1、ASCE STANDARD ANSI/ASCE/SEI25-16Earthquake-ActuatedAutomatic Gas ShutoffDevicesPUBLISHED BY THE AMERICAN SOCIETY OF CIVIL ENGINEERSLibrary of Congress Cataloging-in-Publication DataNames: American Society of Civil Engineers, issuing body.Title: Earthquake-actuated automatic gas shutoff devices / Ame
2、rican Society of CivilEngineers.Description: Reston : American Society of Civil Engineers, 2016. | Series: ASCE standard |“ANSI/ASCE/SEI 25-16.” | “This document uses both the International System of Units (SI)and customary units.” | Includes bibliographical references and index.Identiers: LCCN 2016
3、043551 (print) | LCCN 2016044225 (ebook) | ISBN 9780784413890(pbk.) | ISBN 9780784478936 (pdf)Subjects: LCSH: Gas appliancesStandardsUnited States. | EarthquakesSafety measures.Classication: LCC TP758 .E27 2016 (print) | LCC TP758 (ebook) | DDC 683/.88dc23LC record available at https:/lccn.loc.gov/2
4、016043551Published by American Society of Civil Engineers1801 Alexander Bell DriveReston, Virginia, 20191-4382www.asce.org/bookstore | ascelibrary.orgThis standard was developed by a consensus standards development process that has beenaccredited by the American National Standards Institute (ANSI).
5、Accreditation by ANSI, avoluntary accreditation body representing public and private sector standards developmentorganizations in the United States and abroad, signies that the standards developmentprocess used by ASCE has met the ANSI requirements for openness, balance, consensus, anddue process.Wh
6、ile ASCEs process is designed to promote standards that reect a fair and reasonedconsensus among all interested participants, while preserving the public health, safety, andwelfare that is paramount to its mission, it has not made an independent assessment of anddoes not warrant the accuracy, comple
7、teness, suitability, or utility of any information,apparatus, product, or process discussed herein. ASCE does not intend, nor shouldanyone interpret, ASCEs standards to replace the sound judgment of a competentprofessional, having knowledge and experience in the appropriate eld(s) of practice, norto
8、 substitute for the standard of care required of such professionals in interpreting andapplying the contents of this standard.ASCE has no authority to enforce compliance with its standards and does not undertake tocertify products for compliance or to render any professional services to any person o
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10、ard. Any individual who relies on this standard assumes full responsibility forsuch use.ASCE and American Society of Civil EngineersRegistered in U.S. Patent and TrademarkOfce.Photocopies and permissions. Permission to photocopy or reproduce material from ASCEpublications can be requested by sending
11、 an e-mail to permissionsasce.org or by locatinga title in ASCEs Civil Engineering Database (http:/cedb.asce.org) or ASCE Library(http:/ascelibrary.org) and using the “Permissions” link.Errata: Errata, if any, can be found at http:/dx.doi.org/10.1061/9780784413890.Copyright 2016 by the American Soci
12、ety of Civil Engineers.All Rights Reserved.ISBN 978-0-7844-1389-0 (print)ISBN 978-0-7844-7893-6 (PDF)Manufactured in the United States of America.212019181716 12345ASCE STANDARDSIn 2014, the Board of Direction approved revisions to the ASCERules for Standards Committees to govern the writing andmain
13、tenance of standards developed by ASCE. All such stan-dards are developed by a consensus standards process managedby the ASCE Codes and Standards Committee (CSC). Theconsensus process includes balloting by a balanced standardscommittee and reviewing during a public comment period. Allstandards are u
14、pdated or reafrmed by the same process every5 to 10 years. Requests for formal interpretations shall beprocessed in accordance with Section 7 of ASCE Rules forStandards Committees, which is available at www.asce.org.Errata, addenda, supplements, and interpretations, if any, forthis standard can also
15、 be found at www.asce.org.The provisions of this document are written in mandatorylanguage and, as such, are intended to be suitable for regulatoryor contractual purposes.This standard has been prepared in accordance with recog-nized engineering principles and should not be used without theusers com
16、petent knowledge for a given application. The publi-cation of this standard by ASCE is not intended to warrant thatthe information contained therein is suitable for any general orspecic use, and ASCE takes no position respecting the validityofpatent rights.Usersareadvisedthatthedeterminationofpatent
17、rights or risk of infringement is entirely their own responsibility.A complete list of currently available standards is available inthe ASCE Library (http:/ascelibrary.org/page/books/s-standards).iiiDEDICATIONMartin Rene Asbra19452012The members of the Earthquake-Actuated Automatic Gas Shutoff Syste
18、ms StandardsCommittee of the Structural Engineering Institute respectfully dedicate this edition ofthe standard in the memory of Martin R. “Marty” Asbra, who passed away in Tracy,California, in the spring of 2012. Marty was an ardent believer in the value of seismicvalves and a founding member of th
19、is Committee.vCONTENTSPREFACE . ixACKNOWLEDGMENTS . xi1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2
20、 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2.1 Pressure Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2.2 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、 . . . . . . . . . . . . . . . . . . . 11.3 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.3.1 Mode of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.3.2 Operating Conditions . .
22、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.3.3 Pressure Specication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.4 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、 . . . 11.4.1 Permanent Label. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.4.2 Installation Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.4.3 Resetting Warning . . . . . . . . . . . . . . . . . . . . . . .
24、. . . . . . . . . . . . . . . . . . . . 11.5 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 CONSTRUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.1 General. . . .
25、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.1.1 Indication of Actuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.1.2 Resetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、. . . . . . . . . . . . 32.2 Equipment and Data to Be Furnished by the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . 32.3 Corrosion and Chemical Resistance of External Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.4 Instructions. . . . . . . . . . . . . . . .
27、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.5 Continued Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28、 . . . . 53.1 Rigidity of Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.2 Deection Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.3 Test Specimens . . . . . . . . . . . . . . . . . .
29、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.4 Ruggedness of Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.4.1 Ruggedness Test Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.4.2 Metho
30、d of Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.5 Performance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.5.1 Actuation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31、. . . . . . . . . . . . 53.5.2 Nonactuation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.5.3 Method of Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.6 Marking Material Durability and Adhesion. . . . . .
32、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.6.1 Marking Material Durability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.6.2 Adhesion Evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 DEFINITIONS . . . .
33、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9COMMENTARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34、 . . . . . . . . . . . . . . . . . . . . . . . 11C1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13C1.1 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Eart
35、hquake-Actuated Automatic Gas Shutoff Devices viiC1.2 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13C1.2.2 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14C1.3.1 Mode of
36、Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14C1.4.2 Installation Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14C1.4.3 Resetting Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37、 . . . . . . . . . . 14C1.5 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14C2 CONSTRUCTIONC2.1.1 Indication of Actuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15C2.2 Equipment and Data to
38、Be Furnished by the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . 15C3 PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17C3.2 Deection Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39、. . . . . . . . . . . . . 17C3.4 Ruggedness of Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17C3.5 Performance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17C5 REFERENCES . . . . . . . . . . .
40、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19INDEX . 21viii ANSI/ASCE/SEI STANDARD 25-16PREFACEInitiation of a standard for earthquake valves began in 1977 witha request from the American National Standards Committee Z21to the Automatic Valve Working Commi
41、ttee of the Z21 Sub-committee on Standards for Gas Appliance Control Devices,which appointed anEarthquake ValveWorking Group in1978 toprepare a draft standard.The ensuing draft standard was distributed for review andcomment in mid-1979. A revised draft standard was adopted bythe American National St
42、andards Committee Z21 by letter ballotin December 1979. The rst edition of a standard for earthquakevalvesANSI/AGA Z21.70, Earthquake-Actuated AutomaticGas Shutoff Systemswas approved as an American NationalStandard by the American National Standards Institute on April16, 1981.In 1981, the secretari
43、at for the standard was transferred fromthe American Gas Association to the American Society ofMechanical Engineers (ASME). The ASME committee that wasassigned responsibility for the standard did not initiate anychanges. In 1991, a proposal was approved for the formationof a Pre-Standard Committee w
44、ithin the Gas and Liquid FuelLifelines Committee of the Technical Council on Lifeline Earth-quake Engineering (TCLEE) of the American Society of CivilEngineers (ASCE) to revise ANSI Z21.70.A full standard committee was formed in late 1992 and met forthe rst time in early 1993. The Committee was form
45、ed ofmanufacturing, engineering, local and state government, andinsurance representatives.The extensive data collected following the January 17, 1994,Northridge, California, Earthquake (hereafter referred to as theNorthridge Earthquake) provided a unique opportunity to assessthe risk posed to the pu
46、blic by natural gasrelated postearthquakeres and ground motions for which automatic gas shutoff wouldbe benecial. The Committee met in the months following theNorthridge Earthquake and nalized the scope of research need-ed to support development for a revised standard.The Committee focused its resea
47、rch on two key areas: (1)dynamic testing of current devices, which was needed to quantifyperformance characteristics; and (2) in-depth examination ofNorthridge Earthquake data on ground motions, structural dam-age, re initiation, and actuation of existing earthquake-actuatedautomatic gas shutoff dev
48、ices.A proposal to perform research in these two areas wasprepared for ASCE by the Committee, and the project wasjointly funded by FEMA, natural gas utilities, and shutoff-devicemanufacturers. The research project was initiated in March 1995and completed in November 1995.Performance characteristics
49、of the devices tested weredetermined and evaluated for both discrete dynamic loads andcomplexmotions(e.g.,simulated ground motions). Theresults ofthe dynamic testing of devices that were then on the marketbracketed the ranges that were used in dening the actuationrequirements in response to seismic disturbances.The second edition of the standard, ASCE 25-97, was pub-lished in 1999. The third edition of the standard, ASCE 25-06,was published in 2008. The present editionASCE 25-16,Earthquake-Actuated Automatic Gas Shutoff Devicesis thefourth edition of
