1、Gas Transmission and Distribution Piping SystemsASME Code for Pressure Piping,B31A N I N T E R N AT I O N A L P I P I N G CO D EASME B31.8-2014(Revision of ASME B31.8-2012)ASME B31.8-2014(Revision of ASME B31.8-2012)Gas Transmissionand DistributionPiping SystemsASME Code for Pressure Piping,B31A N I
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12、HANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.viiiCommittee Roster.xIntroduction.xivSummary of Changes.xviGeneral Provisions and Definitions.1801General.1802Scope and Intent.1803Piping Systems Definitions.2804Piping Systems Component Definitions.4805Design,Fabrication,Operati
13、on,and Testing Terms andDefinitions.6806Quality Assurance.12807Training and Qualification of Personnel.12Chapter IMaterials and Equipment.14810Materials and Equipment.14811Qualification of Materials and Equipment.14812Materials for Use in Low-Temperature Applications.15813Marking.15814Material Speci
14、fications.15815Equipment Specifications.16816Transportation of Line Pipe.16817Conditions for the Reuse of Pipe.16Table817.1.3-1Tensile Testing.17Chapter IIWelding.19820Welding.19821General.19822Preparation for Welding.19823Qualification of Procedures and Welders.19824Preheating.20825Stress Relieving
15、.20826Weld Inspection Requirements.21827Repair or Removal of Defective Welds in Piping Intendedto Operate at Hoop Stress Levels of 20%or More ofthe Specified Minimum Yield Strength.22Chapter IIIPiping System Components and Fabrication Details.23830Piping System Components and Fabrication Details.238
16、31Piping System Components.23832Expansion and Flexibility.30833Design for Longitudinal Stress.31834Supports and Anchorage for Exposed Piping.33835Anchorage for Buried Piping.34Tables831.4.2-1Reinforcement of Welded Branch Connections,SpecialRequirements.28832.2-1Thermal Expansion or Contraction of PipingMaterials.30iii832.5-1Modulus of Elasticity for Carbon and Low AlloySteel.31Chapter IVDesign,Installation,and Testing.35840Design,Installation,and Testing.35841Steel Pipe.37842Other Materials.518
