ASME_B40.100-2013.pdf

Pressure Gauges and Gauge AttachmentsAN AM E R IC A N NAT IO NAL STANDARDASME B40.100-2013Revision of ASME B40.100-2005(R2011)ASME B40.100-2013Revision of ASME B40.100-2005(R2011)Pressure Gaugesand GaugeAttachmentsAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USADate of Issuance:November 20,2013This Standard will be revised when the Society approves the issuance of a new edition.There willbe no written interpretations of the requirements of this Standard issued to this edition.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorrectly published items,or to correct typographical or grammatical errorsin codes and standards.Such errata shall be used on the date posted.The Committee Pages can be found at http:/cstools.asme.org/.There is an option available toautomatically receive an e-mail notification when errata are posted to a particular code or standard.ThisoptioncanbefoundontheappropriateCommitteePageafterselecting“Errata”inthe“PublicationInformation”section.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 EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B40 Committee.viPreface.viiASME B40.1Gauges:Pressure Indicating Dial Type Elastic Element.1ASME B40.2Diaphragm Seals.45ASME B40.5Snubbers.77ASME B40.6Pressure Limiter Valves.97ASME B40.7Gauges:Pressure Digital Indicating.107iiiFOREWORDASME Standards Committee B40 is comprised of a group of volunteers representing pressuregauge users,manufacturers,governmental agencies,testing laboratories,and other standards-producing bodies.All are convinced that national standards such as this serve not only to provideproduct performance and configuration guidelines but also to inform and assist both those whospecify and the users regarding the science of pressure gauge production,application,and use.The standards are vehicles by which the Committee as a body can transmit to users the benefitsof their combined knowledge and experience as regards the proper and safe use of pressuregauges.The use of this Standard is entirely voluntary and shall in no way preclude the manufactureroruseofproductsthatdonotconform.NeitherASMEnortheB40Committeeassumesresponsibil-ity for the effects of observance or nonobservance of recommendations made herein.The 2005 edition,which was approved on September 19,2005,was issued to includeNonmandatory Appendix C on Supplemental Requirements to B40.1,B40.2,B40.5,and B40.6.This revision was issued to clarify wording in the B40.1 body document as well as inNonmandatory Appendix C,now designated as Mandatory Appendix III.NonmandatoryAppendix A was also rewritten to include new gauge performance criteria,and it was designatedasMandatoryAppendixI.NonmandatoryAppendixBwasdesignatedasMandatoryAppendixII.This edition of the Standard was approved by the B40 Standards Committee on June 18,2013and approved as an American National Standard by the American National Standards Instituteon October 14,2013.ivASME B40 COMMITTEESpecifications for Pressure and Vacuum Gauges(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTE