1、Building Services PipingASME Code for Pressure Piping,B31AN AM E R IC A N NAT IO NAL STANDARDASME B31.9-2020(Revision of ASME B31.9-2017)ASME B31.9-2020(Revision of ASME B31.9-2017)BuildingServices PipingASME Code for Pressure Piping,B31AN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016
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12、N SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.viCommittee Roster.viiCorrespondence With the B31 Committee.ixIntroduction.xiSummary of Changes.xiiiChapter IScope and Definitions.1900General.1Chapter IIDesign.9Part 1Conditions and Criteria.9901Design Conditions.
13、9902Design Criteria.9Part 2Pressure Design of Piping Components.11903Criteria for Pressure Design of Piping Components.11904Pressure Design of Components.11Part 3Selection and Limitation of Components.14905Pipe.14906Fittings,Bends,and Intersections.15907Valves.15908Flanges,Blanks,Gaskets,and Bolting
14、.15Part 4Selection and Limitation of Joints.15910Piping Joints.15911Welded Joints.15912Flanged Joints.16913Mechanical and Proprietary Joints.16914Threaded Joints.16915Flared,Flareless,and Compression Joints.16916Bell and Spigot Joints.16917Brazed and Soldered Joints.16Part 5Expansion,Flexibility,and
15、 Support.17919Expansion and Flexibility.17920Loads on Pipe-Supporting Elements.20921Design of Pipe-Supporting Elements.21Part 6Systems.25922Design Requirements Pertaining to Specific Piping Systems.25Chapter IIIMaterials.27923Materials General Requirements.27Chapter IVComponent Requirements and Stan
16、dard Practices.29926Dimensions and Ratings of Components.29iiiChapter VFabrication,Assembly,and Erection.36927Welded Fabrication of Metals.36928Brazing and Soldering of Metals.42929Bending.42930Forming.42931Heat Treatment.42934Fabrication of Nonmetals.43935Assembly.44Chapter VIInspection,Examination,and Testing.46936Inspection and Examination.46937Leak Testing.47Mandatory AppendicesIStress Tables.49IIAllowable Pressures for Nonmetallic,Nonplastic Pressure Piping.58IIIReference Standards.59IVPrep
