1、Summary of Significant Changes in the2021 ASME Boiler and Pressure Vessel CodeASME BPVC.SSC.XI.II.V.IX-2021Section XISection IISection VSection IXASME BPVC.SSC.XI.II.V.IX-2021Summary ofSignificant Changesin the 2021 ASMEBoiler and PressureVessel CodeSections XI,II,V,and IXTwo Park Avenue New York,NY
2、 10016 USAxDate of Issuance:April 23,2021ASME does not issue written replies to inquiries concerning this publication.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Me
3、chanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2021 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSList of Sections in the ASME Boiler and Pressure Vessel Code.ivForeword.vAcknowledgments.viSECTION XI.1Introduction.1Division 1.3Division 2
4、.9SECTION II.10Introduction.10Part A.11Part B.15Part C.18Part DCustomary and Metric.20SECTION V.24Introduction.24Significant Changes.25SECTION IX.30Introduction.30Significant Changes.33iiiLIST OF SECTIONSIN THE ASME BOILER AND PRESSURE VESSEL CODEIRules for Construction of Power BoilersIIMaterials P
5、art A Ferrous Material Specifications Part B Nonferrous Material Specifications Part C Specifications for Welding Rods,Electrodes,and Filler Metals Part D Properties(Customary)Part D Properties(Metric)IIIRules for Construction of Nuclear Facility Components Subsection NCA General Requirements for Di
6、vision 1 and Division 2 Appendices Division 1 Subsection NB Class 1 Components Subsection NCD Class 2 and Class 3 Components Subsection NE Class MC Components Subsection NF Supports Subsection NG Core Support Structures Division 2 Code for Concrete Containments Division 3 Containment Systems for Tra
7、nsportation and Storage of Spent Nuclear Fuel and High-LevelRadioactive Material Division 5 High Temperature ReactorsIVRules for Construction of Heating BoilersVNondestructive ExaminationVIRecommended Rules for the Care and Operation of Heating BoilersVIIRecommended Guidelines for the Care of Power
8、BoilersVIIIRules for Construction of Pressure Vessels Division 1 Division 2 Alternative Rules Division 3 Alternative Rules for Construction of High Pressure VesselsIXWelding,Brazing,and Fusing QualificationsXFiber-Reinforced Plastic Pressure VesselsXIRules for Inservice Inspection of Nuclear Power P
9、lant Components Division 1 Rules for Inspection and Testing of Components of Light-Water-Cooled Plants Division 2 Requirements for Reliability and Integrity Management(RIM)Programs for Nuclear PowerPlantsXIIRules for Construction and Continued Service of Transport TanksXIIIRules for Overpressure Pro
10、tectionivFOREWORDThisbookisacompaniontothe2021ASMEBoilerandPressureVesselCode(BPVC).Itexplainsonlysignificantchangesto Code requirements that have been approved since 2019 and that will be published in the 2021 Edition.It covers thefollowing ASME BPVC Sections:Section XI,Divisions 1 and 2 Section II
11、,Parts A,B,C,and D Section V Section IXForeachoftheaboveSections,anIntroductiondescribesthehistoricalbackground,scopeofcoverage,andcommercialapplication of that Section by industry and government organizations.The list of changes follows the Introduction.The“Explanation”for each change provides the
12、reason for the action and the value to the Code user.The sequence of thechanges follows the order of the Code requirements.vACKNOWLEDGMENTSThis book is the work of the following ASME Standards and Certification(S&C)staff:Daniel Miro-Quesada,S&C Project Engineer,Section XI Colleen E.Rodrigues,S&C Pro
13、ject Engineering Manager,Section II,Parts A,B,and D Erika Lawson,S&C Project Engineer,Section II,Part C;and Section IX Carlton R.Ramcharran,S&C Project Engineering Advisor,Section VASMEPresssOnlineCompanionGuidetotheASMEBoilerandPressureVesselCodes:CriteriaandCommentaryonSelectAspects of the Boiler&
14、Pressure Vessel and Piping Codes(January 2020)provided source material for the Introductionpreceding each list of changes.The complete Guide is available in the ASME Digital Collection athttps:/asmedigitalcollection.asme.org/ebooks/pages/onlinecompanionguide.ASME gratefully acknowledges the members
15、of the following volunteer committees,who are responsible for devel-opment of the ASME Boiler and Pressure Vessel Code Sections noted in this book:BPV Committee on Nuclear Inservice Inspection(XI)BPV Committee on Materials(II)BPV Committee on Nondestructive Examination(V)BPV Committee on Welding,Bra
16、zing,and Fusing(IX)viSECTION XIIntroduction1 DIVISION 1Section XI,Division 1 of the ASME Boiler and Pressure Vessel Code(BPVC)provides requirements for examination,testing,and inspection of components and systems,and repair/replacement activities in light-water cooled nuclearpower plants e.g.,pressurized water reactors(PWRs)and boiling water reactors(BWRs).The applicability ofSection XI is limited to dealing with degradation detected by periodic inservice inspection,and to repair,replacement,and
