1、ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes for use in water heatersLegal Notice for StandardsCanadian Standards Association and CSA America, Inc. (operating as “CSA Group”) develop standards through a consensus standards development process approved by the Standards Council of Canada and t
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18、his document constitutes your acceptance of the terms and conditions of this Legal Notice.Revision HistoryANSI Z21.98-2015 CSA 4.10-2015, Non-metallic dip tubes for use in water heatersRevision from second edition Revision symbol (in margin)Clauses 4.1.2, 4.2.1, and 4.2.3Standards Update ServiceANSI
19、 Z21.98-2015 CSA 4.10-2015August 2015Title: Non-metallic dip tubes for use in water heatersTo register 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 2423860.If y
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21、 in any form whatsoever without the prior permission of the publisher.Published in August 2015 by CSA Group A not-for-profit private sector organization 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3 To purchase standards and related publications, visit our Online Store at shop.csa.caor cal
22、l toll-free 1-800-463-6727 or 416-747-4044.TMA trade-mark of the Canadian Standards Association and CSA America Inc., operating as “CSA Group”American National Standards Institute, Inc.Interprovincial Gas Advisory CouncilApproved on July 28, 2015 by ANSIApproved on August 27, 2015 by IGACEffective i
23、n Canada March 1, 2017Non-metallic dip tubes for use in water heatersANSI Z21.98-2015 CSA 4.10-2015ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes for use in water heatersAugust 2015 2015 CSA Group 1ContentsInterprovincial Gas Advisory Council 2Technical Committee on Performance and Installatio
24、n of Gas Burning Appliances and Related Accessories (Z21/83) 4Technical Committee on Gas Appliances and Related Accessories 7Joint Technical Subcommittee on Standards for Gas-Fired Water Heaters 9Preface 151 Scope 182 Reference publications 193 Definitions 194 Construction 194.1 General 194.2 Markin
25、g 195 Performance 215.1 Linear and lateral deformation and weight loss 215.2 Taste, odor, and color 215.3 Heat deformation from transverse loading 215.4 Immersion 246 Manufacturing and production tests 24Annex A Table of conversion factors 26ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes for u
26、se in water heatersAugust 2015 2015 CSA Group 2Interprovincial Gas Advisory CouncilJ.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 se
27、nd the following information to inquiriescsagroup.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
28、 field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.7) Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Ac
29、tivities page at standardsactivities.csa.ca.ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes for use in water heatersAugust 2015 2015 CSA Group 16History of the development of the Standard for Non-metallic dip tubes for use in water heatersNote: This History is informative and is not part of the
30、 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 for residential, commercial and industrial applications
31、. 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 harmonization of these standards was also seen as a step
32、 toward harmonization with international standards.During its October 1-2, 2008 meeting, the Joint Technical Advisory Group on Standards for Gas-Fired Water Heaters recommended a draft proposed standard, Z21.98 CSA 4.10, be distributed for review and comment as a harmonized standard. The first draft
33、 of the harmonized standard for non-metallic dip tubes for use in water heaters was distributed for review and comment during November 2008.Following reconsideration and modification of the proposed harmonized draft standard for non-metallic dip tubes for use in water heaters, the Joint Technical Ad
34、visory Group on Standards for Gas-Fired Water Heaters at its May 28, 2009 meeting, recommended the proposed standard to the Z21/83 Technical Committee and the CSA Technical Committee on Gas Appliances and Related Equipment for approval.The proposed harmonized standard for non-metallic dip tubes for
35、use in water heaters was approved by the Z21/83 Committee at their meeting on September 28, 2010. The CSA Technical Committee approved the proposed harmonized standard for non-metallic dip tubes for use in water heaters by letter ballot dated May 12, 2011.The first edition of the harmonized Z21/CSA
36、Standard for Non-metallic dip tubes for use in water heaters, Z21.98 CSA 4.10,was approved by the Canadian Interprovincial Gas Advisory Council on March 19, 2012 and by the American National Standards Institute, Inc., on March 30, 2012.The second edition of the harmonized Z21/CSA Standard for Non-me
37、tallic dip tubes for use in water heaters, ANSI Z21.98 CSA 4.10, was approved by the Canadian Interprovincial Gas Advisory Council on August 4, 2014, and by the American National Standards Institute, Inc., on June 24, 2014.This, the third edition of the harmonized Z21/CSA Standard for Non-metallic d
38、ip tubes for use in water heaters, ANSI Z21.98 CSA 4.10, was approved by the Canadian Interprovincial Gas Advisory Council on August 27, 2015, and by the American National Standards Institute, Inc., on July 28, 2015.The previous edition of the Standard for Non-metallic dip tubes for use in water hea
39、ters, and addenda thereto, approved by the Canadian Interprovincial Gas Advisory Council and American National Standards Institute, Inc. are as follows:ANSI Z21.98-2012 CSA 4.10-2012 ANSI Z21.98a-2013 CSA 4.10a-2013ANSI Z21.98-2014 CSA 4.10-2014ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes fo
40、r use in water heatersAugust 2015 2015 CSA Group 17The following identifies the designation and year of the third edition of the Standard:ANSI Z21.98-2015 CSA 4.10-2015Note: This, the 2015 edition of ANSI Z21.98 CSA 4.10 incorporates changes to the 2014 edition. Changes other than editorial, are den
41、oted by a delta in the margin.ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes for use in water heatersAugust 2015 2015 CSA Group 18ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes for use in water heaters1 Scope1.1 This Standard applies to newly produced non-metallic dip tubes intended for
42、use in water heaters.1.2 Compliance of a dip tube with this Standard does not imply that such dip tube is acceptable for use in water heaters without supplemental tests with the dip tube installed in the particular water heater design.1.3 This standard contains SI (Metric) corresponding to the yard/
43、pound quantities, the purpose being to allow the Standard to be used in SI (Metric) units. (American National Standard for Metric Practice, IEEE/ASTM SI 10, or ISO 80000-1:2009, Quantities and units Part 1: General, is used as a guide in making metric conversion from yard/pound quantities.) If a val
44、ue for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units are both specified as a quoted marking requir
45、ement, the first stated unit, or both, are to be provided.1.4 In this Standard, “shall” is used to express a requirement, i.e., a provision that the user shall satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “m
46、ay” is used to express an option or that which is permissible within the limits of the Standard.Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.Notes to ta
47、bles and figures are considered part of the table or figure and may be written as requirements.Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.ANSI Z21.98-2015 CSA 4.10-2015Non-metallic dip tubes for use in water heatersAugust 2015 2015 CSA Gro
48、up 192 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.NSF InternationalNSF/ANSI 14-2012, Plastics Piping System Components and Related MaterialsNSF/ANSI 61
49、-2013, Drinking Water System Components Health Effects3 DefinitionsThe following definitions shall apply in this Standard:Dip tube a tube fitted into a water heater to direct incoming cold water to the bottom of the tank.4 Construction4.1 General4.1.1 Dip tubes shall be provided with an anti-siphoning hole located such that, when the dip tube is installed, the hole shall be within 6 in (152 mm) of the top of the tank. The anti-siphoning hole shall have a minimum in (3.18 mm) diameter or equivalent. 4.1.2 Non-meta
