ASME_B31J-2017.pdf

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 Intensification 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 issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Interpretations arepublished under http:/go.asme.org/Interpretations.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages to provide corrections toincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.Sucherratashallbeusedon the date posted.The B31 Committee Pages can be found at http:/go.asme.org/B31committee.The associated B31 Committee Pages for eachcode and standard can be accessed from this main page.There is an option available to automatically receive an e-mailnotification when errata are posted to a particular code or standard.This option can be found on the appropriateCommittee Page after selecting“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in thisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industryendorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME proceduresand policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronicretrieval system or otherwise,without 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 Committee.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 Test 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.161-7Fillet 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 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 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