1、ANSI Z21.93-2017 CSA 6.30-2017Excess flow valves for natural gas and propane gas with pressures up to 5 psigLegal Notice for StandardsCanadian Standards Association and CSA America, Inc. (operating as “CSA Group”) develop standards thro ugh a consensus standards development pro cess approved by the
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19、ision from previous edition Revision symbol (in margin)Clauses 4.9.1 , 4.9.4 , 4.9.5 , 5.5.2 , 5.5.3 , and 5.5.4Annex AStandards Update ServiceANSI Z21.93-2017 CSA 6.30-2017April 2017Title: Excess flow valves for natural gas and propane gas with pressures up to 5 psigTo regist er for e-mail notifica
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37、.A trademark of the Canadian Standards Association and CSA America Inc., operating as “CSA Group”American National Standards Institute, Inc.Interprovincial Gas Advisory CouncilApproved on April 21, 2017 by ANSIApproved on April 11, 2017 by IGACEffective in Canada May 1, 2018Excess flow valves for na
38、tural gas and propane gas with pressures up to 5 psigANSI Z21.93-2017 CSA 6.30-2017ANSI Z21.93-2017 CSA 6.30-2017Excess flow valves for natural gas and propane gas with pressures up to 5 psigApril 2017 2017 CSA Group 1ContentsInt erpro vincial Gas Advisory Council 3Z21/83 Technical Committ ee on Per
39、formance and Inst allation of Gas Burning Appliances and Relat ed Accessories 5Technical Committ ee on Gas Appliances and Relate d Accessories 8Z21/CSA Joint Technical Subcommitt ee on Standards for Manually Operat ed Gas Valves 11Preface 141 Scope 162 Reference publications 173 Definitions 184 Cons
40、 truction 194.1 General 194.2 Equipment and data to be furnished by the manufacturer 194.3 Connections 204.4 Resis tance to tampering 204.5 Excess flow valves equipped with flare fit tings 204.6 Bolts, nuts and screws 224.7 Adjus tments 224.8 Mat erials 224.9 Ins tructions 234.9.1 General inst ructi
41、ons 234.9.3 Additional ins tructions 244.10 Marking 255 Performance 265.1 General 265.2 Tes t gases 275.3 Strength and deformation 275.3.1 Static pressure t est 275.3.2 Turning effort 285.3.3 Bending movement 295.3.4 Impact t est 295.4 Leakage 315.4.1 Ext ernal leakage 315.4.2 Pin or shaft seal leak
42、age 315.4.3 Int ernal seat leakage 315.5 Trip flow and flow capacity 325.6 Bypass flow rat e 335.7 Reset 345.8 Snap acting load tes t 35ANSI Z21.93-2017 CSA 6.30-2017Excess flow valves for natural gas and propane gas with pressures up to 5 psigApril 2017 2017 CSA Group 25.9 Endurance 355.10 High tem
43、pe rature performance 365.11 Season cracking 365.12 Salt spray 365.13 LP-gas compatibility tes t 365.14 Marking mater ial adhesion and legibility 376 Manufacturing and pr oduction t ests 38Annex A (normative) Calculations 39Annex B (normative) Item s unique to Canada 41Annex C (informative) Developm
44、ent of equations for deter mining gas flow capabilities in accordance with pr ocedures defined in the Standard for Manually operat ed gas valves, ANSI Z21.15/CSA 9.1. 42Annex D (informative) Table of conver sion factors 50Annex E (informative) Temperature scales and conver sions 52ANSI Z21.93-2017 C
45、SA 6.30-2017Excess flow valves for natural gas and propane gas with pressures up to 5 psigApril 2017 2017 CSA Group 3Interprovincial Gas Advisory CouncilJ. Renaud Rgie du btiment du Qubec, Montral, QubecChairA. Ali Government of Nunavut Community b) provide an ex planation of circums tances surround
46、ing the actual field condition; andc) where possible, phrase the reques t in such a way that a specific “yes” or “no” answer will address the issue. Committ ee interp retations are processed in accordance with the CSA Directives and guidelines governing st andardization and are available on the Curr
47、ent Standards Activities page at standardsac tivities.csa.ca .5) This Standard is subject to a review within five years from the dat e of approval. Suggesti ons for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information t
48、o inquiriescsagroup.org and include “Proposal for change” in the subject line: a) Standard designation (number);b) relevant clause, table, and/or figure number;c) wording of the proposed change; andd) rationale for the change.ANSI Z21.93-2017 CSA 6.30-2017Excess flow valves for natural gas and propa
49、ne gas with pressures up to 5 psigApril 2017 2017 CSA Group15History of development of ANSI Z21.93 CSA 6.30Not e: This his to ry is informative and is not part of the s tandard.CSA America, Inc. assumed responsibilities for the CSA Requirements / A.G.A. Requirements to create a managed sy st em, and where appr opriat e, develop a national stand ard. The firs t draft harmonized st andard for excess flow valves was based on the A.G.A. Requirement for Excess Flow Valves, No. 3-92. The draft document was prepared by the Z21/CSA Joint Tec
