BPVC_2021_Section_VIII_div._1.pdf

SECTION VIIIRules for Construction of Pressure VesselsASME BPVC.VIII.1-2021Division 12021ASME Boiler andPressure Vessel CodeAn International CodeMarkings such as“ASME,”“ASME Standard,”or any other marking including“ASME,”ASME logos,or the ASME Single Cerficaon Mark shall not be used on any item that is not constructed in accordance with all of the applicable requirements of the Code or Standard.Use of of the ASME Single Cerficaon Mark requires formal ASME cerficaon;if no cerficaon program is available,such ASME markings may not be used.(For Cerficaon and Accreditaon Programs,see hps:/www.asme.org/cerficaon-accreditaon.)Items produced by pares not formally possessing an ASME Cerficate may not be described,either explicitly or implicitly,as ASME cerfied or approved in any code forms or other document.VIIIRULES FOR CONSTRUCTIONOF PRESSURE VESSELSDivision 1ASME Boiler and Pressure Vessel Committeeon Pressure VesselsAN INTERNATIONAL CODE2021 ASME Boiler&Pressure Vessel Code2021 EditionJuly 1,2021Two Park Avenue New York,NY 10016 USADate of Issuance:July 1,2021This international code or standard was developed under procedures accredited as meeting the criteria forAmerican National Standards and it is an American National Standard.The Standards Committee that approvedthe code or standard was balanced to assure that individuals from competent and concerned interests havehad an opportunity to participate.The proposed code or standard was made available for public review and com-ment that provides an opportunity for additional public input from industry,academia,regulatory agencies,andthe public-at-large.ASME does not“approve,certify,“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 anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liabilityfor infringement of any applicable letters patent,nor assume any such liability.Users of a code or standard areexpressly advised that determination of the validity of any such patent rights,and the risk of infringement of suchrights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the es-tablished ASME procedures and policies,which precludes the issuance of interpretations by individuals.The endnotes and preamble in this document(if any)are part of this American National Standard.ASME Collective Membership MarkASME Single Certification MarkASME and the above ASME symbols are registered trademarks of The American Society of Mechanical Engineers.No part of this document may be reproduced in any form,in an electronicretrieval system or otherwise,without the prior written permission of thepublisher.Library of Congress Catalog Card Number:56-3934Printed in the United States of AmericaAdopted by the Council of The American Society of Mechanical Engineers,1914;latest edition 2021.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2021 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedTABLE OF CONTENTSList of Sections.xxxiiiForeword.xxxvStatement of Policy on the Use of the ASME Single Certification Mark and Code Authorization in AdvertisingxxxviiStatement of Policy on the Use of ASME Marking to Identify Manufactured Items.xxxviiSubmittal of Technical Inquiries to the Boiler and Pressure Vessel Standards Committees.xxxviiiPersonnel.xliSummary of Changes.lxiiList of Changes in Record Number Order.lxixCross-Referencing and Stylistic Changes in the Boiler and Pressure Vessel Code.lxxIntroduction.1U-1Scope.1U-2General.3U-3Standards Referenced by This Division.4U-4Units of Measurement.4U-5Tolerances.5Subsection AGeneral Requirements.8Part UGGeneral Requirements for All Methods of Construction and AllMaterials.8UG-1Scope.8Materials.8UG-4General.8UG-5Plate.9UG-6Forgings.9UG-7Castings.9UG-8Pipe and Tubes.9UG-9Welding Materials.10UG-10Material Identified With or Produced to a Specification Not Per-mitted by This Division,and Material Not Fully Identified.10UG-11Prefabricated or Preformed Pressure Parts Furnished Without aCertification Mark.11UG-12Bolts and Studs.13UG-13Nuts and Washers.14UG-14Rods and Bars.14UG-15Product Specification.14Design.15UG-16General.15UG-17Methods of Fabrication in Combination.15UG-18Materials in Combination.16UG-19Special Constructions.16UG-20Design Temperature.16UG-21Design Pressure.17UG-22Loadings.17UG-23Maximum Allowable Stress Values.17UG-24Castings.19UG-25Corrosion.20UG-26Linings.20UG-27Thickness of Shells Under Internal Pressure.20UG-28Thickness of Shells and Tubes Under External Pressure.21iiiUG-29Stiffening Rings for Cylindrical Shells Under External Pressure.25UG-30A