M E M O R A N D U M. Technical Committee on Electrical Equipment in Chemical Atmospheres TO: Sarah Caldwell, Project Administrator FROM:

Transcription

1 National Fire Protection Association 1 Batterymarch Park, Quincy, MA Phone: Fax: M E M O R A N D U M TO: FROM: Technical Committee on Electrical Equipment in Chemical Atmospheres Sarah Caldwell, Project Administrator DATE: January 28, 2016 SUBJECT: NFPA 497 Second Draft Technical Committee FINAL Ballot Results (A16) According to the final ballot results, all ballot items received the necessary affirmative votes to pass ballot. According to the final ballot results, all ballot items received the necessary affirmative votes to pass ballot 24 Members Eligible to Vote 4 Members Not Returned (Saverino, Sierra, Ural, Zewe) 19 Members Voted Affirmative on All Revisions (Cawthon, Fiske, Rodgers) 1 Members Voted Negative on one or more Revisions (Cawthon) 0 Members Abstained on one or more Revisions The attached report shows the number of affirmative, negative, and abstaining votes as well as the explanation of the vote for each revision. To pass ballot, each revision requires: (1) a simple majority of those eligible to vote and (2) an affirmative vote of 2 /3 of ballots returned. See Sections (c) and of the Regulations Governing the Development of NFPA Standards.

2 National Fire Protection Association Report of /28/ :36 PM Second Revision No. 1-NFPA [ Chapter 2 ] Chapter 2 Referenced Publications 2.1 General. The documents or portions thereof listed in this chapter are referenced within this recommended practice and should be considered part of the recommendations of this document. 2.2 NFPA Publications. National Fire Protection Association, 1 Batterymarch Park, Quincy, MA NFPA 30, Flammable and Combustible Liquids Code, 2015 edition. NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, edition. NFPA 34, Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids, 2015 edition. NFPA 35, Standard for the Manufacture of Organic Coatings, 2016 edition. NFPA 36, Standard for Solvent Extraction Plants, 2013 edition. NFPA 45, Standard on Fire Protection for Laboratories Using Chemicals, 2015 edition. NFPA 55, Compressed Gases and Cryogenic Fluids Code, 2016 edition. NFPA 58, Liquefied Petroleum Gas Code, 2017 edition. NFPA 59A, Standard for the Production, Storage, and Handling of Liquefied Natural Gas (LNG), 2016 edition. NFPA 70, National Electrical Code, 2017 edition. 2.3 Other Publications API Publications. American Petroleum Institute, 1220 L Street, NW, Washington, DC API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, 3rd edition, API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2, 2002, reaffirmed ASHRAE Publications. American Society of Heating, Refrigeration and Air-Conditioning Engineers ASHRAE, Inc., 1791 Tullie Circle NE, Atlanta, GA ASHRAE 15 ASHRAE STD 15, Safety Standard for Refrigeration Systems, ASHRAE STD 34, Designation and Classification of Refrigerants, ASTM Publications. ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA ASTM D323, Standard Method of Test for Vapor Pressure of Petroleum Products (Reid Method), 2008, ( reaffirmed 2014) CGA Publications. Compressed Gas Association, George Carter Way, Suite 103, Chantilly, VA CGA G2.1, Safety Requirements for the Storage and Handling of Anhydrous Ammonia, th edition, 2014.

3 National Fire Protection Association Report of /28/ :36 PM IEC Publications. International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20, Switzerland. IEC , Explosive atmospheres Part 20-1: Material characteristics for gas and vapor classification Test methods and data, ISA Publications. The International Society of Automation, 67 T.W. Alexander Drive, P.O. Box 12277, Research Triangle Park, NC ISA-RP , Standard for Portable Electronic Products Suitable for Use in Class I and II, Division 2, Class I Zone 2 and Class III, DIivision Division 1 and 2 Hazardous (Classified) Locations, Other Publications. Merriam-Webster s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, References for Extracts in Recommendations Sections. NFPA 30, Flammable and Combustible Liquids Code, 2015 edition. NFPA 59A, Standard for the Production, Storage, and Handling of Liquefied Natural Gas (LNG), edition. NFPA 70, National Electrical Code, edition. Submitter Information Verification Submitter Full Name: Eric Nette Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Oct 02 13:04:26 EDT 2015 Committee Statement Committee Statement: Updated reference to ASHRAE STD 15 & 34. Updated CGA G2.1 year. Response Message: Public Comment No. 1-NFPA [Chapter 2] Ballot Results This item has passed ballot 24 Eligible Voters 4 Not Returned 19 Affirmative All 0 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Saverino, Joseph V.

4 National Fire Protection Association Report of /28/ :36 PM Sierra, Rodolfo N. Ural, Erdem A. Zewe, Jack H. Affirmative All Ankele, Donald W. Biradar, Babanna Brown, Ronald M. Cadd, Jonathan L. Chantler, Paul Cirelli, Chris Cusimano, Alberto DeFelice, Jr., Frank C. Egloff, Matt Fiske, William T. Garfunkel, Felix J. Jamison, Jr., Jack E. Lawrence, Jr., William G. Malanga, Robert Morrison, Adam Myers, Timothy J. Rodgers, Samuel A. Stallcup, James G. Wechsler, David B. Negative with Comment Cawthon, John H. Wording need not be change.

5 National Fire Protection Association Report of /28/ :36 PM Second Revision No. 5-NFPA [ Section No [Excluding any Sub-Sections] ]

6 National Fire Protection Association Report of /28/ :36 PM An alphabetical listing of selected combustible materials, with their group classification and relevant physical properties, is provided in Table Table Selected Chemicals Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Vapor Density (Air = 1) Vapor Pressure b (mm Hg) Cla Zo Gro Acetaldehyde C d I II Acetic Acid D d II II Acetic Acid- tert-butyl Ester D II Acetic Anhydride D II II Acetone D d I II Acetone Cyanohydrin D IIIA Acetonitrile D I II Acetylene A d GAS II Acrolein (Inhibited) B(C) d I II Acrylic Acid D II II Acrylonitrile D d I II Adiponitrile D IIIA Allyl Alcohol C d I II Allyl Chloride D I II Allyl Glycidyl Ether B(C) e II Alpha-Methyl Styrene D II n-amyl Acetate D I II sec-amyl Acetate D I II Ammonia D d,f GAS II Aniline D IIIA II Benzene D d I II Benzyl Chloride D IIIA Bromopropyne D I n-butane D d,g GAS II 1,3-Butadiene B(D) d,e GAS II 1-Butanol D d I II Butyl alcohol (s) (butanol-2) D d I II Butylamine D GAS II Butylene D I II n-butyraldehyde C d I II n-butyl Acetate D d I II sec-butyl Acetate D II tert-butyl Acetate D II n-butyl Acrylate (Inhibited) D II II

7 National Fire Protection Association Report of /28/ :36 PM Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Vapor Density (Air = 1) Vapor Pressure b (mm Hg) Cla Zo Gro n-butyl Glycidyl Ether B(C) e II n-butyl Formal C IIIA 34.3 Butyl Mercaptan C I Butyl-2-Propenoate D II para tert-butyl Toluene D IIIA n-butyric Acid D d IIIA Carbon Disulfide d,h I II Carbon Monoxide C d GAS II Chloroacetaldehyde C IIIA Chlorobenzene D I Chloro-1- Nitropropane C IIIA Chloroprene D GAS Cresol D IIIA Crotonaldehyde C d I II Cumene D I II Cyclohexane D I II Cyclohexanol D IIIA II Cyclohexanone D II II Cyclohexene D I II Cyclopropane D d I II p-cymene D II II Decene D II n-decaldehyde C IIIA 0.09 n-decanol D IIIA Decyl Alcohol D IIIA Diacetone Alcohol D IIIA Di-Isobutylene D d I Di-Isobutyl Ketone D II o-dichlorobenzene D IIIA II 1,4-Dichloro-2,3 Epoxybutane D d I II 1,1-Dichloroethane D I II 1,2-Dichloroethylene D I II 1,1-Dichloro-1- Nitroethane C IIIA ,3-Dichloropropene D I Dicyclopentadiene C I II Diethylamine C d I II Diethylaminoethanol C IIIA II Diethyl Benzene D II

8 National Fire Protection Association Report of /28/ :36 PM Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Vapor Density (Air = 1) Vapor Pressure b (mm Hg) Diethyl Ether (Ethyl Ether) C d I II Diethylene Glycol Monobutyl Ether C IIIA Diethylene Glycol Monomethyl Ether C IIIA n-n-dimethyl Aniline C IIIA Dimethyl Formamide D II II Dimethyl Sulfate D IIIA Dimethylamine C GAS II 2,2-Dimethylbutane D g I ,3-Dimethylbutane D g I 396 3,3-Dimethylheptane D g I ,3-Dimethylhexane D g I 438 2,3-Dimethylpentane D g I Di-N-Propylamine C I II 1,4-Dioxane C d I II Dipentene D II II Dipropylene Glycol Methyl Ether C IIIA Diisopropylamine C GAS II Dodecene D IIIA Epichlorohydrin C d I Ethane D d GAS II Ethanol D d I II Ethylamine D d I Ethylene C d GAS II Ethylenediamine D d I Ethylenimine C d I Ethylene Chlorohydrin D IIIA Ethylene Dichloride D d I Cla Zo Gro Ethylene Glycol Monoethyl Ether Acetate Ethylene Glycol Monobutyl Ether Acetate Ethylene Glycol Monobutyl Ether Ethylene Glycol Monoethyl Ether Ethylene Glycol Monomethyl Ether C II II C IIIA C IIIA C II D II

9 National Fire Protection Association Report of /28/ :36 PM Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Vapor Density (Air = 1) Vapor Pressure b (mm Hg) Ethylene Oxide B(C) d,e I II 2-Ethylhexaldehyde C II Ethylhexanol D IIIA Ethylhexyl Acrylate D IIIA Ethyl Acetate D d I II Ethyl Acrylate (Inhibited) D d I II Ethyl Alcohol D d I II Ethyl Sec-Amyl Ketone D II 59 Ethyl Benzene D I Ethyl Butanol D II Ethyl Butyl Ketone D II Ethyl Chloride D GAS Ethyl Formate D GAS II Ethyl Mercaptan C d I II n-ethyl Morpholine C I Ethyl-3-Propyl Acrolein C IIIA Ethyl Silicate D II 7.2 Formaldehyde (Gas) B GAS II Formic Acid D II II Fuel Oil D II or IIIA k 38 72k Fuel Oil 2 II or IIIA k 52 96k 257 Fuel Oil 6 IIIA or IIIB k k Furfural C IIIA Furfuryl Alcohol C IIIA Gasoline D d I n-heptane D d I II n-heptene D g I n-hexane D d,g I II Hexanol D IIIA II 2-Hexanone D I Hexene D I sec-hexyl Acetate D II Hydrazine C II Hydrogen B d GAS II Hydrogen Cyanide C d GAS II Hydrogen Selenide C I 7793 Cla Zo Gro

10 National Fire Protection Association Report of /28/ :36 PM Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Vapor Density (Air = 1) Vapor Pressure b (mm Hg) Cla Zo Gro Hydrogen Sulfide C d GAS II Isoamyl Acetate D I Isoamyl Alcohol D II II Isobutane D g GAS II Isobutyl Acetate D d I Isobutyl Acrylate D I Isobutyl Alcohol D d I II Isobutyraldehyde C GAS II Isodecaldehyde C IIIA Isohexane D g II Isopentane D g Isooctyl Aldehyde C II Isophorone D Isoprene D d I Isopropyl Acetate D I Isopropyl Ether D d I II Isopropyl Glycidyl Ether C I Isopropylamine D GAS Kerosene D II II Liquefied Petroleum Gas D I 405 Mesityl Oxide D d I Methane D d GAS II Methanol D d I II Methyl Acetate D GAS II Methyl Acrylate D GAS II Methyl Alcohol D d I II Methyl Amyl Alcohol D II II Methyl Chloride D GAS II Methyl Ether C d GAS II Methyl Ethyl Ketone D d I II Methyl Formal C d I Methyl Formate D GAS II 2-Methylhexane D g I 280 Methyl Isobutyl Ketone D d I Methyl Isocyanate D GAS II Methyl Mercaptan C GAS Methyl Methacrylate D I II Methyl N-Amyl Ketone D II

11 National Fire Protection Association Report 0 of 41 1/28/ :36 PM Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Vapor Density (Air = 1) Methyl Tertiary Butyl Ether D I Methyloctane Methylpropane D g I Vapor Pressure b (mm Hg) Methyl-1-Propanol D d I II Methyl-2-Propanol D d I Cla Zo Gro 2-Methyl-5-Ethyl Pyridine D Methylacetylene C d I Methylacetylene C I II Propadiene Methylal C I Methylamine D GAS II 2-Methylbutane D g Methylcyclohexane D I Methylcyclohexanol D Methycyclohexanone D II Methylheptane D g Methylhexane D g Methylpentane D g Methylpropane D g I Methyl-1-Propanol D d I Methyl-2-Propanol D d I Methyloctane D g Methyloctane D g Methyloctane D g Monoethanolamine D II Monoisopropanolamine D Monomethyl Aniline C Monomethyl Hydrazine C I Morpholine C d II II Naphtha (Coal Tar) D II II Naphtha (Petroleum) D d,i I II Neopentane D g Nitrobenzene D II Nitroethane C I II Nitromethane C I II 1-Nitropropane C I II 2-Nitropropane C d I n-nonane D g I II

12 National Fire Protection Association Report 1 of 41 1/28/ :36 PM Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Nonene D I Vapor Density (Air = 1) Vapor Pressure b (mm Hg) Nonyl Alcohol D II n-octane D d,g I II Octene D I n-octyl Alcohol D II n-pentane D d,g I II 1-Pentanol D d I II 2-Pentanone D I II 1-Pentene D I Pentene D I Pentyl Acetate D I Phenylhydrazine D Process Gas > 30% H2 B j GAS Propane D d GAS II 1-Propanol D d I II 2-Propanol D d I II Propiolactone D Propionaldehyde C I II Propionic Acid D II II Propionic Anhydride D n-propyl Acetate D I II n-propyl Ether C d I Propyl Nitrate B d I Propylene D d GAS II Propylene Dichloride D I II Propylene Oxide B(C) d,e I II Pyridine D d I II Styrene D d I II Tetrahydrofuran C d I II Tetrahydronaphthalene D IIIA Tetramethyl Lead C II Toluene D d I II n-tridecene D IIIA Triethylamine C d I II Triethylbenzene D ,2,3-Trimethylbutane D g 442 2,2,4-Trimethylbutane D g 407 2,2,3-Trimethylpentane D g 396 Cla Zo Gro

13 National Fire Protection Association Report 2 of 41 1/28/ :36 PM Chemical CAS No. Class I Division Group Type a Flash Point ( C) AIT ( C) %LFL %UFL Vapor Density (Air = 1) Vapor Pressure b (mm Hg) 2,2,4-Trimethylpentane D g 415 II 2,3,3-Trimethylpentane D g 425 Tripropylamine D II II Turpentine D I n-undecene D IIIA Unsymmetrical Dimethyl Hydrazine C d I II Valeraldehyde C I Vinyl Acetate D d I II Vinyl Chloride D d GAS II Vinyl Toluene D Vinylidene Chloride D I II Xylene D d I II Xylidine C IIIA a Type is used to designate if the material is a gas, flammable liquid, or combustible liquid. (See and ) b Vapor pressure reflected in units of mm Hg at 77 F (25 C) unless stated otherwise. c Class I, Zone Groups are based on IEC , 1996 IEC TR , Explosive atmospheres Part 20-1:Material characteristics for gas and vapor classification Test methods and data, which contains additional data on MESG and group classifications. d Material has been classified by test. e Where all conduit runs into explosionproof equipment are, the conduit is provided with explosionproof seals installed within 18 in. (450 mm) of the enclosure, equipment for the group classification shown in parentheses is permitted. f For classification of areas involving ammonia, see ASHRAE 15, Safety Standard for Refrigeration Systems, and CGA G2.1, Safety Requirements for the Storage and Handling of Anhydrous Ammonia. g Commercial grades of aliphatic hydrocarbon solvents are mixtures of several isomers of the same chemical formula (or molecular weight). The autoignition temperatures (AIT) of the individual isomers are significantly different. The electrical equipment should be suitable for the AIT of the solvent mixture. (See A ) h Certain chemicals have characteristics that require need safeguards beyond those required necessary for any of the above groups. Carbon disulfide is one of these chemicals because of its low autoignition temperature and the small joint clearance necessary to arrest its flame propagation. i Petroleum naphtha is a saturated hydrocarbon mixture whose boiling range is 68 F to 275 F (20 C to 135 C). It is also known as benzine, ligroin, petroleum ether, and naphtha. j Fuel and process gas mixtures found by test not to present hazards similar to those of hydrogen may can be grouped based on the test results. k Liquid type and flash point vary due to regional blending differences. Cla Zo Gro Submitter Information Verification Submitter Full Name: Eric Nette

14 National Fire Protection Association Report 3 of 41 1/28/ :36 PM Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Oct 02 13:50:30 EDT 2015 Committee Statement Committee Statement: Response Message: Updated Table note c by updating reference to IEC The flashpoint for Ethane has been updated to the correct value of -135 instead of -29 as shown in SDS. Public Comment No. 2-NFPA [Section No [Excluding any Sub-Sections]] Ballot Results This item has passed ballot 24 Eligible Voters 4 Not Returned 17 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Saverino, Joseph V. Sierra, Rodolfo N. Ural, Erdem A. Zewe, Jack H. Affirmative All Ankele, Donald W. Biradar, Babanna Brown, Ronald M. Cadd, Jonathan L. Chantler, Paul Cirelli, Chris Cusimano, Alberto DeFelice, Jr., Frank C. Egloff, Matt Garfunkel, Felix J. Jamison, Jr., Jack E. Lawrence, Jr., William G.

15 National Fire Protection Association Report 4 of 41 1/28/ :36 PM Malanga, Robert Morrison, Adam Myers, Timothy J. Stallcup, James G. Wechsler, David B. Affirmative with Comment Fiske, William T. IEC was correctly added to Note c to Table 4.4.2; however, IEC TR was not deleted. The TR should be deleted, as it was superseded by IEC , that has in turn been superseded by IEC Rodgers, Samuel A. It has come to my attention that the 490 C AIT value for ethylene listed in this table is from the 1950 s reported by Zebatakis and Kuchta. This should also be updated to a lower value of 440 C, as shown in IEC as a result of changes in test methods that increased the test volume. Negative with Comment Cawthon, John H. Wording need not be changed.

16 National Fire Protection Association Report 5 of 41 1/28/ :36 PM Second Revision No. 4-NFPA [ Section No ] 5.10 Classification Diagrams for Class I, Divisions.

17 National Fire Protection Association Report 6 of 41 1/28/ :36 PM Most diagrams in Section 5.10 and Section 5.11 include tables of suggested applicability and use check marks to show the ranges of process equipment size, pressure, and flow rates. (See Table ) Unless otherwise stated, these diagrams assume that the material being handled is a flammable liquid. Table 5.10 provides a summary of where each diagram is intended to apply. Class I, Division diagrams include Figure (a) through Figure Table 5.10 Matrix of Diagrams Versus Material/Property/Application Figure Number Division for Class I Zone Special Condition VD > 1 VD < 1 Cryogenic Indoor Indoor, Poor Ventilation Outdoor Above Grade (a) (a) X X X (b) (b) X X X (c) (c) X X X (d) (d) X X X (e) (e) X X X (f) (f) X X X (g) (g) X X X (h) (h) X X X (i) (i) X X X (j) (j) X X X (k) (k) X X X X (l) (l) X X X X (m) (m) X X X X (n) (n) X X X X (a) (a) X X X X (b) (b) X X X X (a) (a) Product dryer FL X X X (b) (b) Filter press FL X X (a) (a) Storage tank (b) (b) (c) (c) (d) (d) (e) (e) Tank car loading Tank car loading Tank truck loading Tank car loading/tank truck loading Tank car loading/tank truck loading Drum filling station Emergency basin A Gra FL X X FL X X FL X X X FL X X X FL X X X FL X X X FL X X X FL X X X

18 National Fire Protection Association Report 7 of 41 1/28/ :36 PM Figure Number for Class I Division Zone Special Condition VD > 1 VD < 1 Cryogenic Indoor Indoor, Poor Ventilation Outdoor Above Grade A Gra (a) (a) Liquid H 2 storage X X X X X X (b) (b) Gaseous H 2 storage (c) (d) (e) (c) (d) (e) Liquid Hydrogen Storage Tank and Vaporizer (parts of system containing liquid hydrogen) Gaseous Hydrogen Vent Stack Gaseous Hydrogen Receivers (a) (a) Compressor shelter (b) (b) Compressor shelter (a) (a) Cryogenic storage (b) (b) Cryogenic storage (c) (c) Cryogenic storage X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X LNG X X X LNG X X X LNG X Marine terminal Compressed Gas Cylinders lighter than or equal to air, including hydrogen) Compressed Gas Cylinders (heavier than air) FL/LFG X X X X X X X X X X X FL: Flammable liquid. LFG: Liquefied flammable gas. LNG: Liquefied natural gas. X: Diagram applies. L: Large. M: Moderate. S: Small. H: High.

19 National Fire Protection Association Report 8 of 41 1/28/ :36 PM Indoor and Outdoor Process-Flammable Liquids.

20 National Fire Protection Association Report 9 of 41 1/28/ :36 PM [See Figure (a) through Figure (n).] Figure (a) Leakage Located Outdoors, at Grade. The material being handled is a flammable liquid. Figure (b) Leakage Located Outdoors, Above Grade. The material being handled is a flammable liquid. Figure (c) Leakage Located Indoors, at Floor Level. Adequate ventilation is provided. The material being handled is a flammable liquid. Figure (d) Leakage Located Indoors, Above Floor Level. Adequate ventilation is provided. The material being handled is a flammable liquid. Figure (e) Leakage Located Indoors, at Floor Level, Adjacent to an Opening in an Exterior Wall. Adequate ventilation is provided. The material being handled is a flammable liquid.

21 National Fire Protection Association Report 0 of 41 1/28/ :36 PM Figure (f) Leakage Located Indoors, at Floor Level, Adjacent to an Opening in an Exterior Wall. Ventilation is not adequate. The material being handled is a flammable liquid. Figure (g) Leakage Located Outdoors, at Grade. The material being handled is a flammable liquid. Figure (h) Leakage Located Outdoors, Above Grade. The material being handled is a flammable liquid. Figure (i) Leakage Located Indoors, Adjacent to an Opening in an Exterior Wall. Ventilation is not adequate. The material being handled is a flammable liquid.

22 National Fire Protection Association Report 1 of 41 1/28/ :36 PM Figure (j) Leakage Located Indoors, Adjacent to an Opening in an Exterior Wall. Adequate ventilation is provided. The material being handled is a flammable liquid. Figure (k) Leakage, Located Both at Grade and Above Grade, in an Outdoor Process Area. The material being handled is a flammable liquid. Figure (l) Multiple Sources of Leakage, Located Both at Grade and Above Grade, in an Outdoor Process Area. The material being handled is a flammable liquid. Figure (m) Multiple Sources of Leakage, Located Both at and Above Grade, in an Outdoor Process Area. The material being handled is a flammable liquid.

23 National Fire Protection Association Report 2 of 41 1/28/ :36 PM Figure (n) Multiple Sources of Leakage, Located Both at and Above Floor Level, in an Adequately Ventilated Building. The material being handled is a flammable liquid Outdoor Process Flammable Liquid, Flammable Gas, Compressed Flammable Gas, or Cryogenic Liquid. [See Figure (a) and Figure (b).] Figure (a) Leakage Located Outdoors, at Grade. The material being handled could be a flammable liquid, a liquefied or compressed flammable gas, or a flammable cryogenic liquid. Figure (b) Leakage Located Outdoors, Above Grade. The material being handled could be a flammable liquid, a liquefied or compressed flammable gas, or a flammable cryogenic liquid.

24 National Fire Protection Association Report 3 of 41 1/28/ :36 PM Product Dryer and Plate and Frame Filter Press Solids Wet with Flammable Liquids. [See Figure (a) and Figure (b).] Figure (a) Product Dryer Located in an Adequately Ventilated Building. The product dryer system is totally enclosed. The material being handled is a solid wet with a flammable liquid. Figure (b) Plate and Frame Filter Press. Adequate ventilation is provided. The material being handled is a solid wet with a flammable liquid.

25 National Fire Protection Association Report 4 of 41 1/28/ :36 PM Storage Tanks and Tank Vehicles Flammable Liquids.

26 National Fire Protection Association Report 5 of 41 1/28/ :36 PM [See Figure (a) through Figure (e).] Figure (a) Product Storage Tank Located Outdoors, at Grade. The material that is being stored is a flammable liquid. Figure (b) Tank Car Loading and Unloading via a Closed Transfer System. Material is transferred only through the dome. The material being transferred is a flammable liquid. Figure (c) Tank Car Loading and Unloading via a Closed Transfer System. Material is transferred through the bottom fittings. The material being transferred is a flammable liquid. Figure (d) Tank Truck Loading and Unloading via a Closed Transfer System. Material is transferred through the bottom fittings. The material being transferred is a flammable liquid. Figure (e) Tank Car (or Tank Truck) Loading and Unloading via an Open Transfer System. Material is transferred either through the dome or the bottom fittings. The material being transferred is a flammable liquid.

27 National Fire Protection Association Report 6 of 41 1/28/ :36 PM Tank Vehicle Flammable Liquefied Gas, Flammable Compressed Gas, or Flammable Cryogenic Liquid. (See Figure ) Figure Tank Car (or Tank Truck) Loading and Unloading via a Closed Transfer System. Material is transferred only through the dome. The material being transferred may be a liquefied or compressed flammable gas or a flammable cryogenic liquid Indoor or Outdoor Drum Filling Station Flammable Liquids. (See Figure ) Figure Drum Filling Station Located Either Outdoors or Indoors in an Adequately Ventilated Building. The material being handled is a flammable liquid.

28 National Fire Protection Association Report 7 of 41 1/28/ :36 PM Emergency Impounding Basins, Emergency Drainage Ditches, or Oil Water Separators Flammable Liquids. (See Figure ) Figure Emergency Impounding Basin or Oil Water Separator and an Emergency or Temporary Drainage Ditch or Oil Water Separator. The material being handled is a flammable liquid.

29 National Fire Protection Association Report 8 of 41 1/28/ :36 PM Storage of Liquid or Gaseous Hydrogen.

30 National Fire Protection Association Report 9 of 41 1/28/ :36 PM [See Figure (a) and Figure (b).] Figure (a) Liquid Hydrogen Storage Located Outdoors or Indoors in an Adequately Ventilated Building. This diagram applies to liquid hydrogen only. Figure (b) Gaseous Hydrogen Storage Located Outdoors or Indoors in an Adequately Ventilated Building. This diagram applies to gaseous hydrogen only. Figure (c) Liquid Hydrogen Storage Tank and Vaporizer (parts of system containing liquid hydrogen). Figure (d) Gaseous Hydrogen Vent Stack. Figure (e) Gaseous Hydrogen Receivers

31 National Fire Protection Association Report 0 of 41 1/28/ :36 PM Compressor Shelters Lighter-than-Air Gas. [See Figure (a) and Figure (b).] Figure (a) Adequately Ventilated Compressor Shelter. The material being handled is a lighter-than-air gas. Figure (b) Inadequately Ventilated Compressor Shelter. The material being handled is a lighter-than-air gas.

32 National Fire Protection Association Report 1 of 41 1/28/ :36 PM Storage Tanks for Cryogenic Liquids. [See Figure (a), Figure (b), and Figure (c).] Figure (a) Tank for the Storage of Cryogenic and Other Cold Liquefied Flammable Gases. Dike height less than distance from container to dike (H < x). [59A: Figure (b).] Figure (b) Tank for the Storage of Cryogenic and Other Cold Liquefied Flammable Gases. Dike height greater than distance from container to dike (H > x). [59A: Figure (c)] Figure (c) Tank for the Storage of Cryogenic and Other Cold Liquefied Flammable Gases. Container with liquid level below grade or top of dike. [59A: Figure (d).] Outdoor Handling Liquefied Natural Gas or Other Cryogenic Flammable Gas. (See Figure ) Figure Source of Leakage from Equipment Handling Liquefied Natural Gas or Other Cold Liquefied Flammable Gas and Located Outdoors, at or Above Grade.

33 National Fire Protection Association Report 2 of 41 1/28/ :36 PM Indoor Handling Liquefied Natural Gas or Other Cryogenic Flammable Gas. (See Figure ) Figure Source of Leakage from Equipment Handling Liquefied Natural Gas or Other Cold Liquefied Flammable Gas and Located Indoors in an Adequately Ventilated Building Routinely Operating Bleeds Liquefied Natural Gas or Other Cryogenic Flammable Gas. (See Figure ) Figure Classified Zones around Liquefied Natural Gas Routinely Operating Bleeds, Drips, Vents, and Drains Both Outdoors, at or Above Grade, and Indoors, in an Adequately Ventilated Building. This diagram also applies to other cold liquefied flammable gases. (Source: Table of NFPA 59A.)

34 National Fire Protection Association Report 3 of 41 1/28/ :36 PM Marine Terminal Flammable Liquids. (See Figure ) Figure Classified Locations at a Marine Terminal Handling Flammable Liquids or Liquefied Flammable Gases; Includes the Area Around the Stored Position of Loading Arms and Hoses Compressed Gas Cylinders (Lighter than or Equal to Air, including hydrogen). (See Figure ) Figure Compressed Gas Cylinders (lighter than or equal to air, including hydrogen) Compressed Gas Cylinders (Heavier Than Air). (See Figure ) Figure Compressed Gas Cylinders (heavier than air). Supplemental Information File Name NFPA_497_Figure_Updates_per_NFPA_ _EN_ pptx Figures_for_497_SR-4_EN_ docx Description New Figures as attached in Presentation. Please note numbering has changed from the old edition 5.9 is now 5.10 and 5.10 is now the figures have been extracted from the ppt file into a word file. Submitter Information Verification Submitter Full Name: Eric Nette Organization: [ Not Specified ] Street Address: City: State:

35 National Fire Protection Association Report 4 of 41 1/28/ :36 PM Zip: Submittal Date: Fri Oct 02 13:23:50 EDT 2015 Committee Statement Committee Statement: Response Message: An update to the figures has been added for Hydrogen and compressed gases by the 497 task group to be in line with the recent update to NFPA 55. Ballot Results This item has passed ballot 24 Eligible Voters 4 Not Returned 18 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Saverino, Joseph V. Sierra, Rodolfo N. Ural, Erdem A. Zewe, Jack H. Affirmative All Ankele, Donald W. Biradar, Babanna Brown, Ronald M. Cadd, Jonathan L. Chantler, Paul Cirelli, Chris Cusimano, Alberto DeFelice, Jr., Frank C. Egloff, Matt Fiske, William T. Garfunkel, Felix J. Jamison, Jr., Jack E. Lawrence, Jr., William G. Malanga, Robert Morrison, Adam Myers, Timothy J. Stallcup, James G.

36 National Fire Protection Association Report 5 of 41 1/28/ :36 PM Wechsler, David B. Affirmative with Comment Cawthon, John H. No comment. Rodgers, Samuel A. Figure for heavier than air compressed gas cylinders is not shown correctly in the ballot. The LHS plan view should show 10 ft Div 2 radius as in the task group presentation voted in committee.

37 Task Group Report on NFPA 497 Figure Updates per NFPA and Gas Cylinders David Wechsler, Jack Jamison, Jonathan Cadd, Erdem Ural, Rob Early

38 Comparison of Editions (H 2 Gas) 2016 edition adds a Div 1 location around vent outlets

39

40 Comparison of Editions (H 2 Liq) 2016 edition clarifies that the locations are evaluated spherically around a leak point and extends PRV vent to include any vents. It also clarifies the area extends from the surface of the equipment all around.

41 Current 5.9.8(a)/5.10.8(a) Current figure is more general and does not specifically include the PRV vent or the fill connection

42 Current 5.9.8(b)/5.10.8(b) Current figure is more general and does not specifically include an area around the closed container or vents from the closed container as in the latest edition

43 Recommendation Retain current 5.9.8/ (a), (b) as general source locations using the 497 understanding of source as any potential leak point Add new 5.9.8/5.10.8(c) Liquid Hydrogen Storage Tank and Vaporizer (parts of system containing liquid hydrogen) Add new 5.9.8/ (d) Gaseous Hydrogen Vent Stack Add new 5.9.8/5.10.8(e) Gaseous Hydrogen Receivers Add new 5.9.x/5.10.x Compressed Gas Cylinders (Lighter than or Equal to Air, including Hydrogen) Add new 5.9.y/5.10.y Compressed Gas Cylinders (Heavier than Air)

44 5.9.8(c) Liquid Hydrogen Storage Tank and Vaporizer (parts of system containing liquid hydrogen) For (c) replace Division with Zone

45 Figure (c) Part 1 Liquid Hydrogen Vent Stack Division 1, 3 ft (915 mm) radius Division 2, 25 ft (7.62 m) radius Container Vaporizer Grade Liquid Hydrogen Fill Connection Division 1, 3 ft (915 mm) radius

46 Division 2, 25 ft (7.62 m) radius ogen Vent Stack m) radius Container Vaporizer drogen Fill Connection mm) radius Division 2, 25 ft (7.62 m) radius

47 5.9.8(d) Gaseous Hydrogen Vent Stack For (d) replace Division with Zone

48 Gaseous Hydrogen Vent Stack Division 1, 3 ft (915 mm) radius Division 2, 15 ft (4.57 m) radius Grade

49 5.9.8(e) Gaseous Hydrogen Receivers For (e) replace Division with Zone

50 Division 2, 15 ft (4.57 m) radius

51 Division 2, 15 ft (4.57 m) radius Grade

52 Division 2, 15 ft (4.57 m) radius Grade

53 Compressed Gas Cylinders Low volume cylinder storage also applies to gaseous hydrogen cylinders Cylinders conventionally stored vertically and restrained. Lighter than air cylinder storage leaks are buoyant Heavier than air cylinder storage leaks are jet leaks under significant pressure, so entrainment quickly reduces concentration

54 5.9.x(a) Compressed Gas Cylinders (Lighter than or Equal to Air, including Hydrogen) Condition: Outdoor or Indoor well-ventilated location, secured in vertical position, in-use in single or manifolded configuration For 5.10.x(a) replace Division with Zone

55 Division 2, 15 ft (4.57 m) radius

56 Division 2, 15 ft (4.57 m) radius Grade

57 5.9.x(b) Compressed Gas Cylinders (Heavier than Air) Condition: Outdoor or Indoor well-ventilated location, secured in vertical position, in-use in single or manifolded configuration For 5.10.x(b) replace Division with Zone

58 Division 2, 10 ft (4.57 m) radius

59 Division 2, 3 ft (915 mm) radius 18 in. (457 mm) Grade 10 ft (3.05 m) radius Below grade location such as a sump or trench

60 Backup

61 Division 2, 25 ft (7.62 m) radius Container Vaporizer Grade

62 Division 2, 25 ft (7.62 m) radius Container Vaporizer

63 Lighter than Air

64 Heavier than Air

65 *New* (c) Liquid Hydrogen Storage Tank and Vaporizer (parts of system containing liquid hydrogen) Liquid Hydrogen Vent Stack Division 1, 3 ft (915 mm) radius Division 2, 25 ft (7.62 m) radius Container Vaporizer Grade Liquid Hydrogen Fill Connection Division 1, 3 ft (915 mm) radius

66 Division 2, 25 ft (7.62 m) radius Liquid Hydrogen Vent Stack Division 1, Container Vaporizer Liquid Hydrogen Fill Connection Division 1, 3 ft (915 mm) radius Division 2, 25 ft (7.62 m) radius

67 *New* (d) Gaseous Hydrogen Vent Stack Gaseous Hydrogen Vent Stack Division 1, 3 ft (915 mm) radius Division 2, 15 ft (4.57 m) radius Grade

68 *New* (e) Gaseous Hydrogen Receivers Division 2, 15 ft (4.57 m) radius

69 Division 2, 15 ft (4.57 m) Grade Division 2, 15 ft (4.57 m) Grade

70 *New* Compressed Gas Cylinders (Lighter than or Equal to Air, including Hydrogen) Division 2, 15 ft (4.57 m) radius Division 2, 15 ft (4.57 m) Grade Condition: Outdoor or Indoor well-ventilated location, secured in vertical position, inuse in single or manifolded configuration

71 *New* Compressed Gas Cylinders (Heavier than Air) Division 2, 10 ft (4.57 m) Division 2, 3 ft (915 mm) di 18 in. (457 mm) Grade 10 ft (3.05 m) Below grade location such as a sump or trench Condition: Outdoor or Indoor well-ventilated location, secured in vertical position, inuse in single or manifolded configuration

72 *new* (c) Liquid Hydrogen Storage Tank and Vaporizer (parts of system containing liquid hydrogen) Liquid Hydrogen Vent Stack Zone 1, 3 ft (915 mm) radius Zone 2, 25 ft (7.62 m) radius Container Vaporizer Grade Liquid Hydrogen Fill Connection Zone 1, 3 ft (915 mm) radius

73 Zone 2, 25 ft (7.62 m) radius Liquid Hydrogen Vent Stack Zone 1, Container Vaporizer Liquid Hydrogen Fill Connection Zone 1, 3 ft (915 mm) radius Zone 2, 25 ft (7.62 m) radius

74 5.11.8(d) Gaseous Hydrogen Vent Stack Gaseous Hydrogen Vent Stack Zone 1, 3 ft (915 mm) radius Zone 2, 15 ft (4.57 m) radius Grade

75 5.11.8(e) Gaseous Hydrogen Receivers Zone 2, 15 ft (4.57 m) radius

76 Zone 2, 15 ft (4.57 m) Grade Zone 2, 15 ft (4.57 m) Grade

77 National Fire Protection Association Report 6 of 41 1/28/ :36 PM Second Revision No. 6-NFPA [ New Section after ] Compressed Gas Cylinders (Lighter Than or Equal to Air, Including Hydrogen). (See Figure ) Figure Compressed Gas Cylinders (lighter than or equal to air, including hydrogen) Compressed Gas Cylinders (Heavier than Air). (See Figure ) Figure Compressed Gas Cylinders (heavier than air). Supplemental Information File Name NFPA_497_Figure_Updates_per_NFPA_ _EN_ pptx Figures_for_497_SR-6_EN_ docx Description New Figures as attached in Presentation. Please note numbering has changed from the old edition 5.9 is now 5.10 and 5.10 is now I extracted both figures from the powerpoint file into a word file. Submitter Information Verification Submitter Full Name: Eric Nette Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Oct 02 14:26:36 EDT 2015 Committee Statement Committee Statement: Response Message: An update to the figures has been added for Hydrogen and compressed gases by the 497 task group to be in line with the recent update to NFPA 55.

78 National Fire Protection Association Report 7 of 41 1/28/ :36 PM Ballot Results This item has passed ballot 24 Eligible Voters 4 Not Returned 18 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Saverino, Joseph V. Sierra, Rodolfo N. Ural, Erdem A. Zewe, Jack H. Affirmative All Ankele, Donald W. Biradar, Babanna Brown, Ronald M. Cadd, Jonathan L. Chantler, Paul Cirelli, Chris Cusimano, Alberto DeFelice, Jr., Frank C. Egloff, Matt Fiske, William T. Garfunkel, Felix J. Jamison, Jr., Jack E. Lawrence, Jr., William G. Malanga, Robert Morrison, Adam Myers, Timothy J. Stallcup, James G. Wechsler, David B. Affirmative with Comment Cawthon, John H. No Comment. Rodgers, Samuel A. Figure for heavier than air compressed gas cylinders is not shown correctly in the ballot. The LHS plan view should show 10 ft Zone 2 radius as in the task group presentation voted in committee. This SR-6 or the prior SR-5 should also include the Zone figures for liquid and gaseous hydrogen equivalent to those added for

79 National Fire Protection Association Report 8 of 41 1/28/ :36 PM Divisions. While included in the task group report and word document reference, they are not shown in the SR format.

80 Task Group Report on NFPA 497 Figure Updates per NFPA and Gas Cylinders David Wechsler, Jack Jamison, Jonathan Cadd, Erdem Ural, Rob Early

81 Comparison of Editions (H 2 Gas) 2016 edition adds a Div 1 location around vent outlets

82

83 Comparison of Editions (H 2 Liq) 2016 edition clarifies that the locations are evaluated spherically around a leak point and extends PRV vent to include any vents. It also clarifies the area extends from the surface of the equipment all around.