ANSI CSA AM Z21.87-2007 CSA 4.6-2007 Automatic Gas Shutoff Devices For Hot Water Supply Systems (Second Edition).pdf

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1、ANSI Z21.87-2007CSA 4.6-2007American National Standard/ CSA Standard ForAutomatic Gas Shutoff Devices For Hot Water Supply SystemsStandard DeveloperAPPROVEDCSA AMERICA INC. 8501 East Pleasant Valley RoadCleveland, Ohio 44131CANADIAN STANDARDS ASSOCIATION5060 Spectrum Way, Suite 100Mississauga, Ontar

2、io, Canada L4W 5N6Published - October 2007Copyright 2007Canadian Standards AssociationPermission is granted to republish material herein in laws or ordinances, and in regulations, administrative orders, or similar documents issued by public authorities. Those desiring permission for other republicat

3、ion should consult Canadian Standards Association, 5060 Specrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.Copyright 2007CSA America, Inc.Permission is granted to republish material herein in laws or ordinances, and in regulations, administrative orders, or similar documents issued by publ

4、ic authorities. Those desiring permission for other republication should consult CSA America, Inc., 8501 East Pleasant Valley Road, Cleveland, Ohio 44131.AMERICAN NATIONAL STANDARDANSI Z21.87-2007CSA STANDARDCSA 4.6-2007Second Edition - 2007This Standard is based on the Standard forAutomatic Gas Shu

5、toff DevicesFor Hot Water Supply SystemsANSI Z21.87-1999 CSA 4.6-M99and ANSI Z21.87a-2004 CSA 4.6a-2004,ANSI Z21.87b-2005 CSA 4.6b-2005July 19, 2007American National Standards Institute, Inc.September 14, 2007Interprovincial Gas Advisory Council Effective in Canada May 1, 2009IGACThe Canadian Standa

6、rds Association (CSA), under whose auspices this National Standard has been produced, was chartered in 1919 and accredited by the Standards Council of Canada to the National Standards system in 1973. It is a not-for-profit, nonstatutory, voluntary membership association engaged in standards developm

7、ent and certification activities.CSA standards reflect a national consensus of producers and users including manufacturers, consumers, retailers, unions and professional organizations, and governmental agencies. The standards are used widely by industry and commerce and often adopted by municipal, p

8、rovincial, and federal governments in their regulations, particularly in the fields of health, safety, building and construction, and the environment.Individuals, companies, and associations across Canada indicate their support for CSAs standards development by volunteering their time and skills to

9、CSA Committee work and supporting the Associations objectives through sustaining memberships. The more than 7000 committee volunteers and the 2000 sustaining memberships together form CSAs total membership from which its Directors are chosen. Sustaining memberships represent a major source of income

10、 for CSAs standards development activities.The Association offers certification and testing services in support of and as an extension to its standards development activities. To ensure the integrity of its certification process, the Association regularly and continually audits and inspects products

11、 that bear the CSA Mark.In addition to its head office and laboratory complex in Toronto, CSA has regional branch offices in major centres across Canada and inspection and testing agencies in eight countries. Since 1919, the Association has developed the necessary expertise to meet its corporate mis

12、sion: CSA is an independent service organization whose mission is to provide an open and effective forum for activities facilitating the exchange of goods and services through the use of standards, certification and related services to meet national and international needs.LAssociation canadienne de

13、 normalisation (CSA), sous les auspices de laquelle cette Norme nationale a t prpare, a reu ses lettres patentes en 1919 et son accrditation au sein du Systme de Normes nationales par le Conseil canadien des normes en 1973. Association daffiliation libre, sans but lucratif ni pouvoir de rglementatio

14、n, elle se consacre llaboration de normes et la certification.Les normes CSA refltent le consensus de producteurs et dusagers de partout au pays, au nombre desquels se trouvent des fabricants, des consommateurs, des dtaillants et des reprsentants de syndicats, de corps professionnels et dagences gou

15、vernementales. Lutilisation des normes CSA est trs rpandue dans lindustrie et le commerce, et leur adoption divers ordres de lgislation, tant municipal et provincial que fdral, est chose courante, particulirement dans les domaines de la sant, de la scurit, du btiment, de la construction et de lenvir

16、onnement.Les Canadiens dun bout lautre du pays tmoignent de leur appui au travail de normalisation men par la CSA en participant bnvolement aux travaux des comits de la CSA et en appuyant ses objectifs par leurs cotisations de membres de soutien. Les quelque 7000 volontaires faisant partie des comit

17、s et les 2000 membres de soutien constituent lensemble des membres de la CSA parmi lesquels ses administrateurs sont choisis. Les cotisations des membres de soutien reprsentent une source importante de revenu pour les services de soutien la normalisation volontaire.LAssociation offre des services de

18、 certification et de mise lessai qui appuient et compltent ses activits dans le domaine de llaboration de normes. De manire assurer lintgrit de son processus de certification, lAssociation procde de faon rgulire et continue lexamen et linspection des produits portant la marque CSA.Outre son sige soc

19、ial et ses laboratoires Toronto, la CSA possde des bureaux rgionaux dans des centres vitaux partout au Canada, de mme que des agences dinspection et dessai dans huit pays. Depuis 1919, lAssociation a parfait les connaissances techniques qui lui permettent de remplir sa mission dentreprise, savoir la

20、 CSA est un organisme de services indpendant dont la mission est doffrir une tribune libre et efficace pour la ralisation dactivits facilitant lchange de biens et de services par lintermdiaire de services de normalisation, de certification et autres, pour rpondre aux besoins de nos clients, tant lch

21、elle nationale quinternationale.Canadian Standards AssociationFor further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100, Mississauga, Ontario,Canada L4W 5N6Pour plus de renseignements sur les services dela CSA, sadresser Association canadienne de nor

22、malisation5060, Spectrum Way, bureau 100Mississauga, Ontario, Canada L4W 5N6American National Standards InsitituteResponsibility of approving American National Standards rests with theAmerican National Standards Institute, Inc.25 West 43rd Street, Fourth FloorNew York, NY10036The American National S

23、tandards Institute (ANSI), Inc. is the nationally recognized coordinator of voluntary standards development in the United States through which voluntary organizations, representing virtually every technical discipline and every facet of trade and commerce, organized labor and consumer interests, est

24、ablish and improve the some 10,000 national consensus standards currently approved as American National Standards.ANSI provides that the interests of the public may have appropriate participation and representation in standardization activity, and cooperates with departments and agencies of U.S. Fed

25、eral, state and local governments in achieving compatibility between government codes and standards and the voluntary standards of industry and commerce.ANSI represents the interests of the United States in international nontreaty organizations such as the International Organization for Standardizat

26、ion (ISO) and the International Electrotechnical Commission (IEC). The Institute maintains close ties with regional organizations such as the Pacific Area Standards Congress (PASC) and the Pan American Standards Commission (COPANT). As such, ANSI coordinates the activities involved in the U.S. parti

27、cipation in these groups.ANSI approval of standards is intended to verify that the principles of openness and due process have been followed in the approval procedure and that a consensus of those directly and materially affected by the standards has been achieved. ANSI coordination is intended to a

28、ssist the voluntary system to ensure that national standards needs are identified and met with a set of standards that are without conflict or unnecessary duplication in their requirements.PrefaceThis publication represents a basic standard for safe operation, substantial and durable construction, a

29、nd acceptable performance of automatic gas shutoff devices for hot water supply systems. It is the result of years of experience in the manufacture, testing, installation, maintenance, inspection and research on automatic gas shutoff devices for hot water supply systems. There are risks of injury to

30、 persons inherent in appliances that, if completely eliminated, would defeat the utility of the appliance. The provisions in this standard are intended to help reduce such risks while retaining the normal operation of the appliance.Nothing in this standard is to be considered in any way as indicatin

31、g a measure of quality beyond compliance with the provisions it contains. It is designed to allow compliance of automatic gas shutoff devices for hot water supply systems, the safety construction and performance of which may exceed the various provisions specified herein. In its preparation, recogni

32、tion has been given to possibilities of improvement through ingenuity of design. As progress takes place, revisions may become necessary. When they are believed desirable, recommendations or suggestions should be forwarded to the Chairman of the Z21/83 Committee, 8501 East Pleasant Valley Road, Clev

33、eland, Ohio 44131, or the Chairman of CSA Technical Committee on Gas Appliances and Related Accessories, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.Safe and satisfactory operation of automatic gas shutoff devices for hot water supply systems depends to a great extent upon its

34、 proper installation, use and maintenance. It should be installed, as applicable, in accordance with the National Fuel Gas Code, ANSI Z223.1; the Natural Gas and Propane Installation Code, CAN/CSA-B149.1.Users of this American National Standard/CSA Standard are advised that the devices, products and

35、 activities within its scope may be subject to regulation at the Federal, Territorial, Provincial, state or local level. Users are strongly urged to investigate this possibility through appropriate channels. In the event of a conflict with this standard, the Federal, Territorial, Provincial, state o

36、r local regulation should be followed.THIS STANDARD IS INTENDED TO BE USED BY THE MANUFACTURING SECTOR AND BY THOSE APPLYING THE EQUIPMENT AND BY THOSE RESPONSIBLE FOR ITS PROPER INSTALLATION. IT IS THE RESPONSIBILITY OF THESE USERS TO DETERMINE THAT IN EACH CASE THIS STANDARD IS SUITABLE FOR AND AP

37、PLICABLE TO THE SPECIFIC USE THEY INTEND.CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute, Inc., require that action be taken to reaffirm, revise or withdraw this standard no later than five (5) years

38、 from the date of approval. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute, Inc., 25 West 43rd Street, Fourth Floor, New York, N.Y. 10036, (212) 642-4900.EFFECTIVE DATE: An organization using

39、this standard for product evaluation as a part of its certification program will normally establish the date by which all products certified by that organization should comply with this standard.iiHistory Of The Development Of The Standard For Automatic Gas Shutoff Devices For Hot Water Supply Syste

40、ms(This History is informative and is not part of the standard.)With the onset of the Free Trade Agreement between the United States and Canada on January 2, 1988, significant attention was given to the harmonization of the United States and Canadian safety standards addressing gas-fired equipment f

41、or residential, commercial and industrial applications. It was believed that the elimination of the differences between the standards would remove potential trade barriers and provide an atmosphere in which North American manufacturers could market more freely in the United States and Canada. The ha

42、rmonization of these standards was also seen as a step toward harmonization with international standards. Joint subcommittees were established to facilitate the standards harmonization process between the United States and Canada.At its October 24, 1995 meeting, the Z21/CGA Joint Subcommittee on Sta

43、ndards for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems appointed an ad hoc working group to prepare a draft bi-national standard for Automatic Gas Shutoff Devices. By letter ballot dated May 16, 1997, the joint subcommittee approved sending the draft standard for pub

44、lic review and comment.The first draft harmonized standard was based on current coverage from the American National Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, Z21.22-1986, and the Canadian Gas Association Standard for Automatic Gas Shutoff Valves and D

45、evices for Hot Water Supply Systems, CAN1-4.6-78.Following reconsideration and modification of the proposed draft standard, in light of comments received, the joint relief valve subcommittee at its September 30, 1997 meeting, recommended the proposed draft standard to Accredited Standards Committee

46、Z21/83 and the (Interim CSA) Standards Steering Committee for approval.The proposed draft of the harmonized standard for automatic gas shutoff devices, as modified by the joint subcommittee, was approved by the Z21/83 Committee at its April 30, 1998 meeting, and by the CGA Standards Steering Committ

47、ee by letter ballot dated October 27, 1998.The first edition of the American National Standard/CSA Standard for Automatic Gas Shutoff Devices for Hot Water Supply Systems was approved by the Canadian Interprovincial Gas Advisory Council on January 21, 1999, and by the American National Standards Ins

48、titute, Inc., on October 16, 1998.The second edition of the American National Standard/CSA Standard for Automatic Gas Shutoff Devices for Hot Water Supply Systems was approved by the Canadian Interprovincial Gas Advisory Council on September 14, 2007, and by the American National Standards Institute

49、, Inc., on July 19, 2007.The following identifies the designation and year of the harmonized standard:iiiANSI Z21.87-1999 CSA 4.6-M99ANSI Z21.87a-2004 CSA 4.6a-2004ANSI Z21.87b-2005 CSA 4.6b-2005The following identifies the designation and year of the second edition of the standard:ANSI Z21.87-2007 CSA 4.6-2007Note: This the second edition of Z21.87i iCSA 4.6 incorporates changes to the 1999 edition and addenda thereto. Changes, other than editorial, are denoted by a vertic