NFPA 54-2015 National Fuel Gas Code (Effective Date 9 3 2014).pdf

1、NFPA54 ANSI Z223.1 National Fuel Gas Code An American National Standard 2015 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization 1/14ISBN: 978-145590891-2 (Print)ISBN: 978-145590924-7 (PDF)IMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPASTANDAR

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29、ards can be viewed at no cost at www.nfpa.org/freeaccess.Copyright 2014 National Fire Protection Associationand the American Gas Association.All Rights Reserved.NFPA542015ANSI Z223.12015National Fuel Gas Code2015 EditionThis edition of ANSI Z223.1/NFPA 54, National Fuel Gas Code, was prepared by the

30、 TechnicalCommittee on National Fuel Gas Code and acted on by NFPA at its June Association TechnicalMeeting held June 912, 2014, in Las Vegas, NV. It was issued by the Standards Council on August14, 2014, with an effective date of September 3, 2014, and supersedes all previous editions.This edition

31、of ANSI Z223.1/NFPA 54 was approved as an American National Standard onSeptember 3, 2014. THE ANSI designation is Z223.1-2015 approved on August 8, 2014. TheNFPA designation is NFPA 54-2015.Origin and Development of ANSI Z.223.1/NFPA 54This code offers criteria for the installation and operation of

32、gas piping and gas equipmenton consumers premises. It is the cumulative result of years of experience of many individualsand many organizations acquainted with the installation of gas piping and equipment de-signed for utilization of gaseous fuels. It is intended to promote public safety by providin

33、grequirements for the safe and satisfactory utilization of gas.Changes in this code can become necessary from time to time. When any revision is deemedadvisable, recommendations should be forwarded to the Secretary, Accredited Standards Com-mittee Z223, 400 N. Capitol St. NW, Washington, DC 20001, a

34、nd the Secretary, Standards Council,National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.Prior to 1974, the following three codes covered the installation of gas piping and appliances:(1) American National Standard Installation of Gas Appliances and Gas Piping, ANSI Z21.3

35、0(NFPA 54)(2) Installation of Gas Piping and Gas Equipment on Industrial Premises and Certain Other Premises,ANSI Z83.1 (NFPA 54A)(3) Fuel Gas Piping, ASME B31.2The first edition of the code was issued in 1974. It combined the requirements of the threepredecessor documents. The American Gas Associat

36、ion and the National Fire ProtectionAssociation have continued co-sponsorship of the code following the first edition.The second edition of the code, incorporating pertinent portions of B31.2, was issued in 1980,and reorganized the code to the current format. The third, fourth, fifth, sixth, and sev

37、enth edi-tions were issued in 1984, 1988, 1992, 1996, and 1999, respectively. The scope of the code wasexpanded in 1988 to include piping systems up to and including 125 psi (862 kPa).The 2002 edition revised the requirements for air for combustion and ventilation to rec-ognize changes in building c

38、onstruction practices. Also, coverage of sizing of gas pipingsystems was updated.The 2006 edition incorporated expanded steel, copper, and polyethylene pipe sizingtables. Requirements for appliance shutoff valves were revised to allow manifold systems withall shutoff valves in one location up to 50

39、ft (15 m) from the most remote appliance, and thechapters were reorganized by application.Changes to the 2009 edition included allowing press-connect fittings for gas piping sys-tems, new requirements for bonding of CSST piping systems, expanded CSST sizing tables torecognize additional available si

40、zes, new coverage of outdoor decorative appliances, and anew requirement to seal the annular space around the side wall vent penetrations.In the 2012 edition, Section 8.3 on purging of fuel gas piping was extensively revised torequire outdoor purging of piping larger than 2 in. nominal pipe size or

41、piping operating atpressures above 2 psig (14 kPa) and monitoring of the outdoor purging point. Pipe 2 in.(50 mm) or smaller or with an operating pressure of 2 psig (14 kPa) or less can be purgedindoors through a burner, with a gas detector, or by using written procedures.541ANSI Z223.11NFPA and Nat

42、ional Fire Protection Association are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169.The 2015 edition includes further revisions to bonding requirements for CSST, as well as a complete revision of theoverpressure protection requirements.The bonding req

43、uirements for CSST were revised so that the bonding connection can be placed on any metallicfitting in the piping system as long as the bonding jumper does not exceed 75 ft in length. In addition, devices used forthe bonding connection must be listed to ANSI/UL 467.The overpressure protection requir

44、ements in Section 5.9 were completely rewritten so that devices covered wereentirely within the scope of NFPA 54. The exceptions were further restricted so that overpressure is now required onany system containing an appliance with a maximum inlet pressure of 14 in. w.c. that is supplied with gas at

45、 the pointof delivery at a pressure greater than 2 psig.The 2015 edition also includes expanded requirements for corrosion protection of underground steel piping in7.1.3, new requirements on the drilling and tapping of piping and fittings in 5.6.8.4, an update of all flange and gasketcoverage in 5.6

46、.10 and 5.6.11, and a new prohibition on PVC and CPVC gas pressure piping in 5.6.4.1.3.Finally, Annex G, Recommended Procedure for Safety Inspection of an Existing Appliance Installation, was expandedand revised to reflect modern appliances and test methods.542 NATIONAL FUEL GAS CODE ANSI Z223.12201

47、5 EditionTechnical Committee on National Fuel Gas CodeJoint Listing of NFPA 54 and ASC Z223 CommitteesThomas R. Crane, ChairCrane Engineering, MN SE/SEPaul W. Cabot, Nonvoting SecretaryAmerican Gas Association, DC IMRep. American Gas AssociationHugo Aguilar, International Association of Plumbing(2)

48、reel-type oven,an oven employing trays that are moved by mechanicalmeans; or (3) sectional oven, an oven composed of one ormore independently heated cavities.3.3.5.5.2 Gas Counter Appliance. An appliance such as agas coffee brewer and coffee urn and any appurtenant wa-ter heating appliance, food and

49、 dish warmer, hot plate, andgriddle.3.3.5.5.3 Gas Deep Fat Fryer. An appliance, including acooking vessel in which oils or fats are placed to such adepth that the cooking food is essentially supported by dis-placement of the cooking fluid or a perforated containerimmersed in the cooking fluid rather than by the bottom ofthe vessel, designed primarily for use in hotels, restaurants,clubs, and similar institutions.3.3.5.5.4 Gas Range. A self-contained gas range providingfor cooking, roasting, baking, or broiling, or any combina-tion of these functions, and not designed s