1、ANSI Z21.22-2015 CSA 4.4-2015Relief valves for hot water supply systemsLegalNotice for StandardsCanadian Standards Association and CSA America, Inc. (operating as “CSA Group”) develop standards through a consensus standardsdevelopment process approved by the Standards Council of Canada and the Ameri
2、can National Standards Institute. This process brings togethervolunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA Group administers theprocess and establishes rules to promote fairness in achieving consensus,it does not independently test
3、, evaluate, or verify the content ofstandards.Disclaimerand exclusion of liabilityThis document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation,implied warranties or conditions concerning this documents fitness for a p
4、articularpurpose or use, its merchantability, or its non-infringementof any third partys intellectual property rights. CSA Group does not warrant the accuracy, completeness, or currency of any of the informationpublished in this document. CSA Group makes no representations or warranties regarding th
5、is documents compliancewith any applicablestatute, rule, or regulation.IN NO EVENT SHALL CSA GROUP, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OROFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES,H
6、OWSOEVER CAUSED,INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE,BUSINESS INTERRUPTION, LOST OR DAMAGED DATA,OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS,WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OFLIABILITY, ARISING OUT OF OR RESULTING FROM A
7、CCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA GROUP HAS BEENADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.In publishing and making this document available, CSA Group is not undertaking to render professional or other servicesfor or on behalf of anyperson
8、or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directedto those who have the appropriate degree of experience to use and apply its contents, and CSA Group accepts no responsibility whatsoeverarising in any way from any a
9、nd all use of or reliance on the information contained in this document.CSA Group is a private not-for-profit company that publishes voluntary standards and related documents. CSA Group has no power, nor does itundertake, to enforce compliancewith the contents of the standards or other documents it
10、publishes.Intellectualpropertyrights and ownershipAs between CSA Group and the users of this document (whether it be in printed or electronic form), CSA Group is the owner, or the authorizedlicensee,of all works contained herein that are protected by copyright, all trade-marks (except as otherwiseno
11、ted to the contrary), and allinventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patentsand applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may
12、 violate lawsthat protect CSA Groups and/or others intellectual property and may give rise to a right in CSA Group and/or others to seek legal redress forsuch use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA Group reserves all intellectual property rights
13、inthis document.Patent rightsAttention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be heldresponsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of
14、the validity of any suchpatent rights is entirely their own responsibility.Authorizeduse of this documentThis document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to doonly the following:If this document is in electronic form:
15、 load this document onto a computer for the sole purpose of reviewing it; search and browse this document; and print this document if it is in PDF format.Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA Group to have such copies,and
16、only if this Legal Notice appears on each such copy.In addition, users may not and may not permit others to alter this document in any way or remove this Legal Notice from the attached standard; sell this document without authorization from CSA Group; or make an electronic copy of this document.If y
17、ou do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make anycopies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutesyour acceptanceof the ter
18、ms and conditions of this Legal Notice.Revision HistoryANSI Z21.22-2015 CSA 4.4-2015Revisions from the first edition Revision symbol (in margin)Clauses 3, 4.5.2, 4.10.4, and 5.2Standards Update ServiceANSI Z21.22-2015 CSA 4.4-2015July 2015Title: Relief valves for hot water supply systemsTo register
19、for e-mail notification about any updates to this publication go to shop.csa.ca click on CSA Update ServiceThe List ID that you will need to register for updates to this publication is 2423731.If you require assistance, please e-mail techsupportcsagroup.org or call 416-747-2233.Visit CSA Groups poli
20、cy on privacy at www.csagroup.org/legal to find out how we protect your personal information.CSA GroupAmerican National Standards InstituteThe Canadian Standards Association (operating as “CSA Group”), under whose auspices this National Standard has been produced, was chartered in 1919 and accredite
21、d 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 development and certification activities. CSA Group standards reflect a national consensus of producers and users including manu
22、facturers, consumers, retailers, unions and professional organizations, and governmental agencies. The standards are used widely by industry and commerce and often adopted by municipal, provincial, and federal governments in their regulations, particularly in the fields of health, safety, building a
23、nd construction, and the environment.Individuals, companies, and associations across Canada indicate their support for CSA Groups standards development by volunteering their time and skills to Committee work and supporting CSA Groups objectives through sustaining memberships. The more than 7000 comm
24、ittee volunteers and the 2000 sustaining memberships together form CSA Groups total membership from which its Directors are chosen. Sustaining memberships represent a major source of income for CSA Groups standards development activities.CSA Group offers certification and testing services in support
25、 of and as an extension to its standards development activities. To ensure the integrity of its certification process, CSA Group regularly and continually audits and inspects products that bear the CSA Group Mark.In addition to its head office and laboratory complex in Toronto, CSA Group has regiona
26、l branch offices in major centres across Canada and inspection and testing agencies in eight countries. Since 1919, CSA Group has developed the necessary expertise to meet its corporate mission: CSA Group is an independent service organization whose mission is to provide an open and effective forum
27、for activities facilitating the exchange of goods and services through the use of standards, certification and related services to meet national and international needs.The American National Standards Institute (ANSI), Inc. is the nationally recognized coordinator of voluntary standards development
28、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, establish and improve the some 10,000 national consensus standards currently approved as American National Stan
29、dards. 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. Federal, state and local governments in achieving compatibility between government codes and standards and the
30、 voluntary standards of industry and commerce.ANSI represents the interests of the United States in international nontreaty organizations such as the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). The Institute maintains close ties with
31、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. participation in these groups.ANSI approval of standards is intended to verify that the principles of openness a
32、nd 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 assist the voluntary system to ensure that national standards needs are identified and met with a set of sta
33、ndards that are without conflict or unnecessary duplication in their requirements.For further information on CSA Group services, write to CSA Group 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6Responsibility of approving American standards rests with the American National Standa
34、rds Institute, Inc. 25 West 43rd Street, Fourth floor New York, NY 10036ISBN 978-1-77139-949-4 2015 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.Published in July 2015 by CSA Group A not-for-profit p
35、rivate sector organization 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3 To purchase standards and related publications, visit our Online Store at shop.csa.caor call toll-free 1-800-463-6727 or 416-747-4044.TMA trade-mark of the Canadian Standards Association and CSA America Inc., operatin
36、g as “CSA Group”American National Standards Institute, Inc.Interprovincial Gas Advisory CouncilApproved on June 19, 2015 by ANSIApproved on June 26, 2015 by IGACEffective in Canada March 31, 2017Relief valves for hot water supply systemsANSI Z21.22-2015 CSA 4.4-2015ANSI Z21.22-2015 CSA 4.4-2015Relie
37、f valves for hot water supply systemsJuly 2015 2015 CSA Group 1ContentsInterprovincial Gas Advisory Council (IGAC) 3Technical Committee on Performance and Installation of Gas Burning Appliances and Related Accessories 5CSA Technical Committee on Gas Appliances and Related Accessories 8Joint Z21/CSA
38、Technical Sub-Committee on Standards for Gas-Fired Water Heaters 11Preface 171 Scope 192 Reference publications 203 Definitions 204 Construction 224.1 General 224.2 Connections and flow areas 224.3 Bolts and screws 254.4 Adjustments 254.5 Strength 254.6 Corrosion 264.7 Thermal sensing element tubes
39、264.8 Assembly 264.9 Instructions 264.10 Marking 275 Performance - Pressure relief element 285.1 Installation for test 285.2 Opening, relieving, and reseating pressures 295.3 Continued operation 305.4 Leakage 315.5 Marking material legibility 316 Performance - Temperature relief element 316.1 Reliev
40、ing and reseating temperature 316.2 Discharge capacity 326.3 Continued operation 336.4 Leakage 346.5 Marking material legibility 347 Performance - Vacuum relief valves 347.1 Relieving vacuum 347.2 Air passing capacity 357.3 Leakage of water 35ANSI Z21.22-2015 CSA 4.4-2015Relief valves for hot water
41、supply systemsJuly 2015 2015 CSA Group 27.4 Resistance to deterioration by hot water 358 Manufacturing and production tests 359 Items unique to Canada 36Annex A (informative) Table of conversion factors 37ANSI Z21.22-2015 CSA 4.4-2015Relief valves for hot water supply systemsJuly 2015 2015 CSA Group
42、 3Interprovincial Gas Advisory Council (IGAC)J.R. Marshall Technical Standards b) relevant clause, table, and/or figure number;c) wording of the proposed change; andd) rationale for the change.6) To submit a request for interpretation of this Standard, please send the following information to inquir
43、iescsagroup.org and include “Request for interpretation” in the subject line: a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible
44、, phrase the request in such a way that a specific “yes” or “no” answer will address the issue. Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa
45、.ca.ANSI Z21.22-2015 CSA 4.4-2015Relief valves for hot water supply systemsJuly 2015 2015 CSA Group 18History of the development of ANSI Z21.22-2015 CSA 4.4-2015Note: This history is informative and is not part of the standard.With the onset of the Free Trade Agreement between the United States and
46、Canada on January 2, 1988, significant attention was given to the harmonization of the United States and Canadian safety standards addressing gas-fired equipment for residential, commercial and industrial applications. It was believed that the elimination of the differences between the standards wou
47、ld remove potential trade barriers and provide an atmosphere in which North American manufacturers could market more freely in the United States and Canada. The harmonization of these standards was also seen as a step toward harmonization with international standards. Joint subcommittees were establ
48、ished to facilitate the standards harmonization process between the United States and Canada.At its October 24, 1995 meeting, the Z21/CGA Joint Subcommittee on Standards for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems appointed an ad hoc working group to prepare a dr
49、aft bi-national standard for Relief Valves. By letter ballot dated May 16, 1997, the joint subcommittee approved sending the draft standard for public 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 Temperature, Pressure, Temperature and Pressure Relief Valves and Vacuum Relief Valves, CAN1-4.4-M80 (R1996).Following reconsideratio
copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1