HO-1_Edtn_2007.pdf

Safety Standard for Pressure Vessels for Human OccupancyAN AMERICAN NATIO NAL STANDARDASME PVHO-12007(Revision of ASME PVHO-12002)Copyright 2007 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME PVHO-12007(Revision of ASME PVHO-12002)Safety Standardfor PressureVessels forHumanOccupancyAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyright 2007 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:November 16,2007The next edition of this Standard is scheduled for publication in 2010.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Once approved,interpretations are published on the ASME Web site under the CommitteePages at http:/cstools.asme.org and are subsequently published in the next edition of this Standard.Users of this Standard are advised to check the ASME PVHO Committee Web page periodically forinterpretations,errata,and cases.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput 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 anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely 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 establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.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 Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2007 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright 2007 by the American Society of Mechanical Engineers.No reproduction may be made of this material without written consent of ASME.cCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.viiCommittee Roster.viiiCorrespondence With the PVHO Committee.xIn Memoriam.xiiSummary of Changes.xiiiSection 1General Requirements.11-1Introduction.11-2Scope.11-3Exclusions.11-4User Requirements.11-5Manufacturers Data Report.11-6Materials.21-7Design and Fabrication Requirements.21-8Pressure Relief Devices.81-9Marking.81-10Nonmetallic Materials and Toxicity Offgas Testing.91-11Risk Analysis.10Section 2Viewports.162-1General.162-2Design.162-3Material.262-4Fabrication.292-5Inspection.292-6Marking.312-7Pressure Testing.322-8Installation of Windows in Chambers.322-9Repair of Damaged Windows Prior to Being Placed in Service.332-10Guidelines for Application of the Requirements of Section 2.34Section 3Quality Assurance for PVHO Manufacturers.843-1General.843-2Responsibilities.84Section 4Piping Systems.854-1General.854-2Material Requirements.864-3Design of Components.874-4Selection and Limitations of Piping Components.884-5Selection and Limitation of Piping Joints.894-6Supports.904-7Inspection.904-8Testing.904-9Systems.91Section 5Medical Hyperbaric Systems.995-1General.995-2PVHO System Design.995-3Gas Systems.995-4Control Systems and Instrumentation.1005-5Environmental Systems.100iii