1、ASME B31.8-2016(Revision of ASME B31.8-2014)Gas Transmissionand DistributionPiping SystemsASME Code for Pressure Piping,B31AN INTERNATIONAL PIPING CODEThe American Society ofMechanical EngineersASME B31.8-2016(Revision of ASME B31.8-2014)Gas Transmissionand DistributionPiping SystemsASME Code for Pr
2、essure Piping,B31AN INTERNATIONAL PIPING CODEThe American Society ofMechanical EngineersTwo Park AvenueNew York,.NY1O016UsADate of Issuance:October 19,2016The next edition of this Code is scheduled for publication in 2018.This Code will become effective6 months after the Date of Issuance.ASME issues
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13、dPrinted in U.S.A.CONTENTSForeword.viniCommittee Roster.XIntroduction.xivSummary of ChangesxviGeneral Provisions and Definitions.18011802Scope and Intent1803Piping Systems Definitions.2804Piping Systems Component Definitions.805Design,Fabrication,Operation,and Testing Terms andDefinitions.3806Qualit
14、y Assurance.12807Training and Qualification of Personnel.12Chapter IMaterials and Equipment.14810Materials and Equipment.14811Qualification of Materials and Equipment14812Materials for Use in Low-Temperature Applications.14813Marking.15814Material Specifications.15815Equipment Specifications.16816Tr
15、ansportation of Line Pipe.16817Conditions for the Reuse of Pipe.16Table817.1.3-1Tensile Testing17Chapter llWelding19820Welding19821General19822Preparation for Welding.19823Qualification of Procedures and Welders.19824Preheating.20825826Stress Relieving.0Weld Inspection Requirements.21827Repair or Re
16、moval of Defective Welds in Piping Intendedto Operate at Hoop Stress Levels of 20%or More ofthe Specified Minimum Yield Strength.22Chapter IllPiping System Components and Fabrication Details.3830Piping System Components and Fabrication Details.2831Piping System Components.23832Expansion and Flexibil
17、ity.0833Design for Longitudinal Stress.31834Supports and Anchorage for Exposed Piping.33835Anchorage for Buried Piping4Tables831.4.2-1Reinforcement of Welded Branch Connections,SpecialRequirements,28832.2-1Thermal Expansion or Contraction of PipingMaterials.30i进832.5-1Modulus of Elasticity for Carbo
18、n and Low AlloySeel,31Chapter IVDesign,Installation,and Testing.35840Design,Installation,and Testing.35841Steel Pipe37842Other Materials。1843Compressor Stations.58844Pipe-Type and Bottle-Type Holders.845Control and Limiting of Gas Pressure.62846Valves847Vaults6848CustomersMeters and Regulators.849Ga
19、s Service Lines.71Tables841.1.6-1Basic Design Factor,F.39841.1.6-2Design Factors for Steel Pipe Construction.40841.1.7-1Longitudinal Joint Factor,E.841.1.8-1Temperature Derating Factor,T,for Steel Pipe.41841.1.11-1Pipeline Cover Requirements.43841.2.3-1Pipeline Field Cold Bend Requirements.45841.3.2
20、-1Test Requirements for Steel Pipelines and Mains toOperate at Hoop Stresses of 30%or More of theSpecified Minimum Yield Strength of the Pipe.49841.3.3-1Maximum Hoop Stress Permissible During an Air or Gas.50842.1.1-1Standard Thickness Selection Table for Ductileron Pipe.52842.2.9-1Nominal Values fo
21、r Coefficients of Thermal Expansionof Thermoplastic Pipe Materials.56844.3-1Design Factors,F62844.3-2Minimum Clearance Between Containers and FencedBoundaries,.,.,.,.,.,.,.,.62845.2.2-1Maximum Allowable Operating Pressure for Steel orPlastic Pipelines or Mains.63845.2.3-1Maximum Allowable Operating
22、Pressure for PipelinesOperating at 100 psig(690 kPa)or More.63845.2.3-2Maximum Allowable Operating Pressure for PipelinesOperating at Less Than 100 psig(690 kPa)64Chapter VOperating and Maintenance Procedures.75850Operating and Maintenance Procedures Affecting theSafety of Gas Transmission and DistributionFacilities.75851Pipeline Maintenance.77852Distribution Piping Maintenance。4.4.4。83853Miscellaneous Facilities Maintenance.854Location Class and Changes in Number of BuildingsIntended for Human Occupancy89855Pipeline Service Conversions.98560 dorization.857Uprating.92iv
