BPVC_2015_Section_IV.pdf

Rules for Constructionof Heating BoilersSECTION IVASME BPVC.IV-20152015ASME Boiler andPressure Vessel CodeAn International CodeCopyrighted material licensed to University of Toronto by Thomson Scientific,Inc.().This copy downloaded on 2015-07-13 07:21:56-0500 by authorized user logan ahlstrom.No further reproduction or distribution is permitted.IVRULES FOR CONSTRUCTIONOF HEATING BOILERSASME Boiler and Pressure Vessel Committeeon Heating BoilersAN INTERNATIONAL CODE2015 ASME Boiler&Pressure Vessel Code2015 EditionJuly 1,2015Two Park Avenue New York,NY 10016 USACopyrighted material licensed to University of Toronto by Thomson Scientific,Inc.().This copy downloaded on 2015-07-13 07:21:56-0500 by authorized user logan ahlstrom.No further reproduction or distribution is permitted.Date of Issuance:July 1,2015This 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,”“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 markCertification MarkThe above ASME symbol is registered in the U.S.Patent Office.“ASME”is the trademark 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 2015.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2015 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedCopyrighted material licensed to University of Toronto by Thomson Scientific,Inc.().This copy downloaded on 2015-07-13 07:21:56-0500 by authorized user logan ahlstrom.No further reproduction or distribution is permitted.TABLE OF CONTENTSList of Sections.xiForeword.xiiiStatement of Policy on the Use of the Certification Mark and Code Authorization in Advertising.xvStatement of Policy on the Use of ASME Marking to Identify Manufactured Items.xvSubmittal of Technical Inquiries to the Boiler and Pressure Vessel Standards Committees.xviPersonnel.xviiiPreamble.xxxvSummary of Changes.xxxviList of Changes in Record Number Order.xlCross-Referencing and Stylistic Changes in the Boiler and Pressure Vessel Code.xliiPart HGGeneral Requirements for All Materials of Construction.1Article 1Scope and Service Restrictions.1HG-100Scope.1HG-101Service Restrictions.1HG-102Units.1HG-103Tolerances.2Article 2Material Requirements.3HG-200General Material Requirements.3HG-201Specific Material Requirements.3Article 3Design.4HG-300Design Pressure.4HG-301Cylindrical Parts Under Internal Pressure.4HG-305Formed Heads,Pressure on Concave Side.4HG-306Formed Heads,Pressure on Convex Side.5HG-307Flat Heads.5HG-309Spherically Dished Covers(Bolted Heads).9HG-312Cylindrical Parts Under External Pressure.11HG-320Openings in Boilers,General Requirements,.14HG-321Reinforcement Required for Openings in Shells and Formed Heads.15HG-323FlangedIn Openings in Formed Heads.16HG-325Reinforcement Required for Openings in Flat Heads.17HG-326Limits of Metal Available for Reinforcement.17HG-327Strength of Reinforcement.18HG-328Reinforcement for Multiple Openings.18HG-330Inspection and Access Openings.21HG-340Stayed Surfaces.21HG-341Staybolts.23HG-342Dimensions of Stays.23HG-343Dimensions of Diagonal Stays.25HG-345Staying of Heads.25HG-346Tubesheets with Firetubes Used as Stays.26HG-350Ligaments.26HG-360Requir