1、Stress Intensification Factors(i-Factors),Flexibility Factors(k-Factors),and Their Determination for Metallic Piping ComponentsASME Code for Pressure Piping,B31AN AM E R IC AN NAT IO NAL STANDARDASME B31J-2017Revision of ASME B31J-2008(R2013)ASME B31J-2017Revision of ASME B31J-2008(R2013)Stress Inte
2、nsification Factors(i-Factors),Flexibility Factors(k k-Factors),and Their Determination for Metallic Piping ComponentsASME Code for Pressure Piping,B31AN AMERICAN NATIONAL STANDARDxDate of Issuance:June 16,2017This Standard will be revised when the Society approves the issuance of a new edition.ASME
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11、out the prior written permission of thepublisher.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2017 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.vCommittee Roster.viCorrespondence With the B31 Committ
12、ee.viiIntroduction.ix1General.12Definitions.13Document Contents.1Nonmandatory AppendicesAStress Intensification Factor(SIF)Test Procedure.17BTest Method for Determining Branch Connection Flexibility Factors.25CUse of Branch Connection Flexibility Factors in Piping System Analysis.34DSustained Load T
13、est Procedure.38Figures1-1Orientations for Sketches 2.1 Through 2.6 of Table 1-1.131-2Orientations for Bends.141-3Branch Dimensions.141-4Flexibility and Stress Intensification Factors for Bends and Miters.151-5Flanged End Corrections for Bends and Miters.151-6Flexibility Element Locations.161-7Fille
14、t Weld Contours.16A-1.1-1Representative Cantilever Test Arrangements.17A-1.3-1Displacement and Force or Moment Recorded During Loading and Unloading of a Test Specimen inBoth Positive and Negative Directions,With Linear Displacement.19B-1-1Branch Connection Specimen.25B-1-2Multiple k-Factor Tests on
15、 Single Assembled Position.26B-2-1Example Flexibility Factor Branch Load Assembly Orientation.27B-4.4-1Detailed Beam Model for Through-Branch k-Factor Test.29B-4.4-2Beam Model.29B-4.6-1Load-Displacement Diagram.31B-6-1Unreinforced Branch Connection With(Left)and Without Ovalization Restraint Plates
16、in Place.32C-2-1Rotational Stiffness Location Between Two Nodes.35C-2-2Branch Connection In-Plane Direction.35C-2-3Branch Connection Flexibilities Used on Branch Side Only.36C-2-4Branch Connection Flexibilities Used on Run Side Only.36C-2-5Branch and Run Flexibilities Used Together(In Series).36C-2-6Rotational Flexibility Definitions.37iiiC-2-7Branch and Run SIF and k-Factor Intersection Orientations.37D-1-1Standard Sustained Load Setup.38D-1-2Bend Sustained Load Setup.39D-2-1Load-Displacement D
