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36、itute, Inc.Interprovincial Gas Advisory CouncilExcess flow valves for natural and LPgas with pressures up to 5 psigANSI Z21.93-13/CSA 6.30-13ANSI Z21.93-13/CSA 6.30-13Excess flow valves for natural and LPgas with pressures up to 5 psigMarch 2013 2013 CSA Group 1ContentsInterprovincial Gas Advisory C
37、ouncil 3Z21/83 Technical Committee on Performance and Installation of Gas Burning Appliances and Related Accessories 5Technical Committee on Gas Appliances and Related Accessories 8Z21/CSA Joint Technical Advisory Group on Standards for Manually Operated Gas Valves 10Preface 131 Scope 152 Reference
38、publications 163 Definitions 174 Construction 184.1 General 184.2 Equipment and data to be furnished by the manufacturer 194.3 Connections 194.4 Resistance to tampering 194.5 Excess flow valves equipped with flare fittings 194.6 Bolts, nuts and screws 214.7 Adjustments 214.8 Materials 214.9 Instruct
39、ions 224.9.1 General instructions 224.9.3 Additional instructions 234.10 Marking 235 Performance 255.1 General 255.2 Test gases 265.3 Strength and deformation 265.3.1 Static pressure test 265.3.2 Turning effort 275.3.3 Bending movement 285.3.4 Impact test 285.4 Leakage 305.4.1 External leakage 305.4
40、.2 Pin or shaft seal leakage 305.4.3 Internal seat leakage 305.5 Trip flow and flow capacity 315.6 Bypass flow Rate 325.7 Reset 335.8 Snap acting load test 34ANSI Z21.93-13/CSA 6.30-13Excess flow valves for natural and LPgas with pressures up to 5 psigMarch 2013 2013 CSA Group 25.9 Endurance 345.10
41、High temperature performance 355.11 Season cracking 355.12 Salt spray 355.13 LP-gas compatibility test 355.14 Marking material adhesion and legibility 366 Manufacturing and production tests 37Annex A (normative) Flow capacity calculations 38Annex B (normative) Items unique to Canada 40Annex C (infor
42、mative) Development of equations for determining gas flow capabilities in accordance with procedures defined in the Standard for Manually operated gas valves, ANSI Z21.15/CSA 9.1. 41Annex D (informative) Table of conversion factors 49Annex E (informative) Temperature scales and conversions 51ANSI Z2
43、1.93-13/CSA 6.30-13Excess flow valves for natural and LPgas with pressures up to 5 psigMarch 2013 2013 CSA Group 3Interprovincial Gas Advisory CouncilJ. Renaud Rgie du btiment du Qubec, Montral, QuebecChairA. Ali Government of Nunavut Community b) provide an explanation of circumstances surrounding
44、the actual field condition; andc) where possible, 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 Stand
45、ards Activities page at standardsactivities.csa.ca.5) This Standard is subject to a review within five years from the date of approval. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiriescs
46、agroup.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 Z21.93-13/CSA 6.30-13Excess flow valves for natural and LPgas with pressures up to
47、5 psigMarch 2013 2013 CSA Group 14History of development of ANSI Z21.93/CSA 6.30Note: This history is informative and is not part of the standard.CSA America, Inc. assumed responsibilities for the CSA Requirements / A.G.A. Requirements to create a managed system, and where appropriate, develop a nat
48、ional standard. The first draft harmonized standard 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 Technical Advisory Group (TAG) on Standards for Manually Operated Gas Valves in 2003.The proposed draf
49、t standard for excess flow valves for natural and LP gas with pressures up to 5 psig was distributed for review and comment during 2007. Following reconsideration and modification of the proposed standard, based on comments received, the Z21/CSA Joint Manually Operated Gas Valves TAG, at its June 26, 2012 meeting, recommended the proposed standard to the Z21/83 Committee and the CSA Technical Committee for approval.The proposed harmonized standard for excess flow valves for natural and LP gas with pressures up to 5 psig was approved by the Z21/8
