NFPA 24 Standard for the Installation of Private Fire Service Mains and Their Appurtenances 2019 NFPA
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24-1 Copyright O 2018 National Fire Protection Axsociation° All Rights Reserved. NFPA° 24 Standard for the Installation of Private Fire Service Mains and Their Appurtenances 2019 Edition Ape ws prepared by the Technical Comitt on Priate Water Supply Piping Systms and This edlition of NFPA 24 Standand for thz Installation of Prisxte Fise Servicz Mains and Their Stantards Counil on May 4 2018 with an effective date of May 24 2018 and supersedes all released by the Correlating Committee on Automatic Sprinkler Systems. It was issued by the previous ecditions. This edition of NFPA 24 was approved as an American National Standard on May 24 2018. Origin and Development of NFPA 24 In 1903 the NFPA Comitee on Hose and Hyrants first presented Sperifictions for Mil ad Hs Houss taken substantially from a stanard published by the Eastern Factory Insurance Asociation. This text was revised and adopted in 1904. The NFPA Committee on Feld Practice amended the Specifications in 1926 published as NFPA 25. In 1925 the Comittee on Fiel Practice prepared a Stnde on Outside Protctio Prite Undnground Pping Sstes Supping Wter for Fie Extinuishmen which was adopte by NFPA. It was largely taken from the 1920 edition of the NFPA Automatic Sprinkler Stenderl Section M on Underground Pipes and Fitings. In September 1931 a revision was made with the resulting standard desigmated as NFPA 24. In the 1981 edition the title was changed from Seandrd for Outside Profection to Standerd for thz Installation of Private Fae Servicz Meins and Their Appurtenances. In 1953 on remendation of the Committee on Standpipes and Outside Protection the to standards (NFPA 24 and NFPA 25) were pletely revised and adopted as NFPA 24. Amendments ere ma ladingtsepaateditons in 1955 1959 1962 196 1965 1966 1968 1969 19 1973 1977 1981 1983 and 1987. The 1992 edition included amendments to further delineate the point at which the water supply stops and the fixed fire protection system begins. Minor changes were made concerning special topics such as thrust restraint and equipment provisions in valve pits. The 1995 edition clarified requirements for aboveground and buried piping Revisions were made to provide additional information regarding listing requirements signage valves vave supervision hydrant outlets system atachments piping materials and thrust blocks. User friendllines of the document was also addressed. The 2002 edition represented a plete revision of NFPA 24. Changes included reorganization and editorial modifications to ply with the Manal of Syle for NFPA Technical Cowmitze Documts. Additionally ll of the unerground piping requirements were relocated into a new Chapter 10. The 2007 edition was revised in five major areas: Chapter 10 was updated editorially and minor technical changes were made. Newly established leakage test criteria as wellas updated requirements for thrust blocks and restrained joints were added to Chapter 10. Two annexes were new to this edition: Anex C Rommndd Price for F F esting and Annex D Remmndd Pctifr Mrking ofHydre Thee two annxes were developed hsed on the 2002 edition of NFPA 291. The 2010 edition was revised in three major areas: the provisions for location and identification of fire department connetions vaes controling water suppb and protection of fre service mains entering the building. The 2013 edition of NFPA 24 included clarifications on the requirements for running piping under buildings including annex figures depicting clearances. The Contractors Material and Test NFPA an atial Fr PrttiAiti ar regsteed rmrk of te atilFie PrttiAcitio Qinc Mschsts 9.
24.2 INSTALLATION OF PRIVATE FIRE SERVICE MAINS AND THEIR APPURTENANCES oq ue u p q o a dp e uba d puq pq ad q Certificate for Underground Piping (Figure 10.10.1) was modified to include confimation that the forward flow test of the that permits inspections in accordance with NFPA 25 was also added. NFPA 24 underwent a structural rewrite for the 2016 edition. The hydrant definitions were clarified to describe the type of hydrant in question as opposed to describing when and where they would be used. The vahe arrangement requirements were rewritten forclarity and annex figures aded to provide figures that are consistent with NFPA 13. The title of Chapte 6 was changed from Vales* to “Water Supply Connections" to better describe the material cowered in the chapter. Revisions to Section 6.1 more clearly callout the permitted exceptins toindicating valves an emit nlisted tapping sleee and vale assemblies in connections to municipal water supplies. The center of hose outlet measurements was updated to include clear installation. The steel underground piping references have been removed from the table in Chapter 10 because steel pipe is minimum and maximum values for the location of the outlet along with the appropriate measurement for a hose house ground to transition to aboveground piping. required to be listed other than in the FDC line. A statement also was added to allow underground fttings to be used above The 2019 edlition includes minor changes related to trenching and backfill. Acceptance testing requirements for aboveground piping have been included. The standard has also been revised to clarify the unacceptable use of steel piping for underground service. 2019Edition
NFPA 24 2019 民用消防主机及其附属设备安装标准 Standard forthe Installation of PrivateFire Service Mains andTheir Appurtenances.pdf
