【UL标准】UL 2522003 Compressed Gas Regulators.doc

UL 252ISBN 0-7629-0841-6Compressed Gas RegulatorsThis PDF Standard downloaded from OCTOBER 10, 2003 UL 252tr1Underwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for Safety for Compressed Gas Regulators, UL 252Eighth Edition, Dated October 10, 2003SUMMARY OF TOPICSThis new edition is a periodic re-issuance to ensure that ULs Standards remain up-to-date with regard to format and editorial issues such as renumbering, repaginating, correction of editorial errors, correction of cross-references and updating titles of referenced Standards. Revisionsto UL 252 reflect the discontinued use of cadmium plating in compressed gas regulator accessories and the replacement of ASTM No. 3 Swelling Oil with IRM 903 as stated in the bulletin dated April 9, 2003.UL Standards for Safety are developed and maintained in the Standard Generalized Markup Language (SGML). 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October 10, 2003trOCTOBER 10, 2003 UL 252This PDF Standard downloaded from No Text on This PageOCTOBER 10, 20031UL 252ANSI/UL 252-2003Standard for Compressed Gas RegulatorsThe first and second editions were titled Standard for Pressure Regulators or Reducing Valves and numbered UL 252C. The third and fourth editions were titled Gas Pressure Regulators.First Edition March, 1928Second Edition May, 1951Third Edition August, 1960Fourth Edition May, 1973Fifth Edition December, 1979Sixth Edition June, 1984Seventh Edition April, 1996Eighth EditionOctober 10, 2003The most recent designation of ANSI/UL 252 as an American National Standard(ANSI) occurred on September 2, 2003.This ANSI/UL Standard for Safety, which consists of the Eighth edition with revisions through October 10, 2003 is under continuous maintenance, whereby each revision is ANSI approved upon publication. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Written comments are to be sent to UL-SC Standards Department, 1655 Scott Blvd, Santa Clara, CA 95050.An effective date included as a note immediately following certain requirements is one established by Underwriters Laboratories Inc.The Department of Defense (DoD) has adopted UL 252 on September 26, 1988. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption.Revisions of this Standard will be made by issuing revised or additional pages bearing their date of issue. A UL Standard is current only if it incorporates the most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements.ISBN 0-7629-0841-6COPYRIGHT © 1979, 2003 UNDERWRITERS LABORATORIES INC.OCTOBER 10, 2003COMPRESSED GAS REGULATORS - UL 2523This PDF Standard downloaded from No Text on This PageCONTENTSFOREWORD . .6INTRODUCTION1 Scope . .72 General . .72.1 Components . .72.2 Units of measurement . .82.3 Undated references . .83 Glossary . .8CONSTRUCTION4 Assembly . .95 Materials . .96 Connections . .107 Accessories . .11PERFORMANCE8 General . .119 Seat- and External-Leakage Test . .1110 Excess-Pressure Test . .1311 Endurance Test . .1312 Volume-Change and Weight-Loss Tests . .1412.1 General . .1412.2 Tests using n-Hexane and IRM 903 Oil . .1412.3 Tests using liquid MPS . .1513 Accelerated-Aging Test . .1614 Comparative Corrosion Tests . .1614.1 General . .1614.2 Tests in the presence of salt spray (fog) . .1614.3 Tests in the presence of moist hydrogen sulfide-air mixture . .1714.4 Tests in the presence of moist sulfur dioxide-carbon dioxide-air mixture . .17MANUFACTURING AND PRODUCTION TESTS15 General . .17MARKING AND INSTRUCTIONS16 General . .1817 Instructions . .18OCTOBER 10, 2003COMPRESSED GAS REGULATORS - UL 2525This PDF Standard downloaded from SUPPLEMENT SA - OXYGEN AND ACETYLENE WELDING REGULATORS FOR USE UNDER FEDERAL AGENCY REGULATIONSINTRODUCTIONSA1 Scope . .SA1SA2 Glossary . .SA1CONSTRUCTIONSA3 General . .SA1SA4 Connections . .SA2SA5 Relief Valves . .SA3SA6 Pressure Gauges . .SA3PERFORMANCESA7 General . .SA3SA8 Performance Characteristics Test . .SA4SA9 Pressure Regulation Test . .SA4SA10 Flow Regulation Test . .SA4SA11 Static Increment (Lock-Up) Test . .SA5SA12 Flow Capacity Test . .SA5SA13 Proof Pressure Test . .SA6SA14 Burst Pressure Test . .SA6SA15 Endurance Test . .SA6SA16 Immersion Tests . .SA7APPENDIX AStandards for Components. A1No Text on This PageOCTOBER 10, 2003COMPRESSED GAS REGULATORS - UL 2527This PDF Standard downloaded from FOREWORDA. This Standard contains basic requirements for products covered by Unde