1、ANSI Z21.94-2006 (reaffirmed 2016) CSA 6.31-2006 (reaffirmed 2011)American National Standard / CSA Standard for Automatic Flammable Vapor Sensor Systems and ComponentsStandard DeveloperAPPROVEDCSA AMERICA INC. 8501 East Pleasant Valley RoadCleveland, Ohio 44131CANADIAN STANDARDS ASSOCIATION5060 Spec
2、trum Way, Suite 100Mississauga, Ontario, Canada L4W 5N6Published - February 2006Copyright 2006Canadian 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 de
3、siring permission for other republication should consult Canadian Standards Association, 5060 Specrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.Copyright 2006CSA America, Inc.Permission is granted to republish material herein in laws or ordinances, and in regulations, administrative order
4、s, or similar documents issued by public authorities. Those desiring permission for other republication should consult CSA America, Inc., 8501 East Pleasant Valley Road, Cleveland, Ohio 44131.AMERICAN NATIONAL STANDARDANSI Z21.94-2006CSA STANDARDCSA 6.31-2006First Edition - 2006This Standard is base
5、d on the Standard forConnectors For Gas AppliancesANSI Designation CSA Designationand Addenda Designation CSA Designation,Designation CSA DesignationSeptember 14, 2005American National Standards Institute, Inc.January 13, 2006Interprovincial Advisory Council Effective in Canada April 1, 2006IGACThe
6、Canadian Standards 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 sta
7、ndards development 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
8、by municipal, provincial, 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
9、 and skills to 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 s
10、ource of income 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 in
11、spects products 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 it
12、s corporate mission: 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.LAssociatio
13、n canadienne de 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
14、de rglementation, 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
15、et dagences gouvernementales. 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 constructi
16、on et de lenvironnement.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 p
17、artie des comits 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
18、des services de 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.Out
19、re son sige social 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 dentrep
20、rise, savoir la 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 cl
21、ients, tant lchelle 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 can
22、adienne de normalisation5060, 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 Ameri
23、can National Standards 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
24、interests, establish 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 agenci
25、es of U.S. Federal, 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 fo
26、r Standardization (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
27、the U.S. participation 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
28、 intended to assist 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 c
29、onstruction, and acceptable performance of flammable vapor sensor systems and components. It is the result of years of experience in the manufacture, testing, installation, maintenance, inspection and research on flammable vapor sensor systems and components. There are risks of injury to persons inh
30、erent 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 indicating a measure
31、of quality beyond compliance with the provisions it contains. It is designed to allow compliance of flammable vapor sensor systems and components, the safety construction and performance of which may exceed the various provisions specified herein. In its preparation, full recognition has been given
32、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 Accredited Standards Committee Z21/83, 8501 East Pleasant Valley Road, Clevela
33、nd, Ohio 44131, or the Chairman of the CSA Technical Committee on Gas Appliances and Related Accessories, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada, L4W 5N6.Safe and satisfactory operation of flammable vapor sensor systems and components depends to a great extent upon its proper ins
34、tallation, use and maintenance. It should be installed, as applicable, in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1.Users of this American National Standard/Canadian Standards Association Standard are advised that th
35、e devices, products and 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, Territori
36、al, Provincial, state or 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
37、 IS SUITABLE FOR AND APPLICABLE 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 la
38、ter than five (5) years 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:
39、 An organization using 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 Standards For Automatic Flammable Vapor Sensor Sys
40、tems And Components(This History is informative and is not part of the standard.)In 1995, several industry leaders formed the Water Heater Industry Joint Research and Development Consortium. The Consortiums mission was to determine whether a residential gas-fired water heater could be designed to re
41、dice or prevenr the ignition of flammable vapors, such as gasoline, without compromising the integrity of the heater, creating hazards, or violating safety or energy efficiency standards.One of the methods studied for accomplishing this objective was the use of a Flammable Vapor Sensor. So that a re
42、asoned analysis of Sensors using differing technologies could be made, the Consortium conducted the necessary research and development effort to produce a Flammable Vapor Sensor Specification for its own use. That specification was then made available to CSA International and GAMA-An Associations of
43、 Appliances and Equipment Manufacturers.Thus the framework for this standards arose, in large part, due to the work conducted by and under the auspices of the Water Heater Industry Joint research and Development Consortium.In February 2003 GAMAs Standards Review Task Group of the Controls Division e
44、stablished the Flammable Vapor Sensors and Systems Working Group. The Working Group began the task of promulgating the requirements contained in the first draft of this Standard for Automatic Flammable Vapor Sensor Systems and Components, May 19, 2003. On May 12, 2004, the Working Group forwarded it
45、s final draft to the Standards Review Task Group of the Controls Division fo GAMA for consideration. Then on June 24, 2004, the Standards Review Task Group adopted the final draft with modifications and agreed to forward it to the Z21/CSA Joint Technical Advisory Group on Standards for Automatic Gas
46、 Contols for its consideration.At its August 24, 2004 meeting the Joint Technical Advisory Group on Standards for Automatic Gas Controls adopted the proposed harmonized standard for Flammable Vapor Sensor Systems and Components for distribution for review and comment. The first draft harmonized flam
47、mable vapor sensor system standard was distributed for review and comment during November 2004.Following reconsideration and modifiaction of the proposed harmonized draft standard, in light of comments received, the Joint TAG on standards for Automatic Gas Controls, at its May 27, 2005 teleconferenc
48、e meeting, recommended the proposed harmonized standard to the Z21/83 Committee and the CSA Technical Committee for Approval.The proposed harmonized standard was apporved by the Z21/83 Committee by letter ballot dated July 7, 2005. The CSA Technical Committee approved the proposed harmonized standar
49、d by letter ballot dated June 10, 2005.The first edition of the American National Standard/CSA Standard for Flammable Vapor Sensor Systems and Components was approved by the Interprovincial Gas Advisory Council (IGAC) on January 13, 2006 and by the American National Standards Institute, Inc. (ANSI) on September 14, 2005.The following identifies the designation and year of the harmonized standard:ANSI Z21.94-2006 CSA 6.31-2006iiiInterprovincial Gas Advisory CouncilG.L. Willia
