6-NFPA 85-2017 [ Section No. 8.4.2 ]


Submitter Full Name: Laura MorenoOrganization: National Fire Protection AssocStreet Address:City:State:Zip:Submittal Date: Wed Jun 21 13:24:46 EDT 2017

Committee Statement and Meeting Notes

CommitteeStatement:

The HRS Committee is encouraged to communicate with the NFPA 37 Technical Committee to ensurethat NFPA 85 requirements for combustion turbines are not in conflict with NFPA 37 requirements andare being referenced as appropriate within NFPA 37.

Ballot Results

This item has passed ballot

20 Eligible Voters3 Not Returned

17 Affirmative All0 Affirmative with Comments0 Negative with Comments0 Abstention

Not Returned

Basile, Barry J.

Dexter, David E.

Schexnayder, Jimmie J.

Affirmative All

Buckingham, Fred P.

Cannon, David Paul

Chappell, Timothy

Evely, Dale P.

Fleming, Ronald J.

Franks, James E.

King, David W.

Kinoshita, Masaaki

Lance, Gail J.

Mason, Dennis P.

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/FormLaunch?id=/TerraView/C...

1 of 2 11/8/2017, 9:59 AM


of 76

May, Daniel R.

Schmidt, Celso G.

Steen, Lloyd E.

Voss, Justin D.

Wolff, Marc A.

Wong, Henry K.

Yates, Harold R.


2 of 2 11/8/2017, 9:59 AM


of 76



Public Comment No. 31-NFPA 85-2017 [ Section No. 8.4.3.2.2.3 ]

8.4.3.2.2.3 Triple Block and Double Vent Valve Arrangement.

Three safety shutoff valves in series, with proof of closure, shall be provided in the fuel line tothe duct burner for units with combustion turbine purge credit provisions in accordance with8.8.4.6. An automatic vent valve shall be provided between each of these valves.




NOTE: This Public Comment appeared as CC Note No. 8 in the First Draft Report. The HRS Committee should consider adding the language shown in brackets below, to clarify that this section applies to both the igniter and the main fuel lines and to correlate with 8.4.2.1.1.2 and 8.4.2.1.2.2: 8.4.3.2.2.3 Triple Block and Double Vent Valve Arrangement. Three safety shutoff valves in series, with proof of closure, shall be provided in [each] fuel line to the duct burner for units with combustion turbine purge credit provisions in accordance with 8.8.4.6. An automatic vent valve shall be provided between each of these valves.







of 76

Correlating Committee Note No. 8-NFPA 85-2017 [ Section No. 8.4.3.2.2.3 ]




CommitteeStatement:

The HRS Committee should consider adding the language shown in brackets below, to clarify that thissection applies to both the igniter and the main fuel lines and to correlate with 8.4.2.1.1.2 and8.4.2.1.2.2:

8.4.3.2.2.3 Triple Block and Double Vent Valve Arrangement.

Three safety shutoff valves in series, with proof of closure, shall be provided in [each] fuel line to theduct burner for units with combustion turbine purge credit provisions in accordance with 8.8.4.6. Anautomatic vent valve shall be provided between each of these valves.

Ballot Results




Not Returned

Basile, Barry J.

Dexter, David E.


Affirmative All

Buckingham, Fred P.

Cannon, David Paul

Chappell, Timothy

Evely, Dale P.

Fleming, Ronald J.

Franks, James E.


1 of 2 11/8/2017, 9:59 AM


of 76

King, David W.

Kinoshita, Masaaki

Lance, Gail J.

Mason, Dennis P.

May, Daniel R.

Schmidt, Celso G.

Steen, Lloyd E.

Voss, Justin D.

Wolff, Marc A.

Wong, Henry K.

Yates, Harold R.


2 of 2 11/8/2017, 9:59 AM


of 76



Public Comment No. 29-NFPA 85-2017 [ Section No. 8.7.4.3 ]

8.7.4.3 Duct Burner Master Fuel Trip.

For an operating duct burner, including the start-up or shutdown sequences, a duct burnermaster fuel trip shall be initiated by the following conditions:

(1) Low fuel pressure

(2) Combustion turbine exhaust or fresh air (if provided) flow across the duct burner thatdrops below the minimum required for operation of the duct burner as specified by theburner manufacturer or as proven by trial; it is permitted to infer this flow from theoperating status of the combustion turbine, fresh air fan (if provided), and damper(s) (ifprovided) position(s)

(3) Combustion turbine trip except for systems operating as defined in 8.10.2.4

(4) Loss of all burner flame other than during a normal duct burner shutdown sequence

(5) Partial loss of flame determined to create a hazardous accumulation of unburned fuel atany burner element or zone

(6) Loss of duct burner element(s) resulting in incorrect element firing configuration, inaccordance with 8.8.5.8.3.2

(7) Light-off failure of first burner in multiple burner operation

(8) Failure to prove a safety shutoff valve closed on command to close

(9) Closing of last individual burner safety shutoff valve other than during a normal ductburner shutdown sequence

(10) High fuel pressure

(11) Low water level on high pressure section of HRSG

(12) Loss of energy supply for HRSG control, burner management, or trips and associateddevices

(13) Low atomizing media (if provided) supply pressure

(14) Detection of burner management system malfunction

(15) Manual trip [See 4.11.7(8).]

(16) Loss of augmented air supply where the operation of the duct burner requires augmentedair.

(17) Fresh air (if provided) transfer failure (See 8.10.2.4.)

(18) Logic controller failure [See 4.11.7(10) and 4.11.7(11).]




NOTE: This Public Comment appeared as CC Note No. 7 in the First Draft Report. In subparagraph (12), the HRS committee should reconsider the wording "trips and associated devices" because the associated devices are already covered in the HRSG control and burner


of 76



management systems. The word "system" was appropriate for HRSG control and burner management, and should be reinstated. See the First Revision on 6.6.5.2.5.3 for a similar change.







of 76

Correlating Committee Note No. 7-NFPA 85-2017 [ Section No. 8.7.4.3 ]




CommitteeStatement:

In subparagraph (12), the HRS committee should reconsider the wording "trips and associated devices"because the associated devices are already covered in the HRSG control and burner managementsystems. The word "system" was appropriate for HRSG control and burner management, and should bereinstated. See the First Revision on 6.6.5.2.5.3 for a similar change.

Ballot Results




Not Returned

Basile, Barry J.

Dexter, David E.


Affirmative All

Buckingham, Fred P.

Cannon, David Paul

Chappell, Timothy

Evely, Dale P.

Fleming, Ronald J.

Franks, James E.

King, David W.

Kinoshita, Masaaki

Lance, Gail J.


1 of 2 11/8/2017, 10:00 AM


of 76

Mason, Dennis P.

May, Daniel R.

Schmidt, Celso G.

Steen, Lloyd E.

Voss, Justin D.

Wolff, Marc A.

Wong, Henry K.

Yates, Harold R.


2 of 2 11/8/2017, 10:00 AM


of 76



Public Comment No. 1-NFPA 85-2017 [ Section No. 8.8.4.2.2 ]

8.8.4.2.2

Purge of exhaust bypass systems shall be accomplished as follows:

(1) Where the bypass system includes an exhaust system (such as a selective catalyticreduction (SCR) system), the purge shall be accomplished by at least five volume changesat purge rate and for a duration of not less than 5 minutes.

(2) * Where the bypass system consists of only ductwork and a damper, the bypass systempurge shall be accomplished by at least five volume changes at purge rate.

A.8.8.4.2.2 The inclusion of a silencer in a bypass stack is not be considered a significantrestriction to the exhaust flow (in the same category as an SCR) that would result in applyingParagrapn 8.8.4.2.2(1)


We have received requests from users trying to understand the impact of a silencer in the bypass stack on the purge requirements for the system. These questions have been with respect to both pure simple cycle machines (a similar annex proposal for NFPA 37 is to be developed) and combined cycle machines with a bypass stack. Per the exhaust design experts, the silencers consist of aerodynamic panels installed parallel to the flow path offering a minimal restriction to flow and are specifically designed to avoid cavities that could "trap" gas or vapor; they have no more propensity to retain gas / vapor than the acoustic treatment of the stack itself. Hence, the existence of such panels in the stack should not drive any additional purge requirements beyond those of the stack itself.

Related ItemFR-740


Submitter Full Name: Larry DannerOrganization: GE Power WaterStreet Address:City:State:Zip:Submittal Date: Wed Sep 06 14:42:41 EDT 2017


of 76




8.8.4.2.3.2

In no case shall the volume in 8.8.4.2.3.1(2) be less than the volume of the HRSG enclosurebetween the combustion turbine outlet and the outlet of the first evaporator section in theHRSG. For other combustion turbine exhaust systems without heat recovery, the purge volumeshall extend to the stack inlet .


Will the committee please clarify if the measurement is intended to be to the stack inlet or the stack outlet on simple cycle installations

Related ItemFR740


Submitter Full Name: James SharpOrganization: Siemens EnergyStreet Address:City:State:Zip:Submittal Date: Tue Nov 14 16:46:09 EST 2017


of 76




8.8.4.4 Light-Off Airflow.

After the purge has been completed, the airflow through the combustion turbine shall bepermitted to be dropped below the purge rate if required by the design to accomplishcombustion turbine ignition. i.e. if directly after the finalized purge the combustion turbine is tobe started


Would the committee please clarify their statement

Related ItemFR740


Submitter Full Name: James SharpOrganization: Siemens EnergyStreet Address:City:State:Zip:Submittal Date: Tue Nov 14 17:45:56 EST 2017


of 76



Public Comment No. 40-NFPA 85-2017 [ Section No. 8.8.4.6 [Excluding any

Sub-Sections] ]

Following a combustion turbine normal shutdown or any combustion turbine trip scenario whichwas not related to an unallowed fuel ingress into exhaust systems e.g. due to a preceeding lossof flame , a combustion turbine purge credit shall be permitted to be established within atechnically feasible time period for the next start-up event provided that the followingrequirements are met for each combustion turbine and duct burner fuel system.


Per Section A.8.8.4.6.4(A)(2) The philosophy for a combustion turbine purge credit is that a combustion turbine normal shutdown does not result in a hazardous atmosphere being introduced. Therefore, a combustion turbine purge should not be required for subsequent startup provided that a combustion turbine purge credit is maintained. We feel there are a number of unplanned shutdowns (engine trips) that meet these criteria in that these shutdowns do not lead to the introduction of a hazardous atmosphere and therefore should qualify for the purge credit. However, we do not feel that the committee has made clear whether or not these shutdowns qualify for the credit. This is particularly true with the committee deleting the definition of "Combustion Turbine Normal Shutdown" in FR 112. We would like to state that while we fully support the need for purging, in some cases un-necessary purging upon a hot turbine can have a profound impact on the life of the machine as purging causes an unnecessary cooling effect of GT components before hot re-start. We believe that if the committee will clarify the philosophy in such a way so that non-critical trip events are clearly included in the philosophy of the purge credit, that is will help to eliminate un-necessary purge events and help to extend the life of the equipment without compromising safety in any way Additionally, would the committee define what technically feasible time period is allowed after combustion turbine shutdown to establish the required conditions for the purge credit?

Related Public Comments for This Document

Related Comment RelationshipPublic Comment No. 52-NFPA 85-2017 [Section No. 8.8.4.6.4(B)]

Related ItemFR210FR 112


Submitter Full Name: James SharpOrganization: Siemens EnergyStreet Address:City:State:Zip:Submittal Date: Wed Nov 15 09:17:16 EST 2017


of 76



Public Comment No. 53-NFPA 85-2017 [ Section No. 8.8.4.6.4(A) ]

(A)* Valve Proving Method.

(1) Where provided, duct burner normal shutdown shall be accomplished.

(2) or any combustion turbine trip scenario which wasnot related to an unallowed fuel ingress into exhaust gas systems e.g. due to a preceedingloss of flame shall be accomplished.

(3) The vent valves shall remain in the fully open position as long as purge credit isestablished.

(4) Fuel gas block and vent valve positions shall be continuously monitored. If continuousmonitoring is lost or any valve deviates from its assigned position, purge credit is lost, andsubsequent start of the combustion turbine requires a combustion turbine purge prior tolight-off, in accordance with 8.8.4.2.

(5) Pressures in the two double block and vent pipe sections shall be continuously monitored.If continuous monitoring is lost or either pressure indicates leakage, purge credit is lost,and subsequent start of the combustion turbine requires a combustion turbine purge priorto light-off, in accordance with 8.8.4.2.

(6) Prior to each start-up and following each normal shutdown, block valves shall be validatedfor gas leak tightness via a valve-proving system. As a minimum, the most downstreamblock valve shall be valve proved during the start-up sequence, and the middle block valveshall be valve proved during the shutdown sequence. The most downstream block valveshall be tested only when airflow is passing through the combustion turbine.

(7) The combustion turbine purge credit period shall not exceed 8 days (192 hours). If acombustion turbine purge in accordance with 8.8.4.2 is performed during the 8-day period,the combustion turbine purge credit is reinitiated for an 8-day period.


Per Section A.8.8.4.6.4(A)(2) The philosophy for a combustion turbine purge credit is that a combustion turbine normal shutdown does not result in a hazardous atmosphere being introduced. Therefore, a combustion turbine purge should not be required for subsequent startup provided that a combustion turbine purge credit is maintained. We feel there are a number of unplanned shutdowns (engine trips) that meet these criteria in that these shutdowns do not lead to the introduction of a hazardous atmosphere and therefore should qualify for the purge credit. However, we do not feel that the committee has made clear whether or not these shutdowns qualify for the credit. This is particularly true with the committee deleting the definition of "Combustion Turbine Normal Shutdown" in FR 112. We would like to state that while we fully support the need for purging, in some cases un-necessary purging upon a hot turbine can have a profound impact on the life of the machine as purging causes an unnecessary cooling effect of GT components before hot re-start. We believe that if the committee will clarify the philosophy in such a way so that non-critical trip events are clearly included in the philosophy of the purge credit, that is will help to eliminate un-necessary purge events and help to extend the life of the equipment without compromising safety in any way


Related Comment RelationshipPublic Comment No. 52-NFPA 85-2017 [Section No. 8.8.4.6.4(B)]Public Comment No. 54-NFPA 85-2017 [Section No. A.8.8.4.6.4(A)(2)]

* Combustion turbine normal shutdown


of 76



Public Comment No. 55-NFPA 85-2017 [Section No. A.8.8.4.7.4(A)(2)]Related Item

FR 112




of 76



Public Comment No. 52-NFPA 85-2017 [ Section No. 8.8.4.6.4(B) ]

(B)* Pressurized Pipe Section Method.

(1) Where provided, duct burner normal shutdown shall or any duct burner trip scenario whichwas not related to an unallowed fuel ingress into the exhaust system e.g. due to apreceeding loss of flame or duct burner fuel system proof of tightness shall beaccomplished.

(2)

(3) The upstream vent valve shall remain in the fully open position, and the downstream ventvalve shall remain in the fully closed position as long as purge credit is established.

(4) Air or inert gas shall be introduced to create and maintain a pressurized pipe sectionbetween the middle and most downstream block valves.

(5) Fuel gas block and vent valve positions shall be continuously monitored. If continuousmonitoring is lost or any valve deviates from its assigned position, purge credit is lost andsubsequent start-up of the combustion turbine requires a combustion turbine purge prior tolight-off, in accordance with 8.8.4.2.

(6) Pressures in the two double block and vent pipe sections shall be continuously monitored.If continuous monitoring is lost or the pressure downstream of the middle block valvedecreases to less than 20.7 kPa (3 psid) above the upstream pressure, purge credit is lostand subsequent start-up of the combustion turbine requires a combustion turbine purgeprior to light-off, in accordance with 8.8.4.2.

(7) The combustion turbine purge credit period shall be considered to be maintained as longas the conditions in 8.8.4.6.4(B)(4), 8.8.4.6.4(B)(5), and 8.8.4.6.4(B)(6) are met.

(8) Provisions shall be made to ensure that fuel cannot enter the air or inert gas supply line atany time.


Per Section A.8.8.4.6.4(A)(2) The philosophy for a combustion turbine purge credit is that a combustion turbine normal shutdown does not result in a hazardous atmosphere being introduced. Therefore, a combustion turbine purge should not be required for subsequent startup provided that a combustion turbine purge credit is maintained. We feel there are a number of unplanned shutdowns (engine trips) that meet these criteria in that these shutdowns do not lead to the introduction of a hazardous atmosphere and therefore should qualify for the purge credit. However, we do not feel that the committee has made clear whether or not these shutdowns qualify for the credit. This is particularly true with the committee deleting the definition of "Combustion Turbine Normal Shutdown" in FR 112. We would like to state that while we fully support the need for purging, in some cases un-necessary purging upon a hot turbine can have a profound impact on the life of the machine as purging causes an unnecessary cooling effect of GT components before hot re-start. We believe that if the committee will clarify the philosophy in such a way so that non-critical trip events are clearly included in the philosophy of the purge credit, that is will help to eliminate un-necessary purge events and help to extend the life of the equipment without compromising safety in any way


Related Comment Relationship

* Combustion turbine normal shutdown or any combustion turbine trip scenario which wasnot related to an unallowed fuel ingress into exhaust gas systems e.g. due to a preceedingloss of flame shall be accomplished.


of 76



Public Comment No. 40-NFPA 85-2017 [Section No. 8.8.4.6 [Excluding anySub-Sections]]Public Comment No. 53-NFPA 85-2017 [Section No. 8.8.4.6.4(A)]Public Comment No. 54-NFPA 85-2017 [Section No. A.8.8.4.6.4(A)(2)]Public Comment No. 55-NFPA 85-2017 [Section No. A.8.8.4.7.4(A)(2)]

Related ItemFR 112




of 76




8.9.2.1.1

A purge of both the appropriate portion of the HRSG enclosure and the bypass system shall becompleted as required in 8.8.4 prior to the admission of combustion turbine exhaust gas into theHRSG.


Is the term "HRSG enclosure" correct? Per 8.8.4.2.1.1 the purge volume is limited to the portion of the HRSG or other combustion turbine exhaust system where the exhaust gas temperature is reduced to at least 56C (100F) for which the system is designed. As currently worded it seems the committee is saying the whole volume of the HRSG enclosure needs to be included.


Related Comment RelationshipPublic Comment No. 46-NFPA 85-2017 [Section No. 8.9.2.2.1]Public Comment No. 48-NFPA 85-2017 [Section No. 8.9.2.1.4.1]Public Comment No. 49-NFPA 85-2017 [Section No. 8.9.2.2.2.1]

Related ItemFR 217




of 76




8.9.2.1.4.1

When it is desired to return the HRSG to service, a purge of the the appropriate portion of theHRSG enclosure shall be performed as required by 8.9.2.1.1.




Related Comment RelationshipPublic Comment No. 46-NFPA 85-2017 [Section No.8.9.2.2.1]

Definition of volume that needs to bepurged

Public Comment No. 47-NFPA 85-2017 [Section No.8.9.2.1.1]

Definition of volume that needs to bepurged

Public Comment No. 49-NFPA 85-2017 [Section No.8.9.2.2.2.1]

Related ItemFR 217




of 76




8.9.2.1.4.3

Where the combustion turbine operation has been interrupted and has been started again bybypass stack and it is desired to return the HRSG to service, the combustion turbine shall bepermitted to continue operating and the combustion turbine exhaust shall be permitted to beused to purge the HRSG, provided the exhaust temperature is at least 56°C (100°F) lower thanthe autoignition temperature of the fuels designed for use in the specific combustion turbine.


Would the committee please clarify the meaning of the paragraph. We feel we are missing information about the restart of the combustion turbine using the bypass stack

Related ItemFR217




of 76




8.9.2.2.1

A purge of both the appropriate portion of the HRSG enclosure and the bypass system shall becompleted as required in 8.8.4 prior to the admission of combustion turbine exhaust gas into theHRSG. In cases where the HRSG is still hot with temeratures exceeding the auto ignitiontemperature of the fuel(s) the HRSG purge may be waived.


In cases where a bypass stack with a diverter damper is provided, is there a HRSG purge needed if the equipment is still in hot condition above the auto ignition temperature of the fuel? In this case a possible explosive mixture should have been ignited during the shutdown period. An omission of the unnecessary purge would save startup time for the utility and reduce stress on the HRSG thereby extending life


Related Comment RelationshipPublic Comment No. 47-NFPA85-2017 [Section No. 8.9.2.1.1]

This comment is also intended to clarify the portion of theHRSG enclosure needed for the volume calculations

Public Comment No. 48-NFPA85-2017 [Section No.8.9.2.1.4.1]Public Comment No. 49-NFPA85-2017 [Section No.8.9.2.2.2.1]

Related ItemFR-217




of 76



Public Comment No. 43-NFPA 85-2017 [ Section No. 8.9.2.2.2 [Excluding any

Sub-Sections] ]

Where HRSG isolation is continuously maintained and the combustion turbine operation isinterrupted, the combustion turbine shall be permitted to purge and operate with combustionturbine exhaust through the bypass stack. The duct burner fuel systems and the ammoniasystems shall comply with 8.8.4.6 and 8.8.4.7 respectively


Has the committee considered hot spots on the diverter damper back side during combustion turbine operation via the bypass stack? This might also lead to a hazardous situation. Therefore we consider a proven tight fuel supply according to 8.8.4.4 and 8.8.4.7 for the supplementary firing as essential arrangements with exhaust bypass systems.

Related ItemFR217




of 76




8.9.2.2.2.1

When HRSG isolation is removed, a purge of the appropriate portion of the HRSG enclosureshall be performed as required by 8.9.2.2.1, except as permitted in 8.9.2.2.4.




Related Comment RelationshipPublic Comment No. 47-NFPA 85-2017 [Section No. 8.9.2.1.1] Same definitionPublic Comment No. 46-NFPA 85-2017 [Section No. 8.9.2.2.1] Same definitionPublic Comment No. 48-NFPA 85-2017 [Section No. 8.9.2.1.4.1] Same definition

Related ItemFR 217




of 76




8.9.2.2.2.2

Where the combustion turbine operation has been interrupted and has been started again viabypass stack, and it is desired to return the HRSG to service, the combustion turbine shall bepermitted to continue operating and the combustion turbine exhaust shall be permitted to beused to purge the HRSG, provided the exhaust temperature is at least 56°C (100°F) lower thanthe autoignition temperature of the fuels designed for use in the specific combustion turbine andthe duct burner.


Would the committee please clarify the meaning of the paragraph. We feel we are missing information about the restart of the combustion turbine using the bypass stack

Related ItemFR217




of 76




8.9.3.2.3

Where leakage is detected, the HRSG shall be purged at a temperature at least 56°C (100°F)below the autoignition temperature of the fuel before hot combustion turbine gases are allowedto enter the HRSG enclosure.


We don't understand the reason for the paragraph. Can the committee clarify? If the combustion turbine has been operated without any interruption, why should a purge be necessary?

Related Item




of 76




8.9.3.2.8

Where shutoff dampers are utilized, a means to prevent combustible fuel accumulationupstream of the damper respectively in the compartment between the diverter damper and theshutoff damper shall be provided.


Would the committee please clarify the statement

Related Item




of 76




8.9.4.2

In addition to the required alarms in 8.7.3.2 , reverse flow through a HRSG (airflow fromexhaust stack through a HRSG to bypass stack) shall be alarmed if the bypass damper systemcan be maintained in an intermediate position.


We don't see any technically feasible solution to fulfill this requirement. What is the idea behind it?

Related Item




of 76




8.9.5.1.2

To satisfy the stack closure not correct interlock (see 8.4.2.2.3), either of the followingconditions shall be met:

(1) The bypass damper proven closed and the HRSG isolation damper (and stack or stackdamper if provided) not proven open

(2) Where a stack damper is provided, the diverter damper proven open to HRSG and stackdamper not proven open


The word "and" has to be replaced by an "or" in our opinion as the exhaust duct has to be always fully open in one direction

Related Item




of 76



Public Comment No. 54-NFPA 85-2017 [ Section No. A.8.8.4.6.4(A)(2) ]

A.8.8.4.6.4(A)(2) The philosophy for combustion turbine purge credit is that a combustion turbine normalshutdown does not result in a hazardous atmosphere being introduced. Such a result can beaccomplished through either a planned combustion turbine normal shutdown or through anunplanned trip of the combustion turbine provided the unplanned trip is of a nature that it doesnot allow fuel ingress into the exhaust spaces e.g. due to a prceeding loss of flame. Therefore,a combustion turbine purge should not be required for subsequent startup provided that acombustion turbine purge credit is maintained.


Per this section the philosophy for a combustion turbine purge credit is that a combustion turbine normal shutdown does not result in a hazardous atmosphere being introduced. This philosophy can be realized in in various ways. We feel this clarification is needed in particular since the committee has removed the definition 3.3.119.1 Combustion Turbine Normal Shutdown from the definitions section yet continues to use the term throughout the first draft without defining what it means. We feel there are a number of unplanned shutdowns (engine trips) that meet these criteria in that these shutdowns do not lead to the introduction of a hazardous atmosphere and therefore should qualify for the purge credit. However, we do not feel that the committee has made clear whether or not these shutdowns qualify for the credit. We would like to state that while we fully support the need for purging, in some cases un-necessary purging upon a hot turbine can have a profound impact on the life of the machine as purging causes an unnecessary cooling effect of GT components before hot re-start. We believe that if the committee will clarify the philosophy in such a way so that non-critical trip events are clearly included in the philosophy of the purge credit, that is will help to eliminate un-necessary purge events and help to extend the life of the equipment without compromising safety in any way


Related Comment RelationshipPublic Comment No. 53-NFPA 85-2017 [Section No. 8.8.4.6.4(A)] Same definitionPublic Comment No. 52-NFPA 85-2017 [Section No. 8.8.4.6.4(B)] Same DefinitionPublic Comment No. 55-NFPA 85-2017 [Section No. A.8.8.4.7.4(A)(2)]

Related ItemFR 112




of 76



Public Comment No. 55-NFPA 85-2017 [ Section No. A.8.8.4.7.4(A)(2) ]

A.8.8.4.7.4(A)(2) The philosophy for combustion turbine purge credit is that a combustion turbine normalshutdown does not result in a hazardous atmosphere being introduced. Therefore Such aresult can be accomplished through either a planned combustion turbine normal shutdown orthrough an unplanned trip of the combustion turbine provided the unplanned trip is of a naturethat it does not allow fuel ingress into the exhaust spaces e.g. due to a prceeding loss offlame. Therefore , a combustion turbine purge should not be required for subsequent startupprovided that a combustion turbine purge credit is maintained.


Per this section the philosophy for a combustion turbine purge credit is that a combustion turbine normal shutdown does not result in a hazardous atmosphere being introduced. This philosophy can be realized in in various ways. We feel this clarification is needed in particular since the committee has removed the definition 3.3.119.1 Combustion Turbine Normal Shutdown from the definitions section yet continues to use the term throughout the first draft without defining what it means. We feel there are a number of unplanned shutdowns (engine trips) that meet these criteria in that these shutdowns do not lead to the introduction of a hazardous atmosphere and therefore should qualify for the purge credit. However, we do not feel that the committee has made clear whether or not these shutdowns qualify for the credit. We would like to state that while we fully support the need for purging, in some cases un-necessary purging upon a hot turbine can have a profound impact on the life of the machine as purging causes an unnecessary cooling effect of GT components before hot re-start. We believe that if the committee will clarify the philosophy in such a way so that non-critical trip events are clearly included in the philosophy of the purge credit, that is will help to eliminate un-necessary purge events and help to extend the life of the equipment without compromising safety in any way


Related Comment RelationshipPublic Comment No. 52-NFPA 85-2017 [Section No. 8.8.4.6.4(B)]Public Comment No. 53-NFPA 85-2017 [Section No. 8.8.4.6.4(A)]Public Comment No. 54-NFPA 85-2017 [Section No. A.8.8.4.6.4(A)(2)]

Related ItemFR 112




of 76

Attachment E: Review of Committee Inputs


of 76


http://submittals.nfpa.org/TerraViewWeb/ViewerPage.jsp 1/1

Committee Input No. 220-NFPA 85-2017 [ Section No. 8.4.3.2.2.1 ]

8.4.3.2.2.1 * Prevention of Overpressure.

(A)

The portion of the fuel supply system upstream of the fuel control valve shall be designed so as toprevent the exceeding of design pressure in the fuel-burning system, even in the event of failure ofthe main supply constant fuel pressure regulator(s).

(B)

Where full relieving capacity is not installed, the piping system shall be designed for the full supplypressure up to and including all individual burner and igniter safety shutoff valves.


Submitter Full Name: BCS-HRSOrganization: [ Not Specified ]Street Address:City:State:Zip:Submittal Date: Thu Feb 09 16:54:49 EST 2017


CommitteeStatement:

The Fundamentals Committee has added requirements for overpressure protection in section4.10.1.2. The HRSG Committee will review this material and consider removing theseoverpressure requirements at the Second Draft stage.

ResponseMessage:

Ballot Results

This item has not been balloted


of 76

Attachment F: Review of Correlating Committee Notes


of 76



Correlating Committee Note No. 6-NFPA 85-2017 [ Section No. 8.4.2 ]




CommitteeStatement:

The HRS Committee is encouraged to communicate with the NFPA 37 Technical Committeeto ensure that NFPA 85 requirements for combustion turbines are not in conflict with NFPA 37requirements and are being referenced as appropriate within NFPA 37.

Ballot Results




Not ReturnedBasile, Barry J.

Dexter, David E.


Affirmative AllBuckingham, Fred P.

Cannon, David Paul

Chappell, Timothy

Evely, Dale P.

Fleming, Ronald J.

Franks, James E.

King, David W.

Kinoshita, Masaaki

Lance, Gail J.


of 76



Mason, Dennis P.

May, Daniel R.

Schmidt, Celso G.

Steen, Lloyd E.

Voss, Justin D.

Wolff, Marc A.

Wong, Henry K.

Yates, Harold R.


of 76



Correlating Committee Note No. 7-NFPA 85-2017 [ Section No. 8.7.4.3 ]




CommitteeStatement:

In subparagraph (12), the HRS committee should reconsider the wording "trips and associateddevices" because the associated devices are already covered in the HRSG control and burnermanagement systems. The word "system" was appropriate for HRSG control and burnermanagement, and should be reinstated. See the First Revision on 6.6.5.2.5.3 for a similarchange.

Ballot Results





Dexter, David E.



Cannon, David Paul

Chappell, Timothy

Evely, Dale P.

Fleming, Ronald J.

Franks, James E.

King, David W.

Kinoshita, MasaakiNFPA 85 (BCS-HRS) Second Draft Technical Committee Meeting Agenda

January 25, 2018 - New Orleans, LA of 76



Lance, Gail J.

Mason, Dennis P.

May, Daniel R.

Schmidt, Celso G.

Steen, Lloyd E.

Voss, Justin D.

Wolff, Marc A.

Wong, Henry K.

Yates, Harold R.


of 76



Correlating Committee Note No. 8-NFPA 85-2017 [ Section No. 8.4.3.2.2.3 ]




CommitteeStatement:

The HRS Committee should consider adding the language shown in brackets below, to clarifythat this section applies to both the igniter and the main fuel lines and to correlate with8.4.2.1.1.2 and 8.4.2.1.2.2: 8.4.3.2.2.3 Triple Block and Double Vent Valve Arrangement. Three safety shutoff valves in series, with proof of closure, shall be provided in [each] fuel lineto the duct burner for units with combustion turbine purge credit provisions in accordance with8.8.4.6. An automatic vent valve shall be provided between each of these valves.

Ballot Results





Dexter, David E.



Cannon, David Paul

Chappell, Timothy

Evely, Dale P.

Fleming, Ronald J.


of 76



Franks, James E.

King, David W.

Kinoshita, Masaaki

Lance, Gail J.

Mason, Dennis P.

May, Daniel R.

Schmidt, Celso G.

Steen, Lloyd E.

Voss, Justin D.

Wolff, Marc A.

Wong, Henry K.

Yates, Harold R.


of 76

Attachment G: Review of Fundamentals Technical Committee actions


of 76

Second Revision No. 711-NFPA 85-2017 [ Chapter 2 ]

Chapter 2 Referenced Publications

2.1 General.

The documents or portions thereof listed in this chapter are referenced within this code and shall beconsidered part of the requirements of this document.

2.2 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 30, Flammable and Combustible Liquids Code, 2018 edition.

NFPA 31, Standard for the Installation of Oil-Burning Equipment, 2016 edition.

NFPA 54, National Fuel Gas Code, 2018 edition.

NFPA 56 Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable GasPiping Systems,2017 edition.

NFPA 68 Standard on Explosion Protection by Deflagration Venting,2018 edition.

NFPA 69, Standard on Explosion Prevention Systems, 2019 edition.

NFPA 70®, National Electrical Code®, 2017 edition.

2.3 Other Publications.

2.3.1 ASCE Publications.

American Society of Civil Engineers, 1801 Alexander Bell Drive, Reston, VA 20191-4400.

ASCE 7, Minimum Design Loads for Buildings and Other Structures, 2010 2016 .

2.3.2 ASME Publications.

American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016-5990.

ASME B31.1, Power Piping, 2012 2016 .

ASME B31.3, Process Piping, 2012 2016 .

2.3.3 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

ASTM D388, Standard Classification of Coals by Rank, 2012 2017 .

ASTM D396, Standard Specification for Fuel Oils, 2012 2017 .

ASTM D409, Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method, 2012 2016 .

ASTM D1655, Standard Specification for Aviation Turbine Fuels, 2012 2017 .

ASTM D2880, Standard Specification for Gas Turbine Fuel Oils, 2003, reaffirmed 2010 2015 .

2.3.4 CGA Publications.

Compressed Gas Association, 14501 George Carter Way, Suite 103, Chantilly, VA 20151-2923.

ANSI/ CGA G-2.1/ANSI K61.1 , Safety Requirements for the Storage and Handling of AnhydrousAmmonia, 1999 2014.

2.3.5 FCI Publications.

Fluid Controls Institute, 1300 Sumner Avenue, Cleveland, OH 44115.

ANSI/FCI 70-2, Control Valve Seat Leakage, 2006 2013 .

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

1 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

2.3.6 IEC Publications.

International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211, Geneva 20,Switzerland.

IEC 61508, Functional Safety of Electrical/Electronic Programmable Electronic Safety-Related Systems,2010.

2.3.7 Military Specifications.

Department of Defense Single Stock Point, Document Automation and Production Service, Building 4/D,700 Robbins Avenue, Philadelphia, PA 19111-5094.

MIL-T-5624, Turbine Fuel, Aviation, Grade JP4, JP5, and JP5/JP8 ST, 1995.

2.3.8 U.S. Government Publications.

U.S. Government Publishing Office, 732 North Capitol Street, NW, Washington, DC 20401-0001

Title 29, Code of Federal Regulations, Part 1926.32, “General Safety and Health Provisions.”

2.3.9 Other Publications.

Merriam-Webster’s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, 2003.

2.4 References for Extracts in Mandatory Sections.

NFPA 13D, Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings andManufactured Homes, 2019 edition.

NFPA 40, Standard for the Storage and Handling of Cellulose Nitrate Film, 2019 edition.

NFPA 58, Liquefied Petroleum Gas Code, 2017 edition.

NFPA 72®, National Fire Alarm and Signaling Code, 2019 edition.

NFPA 850, Recommended Practice for Fire Protection for Electric Generating Plants and High VoltageDirect Current Converter Stations, 2015 edition.


Submitter Full Name: Laura Moreno

Organization: National Fire Protection Assoc

Street Address:

City:

State:

Zip:

Submittal Date: Thu Nov 30 11:53:08 EST 2017

Committee Statement

Committee Statement: Updating references to most recent editions.

Response Message:


2 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 701-NFPA 85-2017 [ New Section after 3.3.33 ]

3.3.X Combustion Turbine Normal Shutdown.

The normal sequence of events that automatically provides successful shutdown of the combustion turbinewith no abnormal conditions in the combustion system.




Street Address:

City:

State:

Zip:

Submittal Date: Wed Nov 29 10:44:48 EST 2017

Committee Statement

CommitteeStatement:

The term is used throughout Chapter 8 and in other definitions in Chapter 3, and needs tobe defined.

Response Message:

Public Comment No. 21-NFPA 85-2017 [Section No. 3.3.19]


3 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76


Deflagration. Propagation of a combustion zone at a velocity that is less than the speed of sound in theunreacted medium. [68, 2018]




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: A definition for deflagration is being added based on the use of the term in Chapter 9.

Response Message:

Public Comment No. 33-NFPA 85-2017 [New Section after 3.3.41]


4 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 703-NFPA 85-2017 [ Section No. 3.3.49 ]

3.3.49 Explosion Vent.

A vent to relieve explosion deflagration pressures resulting from ignition of a mixture of decompositiongases and air. [ 40, 2019]




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

"Explosion pressures" has been changed to "deflagration pressures" to correlate with the firstdraft changes to Chapter 9 and the new definition for deflagration.

ResponseMessage:



5 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 709-NFPA 85-2017 [ Section No. 3.3.72.2 ]

3.3.72.2* Class 2 Igniter.

An igniter that is applied to ignite the fuel input through the burner under prescribed light-off conditions. It isalso used to support ignition under low load or certain adverse operating conditions stabilize the mainburner flame .

A.3.3.72.2 Class 2 Igniter.

The heat input of a Class 2 igniter is generally 4 percent to 10 percent of maximum burner heat input.




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: This revision is made to be consistent with the revision on 4.7.7.6.

Response Message:


6 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76


4.3.3 The owner shall specify the lowest autoignition temperature (AIT) for all fuels fired in the boiler and/orcombustion turbine over the range of the expected operating conditions taking into consideration fuelcomposition, temperature, pressure and oxygen concentration.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Autoignition temperature is required information in order to design and operate a boiler and/orits combustion system and should be specified in the contract documents or equivalent.

ResponseMessage:




7 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 706-NFPA 85-2017 [ Section No. 4.5.5 ]

4.5.5

Interlocks shall be permitted to be temporarily removed from service in accordance with the following:

(1) Removal of the interlock shall be authorized by a competent person and , documented in accordancewith operating procedures, and communicated to operations personnel .

(2) Alternate means shall be substituted to supervise the interlock in accordance with operatingprocedures.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

Language was added to clarify that notification of operating personnel is required wheneveran interlock is bypassed.

ResponseMessage:



8 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 710-NFPA 85-2017 [ Sections 4.7.7.4, 4.7.7.5, 4.7.7.6, 4.7.7.7 ]

Sections 4.7.7.4, 4.7.7.5, 4.7.7.6, 4.7.7.7

4.7.7.4

Class 2 igniters shall not be used to ignite the main fuel under uncontrolled or abnormal conditions.

4.7.7.5

Where Class 3 igniters are used, the igniter shall be turned off as a part of the burner light-off procedurewhen the time trial for ignition of the main burner has expired, to ensure that the main flame is notdependent on ignition support from the igniter.

4.7.7.6 *

Class 2 igniters shall not be used to extend the turndown range but shall be permitted to be used tosupport ignition under low-load or adverse operating conditions stabilize the main burner flame.

A.4.7.7.6 There are situations when a class 2 igniter can be returned to service to stabilize the main burnerflame, such as minor excursions from normal operating conditions. Temporary minor excursions include theintroduction of a slug of off-spec fuel, such as wet coal or noncombustibles. However, a class 2 ignitershould not be returned to service to avoid a load-based trip of a burner or mill, or if adding additional fuelcould lead to an unsafe operating condition .

4.7.7.7

Class 3 igniters shall not be used to support ignition stabilize the main burner flame or to extend the burnerturndown range.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

The text is updated to more accurately describe the purpose of bringing a class 2 igniter back intoservice under load. The annex text is intended to provide guidance on the appropriate use of class2 igniters to stabilize the main burner flame. Text on class 3 igniters is updated to be consistentwith the previous revision.

ResponseMessage:


9 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 707-NFPA 85-2017 [ Section No. 4.10.1 [Excluding any Sub-

Sections] ]

Fuel gas piping shall be minimum schedule 40, and material and system design shall be in accordance withNFPA 54 (for fuel gas piping inside industrial and institutional buildings), ASME B31.1, Power Piping (forfuel gas piping in power applications), or ASME B31.3, Process Piping (for fuel gas piping in processapplications).




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

The 2018 edition of NFPA 54 will permit schedule 10 piping. This revision is enforcing thecurrent NFPA 85 requirement of minimum schedule 40 which was based on earlier editions ofNFPA 54.

ResponseMessage:

Public Comment No. 9-NFPA 85-2017 [Section No. 4.10.1 [Excluding any Sub-Sections]]


10 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 708-NFPA 85-2017 [ Section No. 4.10.1.2 ]

4.10.1.2 Overpressure Protection.

4.10.1.2.1

Overpressure protection shall be provided in either of the following cases:

(1) When the supply pressure exceeds the design pressure rating of any downstream component

(2) When the failure of a single upstream line regulator or service pressure regulator results in a supplypressure exceeding the design pressure rating of any downstream component

4.10.1.2.2

Overpressure protection shall be provided by any one of the following:

(1) A series regulator in combination with a line regulator or service pressure regulator

(2) A monitoring regulator installed in combination with a line regulator or service pressure regulator

(3)

(4) An overpressure cutoff device, such as a slam-shut valve or a high-pressure switch in combination withan adequately rated shutoff valve

4.10.1.2.3

When a relief valve is used to comply with 4.10.1.2.1, the relief valve shall be a full-capacity relief type.

4.10.1.2.4

Token relief valves and internal token relief valves shall not be permitted to be used as the onlyoverpressure protection devices.

4.10.1.2.5* Set Point of the Overpressure Protection Device.

The overpressure protection device shall be set to provide a maximum downstream pressure as follows:

When the rated pressure of any component is less than 83 kPa (12 psig), the set point of the overpressureprotection device shall not exceed 150 percent of the rated pressure of the lowest rated component.

When the rated pressure of any component is equal to or greater than 83 kPa (12 psig) but less than 414kPa (60 psig), the set point of the overpressure protection device shall not exceed 41 kPa (6 psig) abovethe rated pressure of the lowest rated component.

When the rated pressure of any component is equal to or greater than 414 kPa (60 psig), the set point ofthe overpressure protection device shall not exceed 110 percent of the rated

(s) shall be set not higher than the design pressure of the lowest rated downstream component.

* A full-capacity pressure relief valve

A.4.10.1.2.2(3)

Upon upstream pressure regulation failure, a full-capacity pressure relief valve (versus token reliefvalves) will limit the downstream pressure. Token relief valves only provide minimum pressure reliefin cases where ambient temperatures increase the pressure inside the gas piping, which can occurduring shutdown periods, or relieve small increases of pressure due to high lockup pressures thatoccur during a shutdown.


11 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

A.4.10.1.2.5

The pressure limits in this section are consistent with 49 CFR 192.201, “Required Capacity of PressureRelieving and Limiting Stations.” An example of design pressure for a safety shutoff valve would be theopen and close rating.




Street Address:

City:

State:

Zip:


Committee Statement

CommitteeStatement:

The design pressure is that at which components will continue to operate safely and properly, andwithout damage, and the intent is that the overpressure protection setpoint is lower than thedesign pressure of all downstream components.

ResponseMessage:

Public Comment No. 8-NFPA 85-2017 [Section No. 4.10.1.2]


12 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 704-NFPA 85-2017 [ Section No. A.3.3.75 ]

A.3.3.75 Interlock.

An interlock can consist of a sensing function, a control function, and an output or a final control element.The interlock can be accomplished with the use of any combination of electrical devices, mechanicaldevices, or logic. An action by an operator is not considered to be an interlock.




Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: It was not previously clear that an operator action is not considered to be an interlock.

Response Message:

Public Comment No. 7-NFPA 85-2017 [Section No. 3.3.75 [Excluding any Sub-Sections]]


13 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

Second Revision No. 712-NFPA 85-2017 [ Chapter K ]

Annex K Informational References

K.1 Referenced Publications.

The documents or portions thereof listed in this annex are referenced within the informational sections ofthis code and are not part of the requirements of this document unless also listed in Chapter 2 for otherreasons.

K.1.1 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 30, Flammable and Combustible Liquids Code, 2018 edition.

NFPA 31, Standard for the Installation of Oil-Burning Equipment, 2016 edition.

NFPA 51, Standard for the Design and Installation of Oxygen–Fuel Gas Systems for Welding, Cutting, andAllied Processes, 2018 edition.

NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, 2019 edition.

NFPA 54, National Fuel Gas Code, 2018 edition.

NFPA 56, Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable GasPiping Systems, 2017 edition.

NFPA 58, Liquefied Petroleum Gas Code, 2017 edition.

NFPA 68, Standard on Explosion Protection by Deflagration Venting, 2018 edition.


NFPA 70®, National Electrical Code®, 2017 edition.

NFPA 77, Recommended Practice on Static Electricity, 2019 edition.

NFPA 85, Boiler and Combustion Systems Hazards Code, 2007 edition.

NFPA 85, Boiler and Combustion Systems Hazards Code, 2011 edition.

NFPA 241, Standard for Safeguarding Construction, Alteration, and Demolition Operations, 2018 edition.

NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and ofHazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, 2017 edition.

NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous(Classified) Locations for Electrical Installations in Chemical Process Areas, 2017 edition.

NFPA 850, Recommended Practice for Fire Protection for Electric Generating Plants and High VoltageDirect Current Converter Stations, 2015 edition.

K.1.2 Other Publications.

K.1.2.1 ABMA Publications.

American Boiler Manufacturers Association, 8221 Old Courthouse Road, Suite 202, Vienna, VA22182–3839.

ABMA 203, A Guide to Clean and Efficient Operation of Coal-Stoker-Fired Boilers, 2002.

ABMA 307, Combustion Control Guidelines for Single Burner Firetube and WatertubeIndustrial/Commercial/Institutional Boilers, 1999.

K.1.2.2 AlChE Publications.

American Institute of Chemical Engineers, 120 Wall Street, FL 23, New York, NY 10005-4020.

Guidelines for Hazard Evaluation Procedures, 2008.


14 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

K.1.2.3 API Publications.

American Petroleum Institute, 1220 L Street, NW, Washington, DC 20005-4070.

API 620, Standard for Design and Construction of Large, Welded, Low-Pressure Storage Tanks,2009 2013 .

API 650, Standard for Welded Steel Tanks for Oil Storage, 2008 2013 .

API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at PetroleumFacilities Classified as Class I, Division 1 and Division 2, 1998 (reaffirmed 2002).

API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at PetroleumFacilities Classified as Class I, Zone 0, Zone 1, and Zone 2, 1997 (reaffirmed 2002 2013 ).

API RP 2003, Recommended Practice for Protection Against Ignitions Arising Out of Static, Lightning, andStray Currents, 2008 2015 .

K.1.2.4 ASME Publications.

American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016-5990.

ASME Boiler and Pressure Vessel Code, 2007 2017 .

K.1.2.5 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

ASTM D396, Standard Specification for Fuel Oils, 2009 2017 .

ASTM D409, Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method, 2012 2016 .

ASTM E1226, Standard Test Method for Explosibility of Dust Clouds, 2010 2012 .

K.1.2.6 EEMUA Publications.

The Engineering Equipment and Material Users Association, 63 Mark Lane, London UK EC3R 7NQ.

EEMUA 191, Alarm Systems — A Guide to Design, Management, and Procurement, 2007 2013 .

K.1.2.7 IEC Publications.

International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20,Switzerland.

IEC 61511, Functional Safety — Safety Instrumented Systems for the Process Industry Sector, 20032016 .

K.1.2.8 ISA Publications.

International Society of Automation, 67 T. W. Alexander Drive, PO Box 12277, Research Triangle Park, NC27709.

ANSI/ISA 18.2, Management of Alarm Systems for the Process Industries, 2009 2016 .

ANSI/ISA 77.41.01, Fossil Fuel Power Plant Boiler Combustion Controls, 2005 2015 .

ANSI/ISA 77.42.01, Fossil Fuel Power Plant Feedwater Control System — Drum Type, 1999(R2006 R2011 ).

ANSI/ISA 77.43.01, Fossil Fuel Power Plant Unit/Plant Demand Development — Drum Type, 2002(R2008) 2014 .

ANSI/ISA 77.44.01, Fossil Fuel Power Plant — Steam Temperature Controls, 2007 (R2013) .

ANSI/ISA 84.00.01, Application of Safety Instrumented Systems for the Process Industry, 2004.

ISA TR18.2.4, Enhanced and Advanced Alarm Methods, 2012

ISA TR18.2.5, Alarm System Monitoring, Assessment, and Auditing, 2012.

K.1.2.9 Government Publications.

U.S. Government Publishing Office, 732 North Capitol Street, NW, Washington, DC 20401-0001.

Title 49, Code of Federal Regulations, Part 192.201, "Required Capacity of Pressure Relieving and LimitingStations."


15 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

K.1.2.10 Other Publications.

Noronha, J. A., J. T. Merry, and W. C. Reid. "Deflagration Pressure Containment (DPC) for Vessel SafetyDesign." Plant/Operations Progress 1, no. 1 (January 1982): 1–6.

K.2 Informational References.

The following documents or portions thereof are listed here as informational resources only. They are not apart of the requirements of this document.

K.2.1 Additional HRSG References.

The following documents provide additional information on iron fires.

Johnson, A. A., J. A. Von Franuhofer, and E. W. Jannett, “Combustion of Finned Steel Tubing During StressRelief Heat Treatment,” Journal of Heat Treating, Vol. 4, No. 3, June 1986, pp. 265–271.

McDonald, C. F., “The Potential Danger of Fire in Gas Turbine Heat Exchangers,” ASME 69-GT-38.

Theoclitus, G., “Heat Exchanger Fires and the Ignition of Solid Metals,” Journal of Engineering for GasTurbines and Power, Vol. 107, July 1985, pp. 607–612.

K.3 References for Extracts in Informational Sections.

NFPA 58, Liquefied Petroleum Gas Code , 2017 edition.





Street Address:

City:

State:

Zip:


Committee Statement

Committee Statement: Updating references to most recent editions.

Response Message:


16 of 16 12/18/2017, 5:10 PM

Draft R

evisio

ns

Subjec

t to Ball

ot


of 76

TECHNICAL COMMITTEE ON HEAT RECOVERY ... - NFPA

Documents

Transcript of TECHNICAL COMMITTEE ON HEAT RECOVERY ... - NFPA