-100_Edtn_2005.pdf

AN AMERICAN NATIO NAL STANDARDPressure Gauges and Gauge AttachmentsASME B40.100-2005(Revision of ASME B40.100-1998)Copyrighted 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 B40.100-2005(Revision of ASME B40.100-1998)Pressure Gaugesand GaugeAttachmentsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyrighted 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:May 15,2006The next edition of this Standard is scheduled for publication in 2010.There will be no addenda orwritten interpretations of the requirements of this Standard issued to this edition.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 assumes 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 2006 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyrighted 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.ivCommittee Roster.vCorrespondence With the B40 Committee.viPreface.viiASME B40.1Gauges:Pressure Indicating Dial Type Elastic Element.1ASME B40.2Diaphragm Seals.43ASME B40.5Snubbers.69ASME B40.6Pressure Limiter Valves.87ASME B40.7Gauges:Pressure Digital Indicating.95iiiCopyrighted 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.FOREWORDASME Standards Committee B40 is comprised of a balanced cross section of pressure gaugeusers,manufacturers,andinterestedmembersrepresentinggovernmentalagencies,testinglabora-tories,and other standards-producing bodies.All are convinced that national standards such asthis one serve not only to provide product performance and configuration guidelines,but alsoto inform and update the specifier and user regarding the science of pressure gauge production,application,and use.The standards are vehicles by which the Committee as a body can transmitto users the benefits of their combined knowledge and experience as regards the proper and safeuse of pressure gauges.This Standard is advisory only.Its use is entirely a voluntary matter and shall in no waypreclude the manufacture or use of products that do not conform.Neither ASME nor the B40Committee assumes responsibility for the effects of observance or nonobservance of recommenda-tions made herein.An addenda was issued on December 31,2001,adding Nonmandatory Appendix C to B40.1,B40.2,B40.5,and B40.6.This Standard was approved by the B40 Standards Committee and approved as an AmericanNational Standard by the American National Standards Institute on September 19,2005.ivCopyrighted 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 B40 COMMITTEESpecifications for Pressure and Vacuum Gauges(The follow