CSA/ANSI Z21.90:19 • CSA 6.24:19

National Standard of Canada American National Standard

Gas convenience outlets and optional enclosures

REVISED MAY 2021

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  Revision History

  CSA/ANSI Z21.90:19 • CSA 6.24:19, Gas convenience outlets and optional enclosures

  
  

  Update No. 1 — May 2021	Revision symbol (in margin)
  Clauses 4.1.8 and 5.21	①

  
  

  Standards Update Service

  CSA/ANSI Z21.90:19 • CSA 6.24:19

  December 2019

  
  

  Title: Gas convenience outlets and optional enclosures

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National Standard of Canada American National Standard

CSA/ANSI Z21.90:19 • CSA 6.24:19

Gas convenience outlets and optional enclosures

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ICS 75.200

ISBN 978-1-4883-1769-9

© 2019 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

CSA/ANSI Z21.90:19 • CSA 6.24:19 Gas convenience outlets and optional enclosures

Contents

Interprovincial Gas Advisory Council 3

Canadian Technical Committee on Gas Appliances and Related Accessories 5

Z21/83 Technical Committee on Performance and Installation of Gas Burning Appliances and Related Accessories 8

Joint Technical Subcommittee on Manually Operated Gas Valves 11

Preface 14

0 Introduction 16

1. Scope 17

   
   

2. Reference publications 17

   
   

3. Definitions 18

   
   

4. Construction 19

   1. General 19

   2. Data to be furnished by the manufacturer 20

   3. Connections 20

   4. Configuration 20

   5. Operation 21

   6. Valve position indication 21

   7. Threads 21

   8. Materials 22

   9. Gas outlet enclosure (optional) 22

   10. Instructions 23

   11. Marking 24

   12. Marking items unique to Canada 26

       
       

5. Performance 26

   1. General 26

   2. Leakage 26

   3. Low temperature operation 28

   4. Non-displaceable valve members 29

   5. Connection and disconnection at room temperature 29

   6. Flow capacity 29

   7. Continued operation 31

   8. Drop test 31

   9. Support strength 32

   10. Impact strength 33

   11. Pull strength 34

   12. Fire hazard resistance 35

   13. Resistance to permanent damage at excessive supply pressure 35

       
       

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   14. Thermal shutoff 35

   15. Side load 36

   16. Turning strength 37

   17. Static load 38

   18. Valve member seating test 39

   19. Marking material adhesion and legibility 39

   20. Corrosion resistance test 40

   21. — Deleted 40

   22. Load test 40

       
       

6. Manufacturing and production tests 40

Annex A (informative) — Table of conversion factors 42

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CSA/ANSI Z21.90:19 • CSA 6.24:19 Gas convenience outlets and optional enclosures

Preface

This is the third edition of CSA/ANSI Z21.90 • CSA 6.24, Gas Convenience Outlets and Optional Enclosures. It supersedes the previous editions published in 2015 and 2001.

The third edition of this Standard has been updated to reflect current industry practice, and address CSA Group’s guide on drafting Standards. Major changes to this edition include the following:

1. Clause 4.1.8 has been added for cleaner installation closer to a gas appliance so connections will not be a tripping hazard in patio applications;

2. a reference has been included to the International Fuel Gas Code (IFGC) where the National Fuel Gas Code is referenced within the Standard;

3. the Instructions section has been updated to remove the mandate of including the certification body in the instructions;

4. materials permitted within the Marking section have been clarified; and

5. a method of test has been included for impact strength, corrosion resistance, strength, and load.

   This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

   
   

   This Standard was prepared by the Joint Technical Subcommittee on Manually Operated Gas Valves under the jurisdiction of the Z21/83 Technical Committee on Performance and Installation of Gas Burning Appliances and Related Accessories and the Strategic Steering Committee on Fuels and Appliances. It has been formally approved by the Z21/83 Technical Committee, the Canadian Technical Committee on Gas Appliances and Related Accessories, and the Interprovincial Gas Advisory Council.

   
   

   This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. This Standard has been approved by the American National Standards Institute (ANSI) as an American National Standard.

   
   

   Interpretations: The Strategic Steering Committee on Fuels and Appliances has provided the following direction for the interpretation of standards under its jurisdiction: “The literal text shall be used in judging compliance of products with the safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant CSA committee interpretation has not already been published, CSA Group’s procedures for interpretation shall be followed to determine the intended safety principle.”

   Notes:

   1. Use of the singular does not exclude the plural (and vice versa) when the sense allows.

   2. Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

   3. This Standard was developed by consensus, which is defined by CSA Policy governing standardization – Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity.” It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

   4. To submit a request for interpretation of this Standard, please send the following information to

      inquiries@csagroup.org and include “Request for interpretation” in the subject line:

      1. define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;

      2. provide an explanation of circumstances surrounding the actual field condition; and

      3. where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.

         
         

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         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.ca.

   5. This Standard is subject to review within five years from the date of publication. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiries@csagroup.org and include “Proposal for change” in the subject line:

      1. Standard designation (number)

      2. relevant clause, table, and/or figure number;

      3. wording of the proposed change; and

      4. rationale for the change.

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CSA/ANSI Z21.90:19 • CSA 6.24:19 Gas convenience outlets and optional enclosures

CSA/ANSI Z21.90:19 • CSA 6.24:19

Gas convenience outlets and optional enclosures

0 Introduction

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. 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 toward harmonization with international standards. Joint subcommittees were established to facilitate the standards harmonization process between the United States and Canada.

The draft harmonized standard for Gas Convenience Outlets and Optional Enclosures, Z21.90•CSA 6.24, was first adopted for public review and comment by the Z21/(Interim CSA) Joint Manual Valve Subcommittee at its Meeting of March 10-11, 1998 and issued for public review on July 27, 1998.

Following reconsideration and modification of the proposed draft standard, in light of comments received, by the joint subcommittee at its March 16, 1999 meeting, substantive revisions were re-issued for public review on April 5, 2000; comments and criticisms were considered by the subcommittee at its meeting of June 15, 2000. The subcommittee recommended the proposed draft standard to the Accredited Standards Committee Z21/83 and the (Interim CSA) Standards Steering Committee on

June 16, 2000.

The proposed draft of the harmonized standard for gas convenience outlets and optional enclosures, as modified by the joint subcommittee, was approved by the Z21/83 Committee by letter ballot on

January 22, 2001, and by the CSA Technical Committee on Gas Appliances and Related Accessories by letter ballot dated December 19, 2000.

The first edition of the American National Standard/CSA Standard for Gas Convenience Outlets and Optional Enclosures was approved by the Canadian Interprovincial Gas Advisory Council on June 25, 2001, and by the American National Standards Institute, Inc., on August 31, 2001.

The second edition of the Standard for Gas Convenience Outlets and Optional Enclosures was approved by the Canadian Interprovincial Gas Advisory Council on March 16, 2015, and by the American National Standards Institute, Inc., on September 1, 2015.

This, the third edition of the Standard for Gas Convenience Outlets and Optional Enclosures, was approved by the Canadian Interprovincial Gas Advisory Council on September 22, 2019, and by the American National Standards Institute, Inc., on November 11, 2019.

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CSA/ANSI Z21.90:19 • CSA 6.24:19 Gas convenience outlets and optional enclosures

1. Scope

   
   

   1.1

   This Standard applies to gas convenience outlets, hereinafter referred to as gas outlets and optional enclosures, not to exceed 1-1/2 in (38.1 mm) and pressures not to exceed 5 psi (34.5 kPa), capable of operation at temperatures between 32 °F and 200 °F (0 °C and 93.3 °C) if intended for indoor use only, or between –20 °F and 200 °F (–28.8 °C and 93.3 °C) if intended for indoor/outdoor use. Indoor/outdoor use is also to be capable of operation at –40 °F (–40 °C) when so specified by the manufacturer.

   
   

   1.2

   This Standard sets forth the minimum capabilities, characteristics, and properties that a gas outlet and optional enclosure must possess, at the time of manufacture, in order to be considered suitable for use in a gas piping system. Details of design and manufacture not stated in these requirements, including such design and production tests that will produce gas outlets that meet these requirements, remain the responsibility of the manufacturer.

   
   

   1.3

   All references to pressure throughout this Standard are to be considered gauge pressure, unless otherwise specified.

   
   

   1.4

   This Standard contains SI (Metric) units corresponding to the yard/pound quantities, the purpose being to allow the standard to be used in SI (Metric) units. (IEEE/ASTM SI 10 or ISO 80000-1 is used as a guide in making metric conversion from yard/pound quantities.) If a value 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 requirement, the first stated unit, or both, are to be provided.

   
   

   1.5

   In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” 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 tables 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.

   
   

2. Reference publications

This 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.

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