CGA-C-13-2009.pdf
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1、 CGA C-132009 GUIDELINES FOR PERIODIC VISUAL INSPECTION AND REQUALIFICATION OF ACETYLENE CYLINDERS SIXTH EDITION COMPRESSED GAS ASSOCIATION, INC. 4221 Walney Road, 5th Floor Chantilly, VA 20151 Phone: 703-788-2700 Fax: 703-961-1831 E-mail: PAGE ii COMPRESSED GAS ASSOCIATION, INC. CGA C-132009 PLEAS
2、E NOTE: The information contained in this document was obtained from sources believed to be reliable and is based on tech- nical information and experience currently available from members of the Compressed Gas Association, Inc. and others. However, the Association or its members, jointly or several
3、ly, make no guarantee of the results and assume no liability or responsibility in connection with the information or suggestions herein contained. Moreover, it should not be assumed that every acceptable commodity grade, test or safety procedure or method, precaution, equipment or device is containe
4、d within, or that abnormal or unusual circumstances may not warrant or suggest further require- ments or additional procedure. This document is subject to periodic review, and users are cautioned to obtain the latest edition. The Association in- vites comments and suggestions for consideration. In c
5、onnection with such review, any such comments or sugges- tions will be fully reviewed by the Association after giving the party, upon request, a reasonable opportunity to be heard. Proposed changes may be submitted via the Internet at our web site, . This document should not be confused with Federal
6、, state, provincial, or municipal specifications or regulations; in- surance requirements; or national safety codes. While the Association recommends reference to or use of this docu- ment by government agencies and others, this document is purely voluntary and not binding. A listing of all publicat
7、ions, audiovisual programs, safety and technical bulletins, and safety posters is available via the Internet at our website at . For more information contact CGA at Phone: 703-788-2700, ext. 799. E-mail: . Work item 08-043 Acetylene Committee NOTETechnical changes from the previous edition are under
8、lined. NOTEAppendices A and B (Informative) are for information only. SIXTH EDITION: 2009 FIFTH EDITION: 2006 FOURTH EDITION: 2000 THIRD EDITION: 1992 SECOND EDITION: 1985 2009 The Compressed Gas Association, Inc. All rights reserved. All materials contained in this work are protected by United Stat
9、es and international copyright laws. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical including photocopying, recording, or any informa- tion storage and retrieval system without permission in writing from The Compressed Gas Association, Inc
10、. All requests for permission to reproduce material from this work should be directed to The Compressed Gas Association, Inc., 4221 Walney Road, Suite 500, Chantilly VA 20151. You may not alter or remove any trademark, copyright or other notice from this work. -,-,- CGA C-132009 COMPRESSED GAS ASSOC
11、IATION, INC. PAGE iii Contents Page 1 Introduction.1 2 Scope and purpose1 2.1 Scope 1 2.2 Purpose.1 3 Definitions.1 4 Compliance schedule.3 5 Necessary inspection experience.3 6 Construction of acetylene cylinders3 6.1 Porous mass (filler)3 6.2 Solvent.4 6.3 Core-hole with packing4 6.4 Fusible metal
12、 pressure relief device (fuse plug)5 6.5 Shell.5 7 Acetylene cylinder inspection.5 7.1 Prefill cylinder inspection.5 7.2 Filling and postfilling inspection.6 8 Acetylene cylinder requalification.6 8.1 Authorized inspectors6 8.2 Cylinder inspection equipment 6 8.3 Inspection for unauthorized cylinder
13、 shell repairs .7 8.4 External inspection of acetylene cylinder shells7 8.5 Inspection of acetylene cylinder porous mass.16 8.6 Inspection markings.18 8.7 Sample visual inspection and requalification report 19 9 References.19 10 Additional references19 Tables Table 1Minimum allowable wall thickness
14、required by DOT or TC specifications.2 Table 2Compliance schedule 3 Table 3Minimum wall thickness at defect for acetylene cylinders Specification 8AL 7 Table 4Minimum wall thickness at defect for acetylene cylinders Specification 8.8 Table 5Maximum allowable defect depth for acetylene cylinders Spec
15、ification 8AL.8 Table 6Maximum allowable defect depth for acetylene cylinders Specification 8.9 Table 7Maximum top head-to-porous mass clearance for nonmonolithic and monolithic porous mass cylinders.12 Figures Figure 1Top clearance of monolithic filler cylinder 4 Figure 2Isolated pitting 9 Figure 3
16、Line corrosion.10 Figure 4Crevice corrosion near the cylinder footring.10 Figure 5General corrosion with isolated pitting on cylinder sidewall .11 Figure 6General corrosion with pitting on bottom head.11 Figure 7Measuring the length and depth of typical dent13 -,-,- PAGE iv COMPRESSED GAS ASSOCIATIO
17、N, INC. CGA C-132009 Figure 8Cylinders manufactured with bottom head convex to pressure that have become bulged (partial bulge or reverse bending of the bottom)14 Figure 9Press-fit footring cylinder head-to-sidewall inside weld16 Figure 10Typical clearance gauge 17 Figure 11Method of checking B and
18、MC cylinders18 Appendices Appendix AChart of chronological history of acetylene cylinder construction (Informative) 20 Appendix BAcetylene cylinder periodic visual inspection and requalification report (Informative)21 -,-,- CGA C-132009 Compressed Gas Association, Inc. Page 1 1 Introduction This pub
19、lication is one of a series compiled by the Compressed Gas Association, Inc. (CGA) to meet the de- mand for information on compressed gases, cryogenic liquids, and related products. 2 Scope and purpose 2.1 Scope This publication has been prepared as a guide for the inspection and requalification of
20、the acetylene cylinder shell and porous mass. It should be of interest to acetylene cylinder manufacturers, acetylene cylinder filling and distribution personnel, authorized acetylene cylinder reinspection facilities, welding gas distributors, safety personnel, and users of acetylene. 2.2 Purpose Th
21、is publication covers both a thorough external prefill visual inspection of acetylene cylinders and the periodic inspections of the cylinder shell and porous mass, which are required for acetylene cylinder requalification. The guidelines contained in this publication apply to acetylene cylinders man
22、ufactured: under U.S. Department of Transportation (DOT) Specifications 8 and 8AL found in Title 49 of the U.S. Code of Federal Regulations (49 CFR) Parts 178.59 and 178.60 1;1 under Specifications TC-8WM and TC-8WAM found in Canadian Standards Association (CSA) B339, Cyl- inder, Spheres, Tubes and
23、Other Containers for the Transportation of Dangerous Goods 2; and required for service by the Transportation of Dangerous Goods Regulations of Transport Canada (TC) and CSA B340, Selection of Cylinders, Spheres, Tubes, and Other Containers for the Transportation of Dan- gerous Goods, Class 2 3, 4. U
24、ntil 1970, U.S. regulations applicable to acetylene cylinders were under the authority of the Interstate Com- merce Commission (ICC). Those cylinders identified by an ICC stamping are now regulated according to DOT requirements. In Canada, the CSA standards came into effect in 1987. Before 1987, oth
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