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CGA C 20 : 2014
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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REQUALIFICATION STANDARD FOR METALLIC, DOT AND TC 3-SERIES GAS CYLINDERS AND TUBES USING ULTRASONIC EXAMINATION
09-12-2021
12-01-2013
Specifies and describes the various acceptable UE methods (also known as ultrasonic testing [UT] methods) that may be used in place of internal visual inspection and hydrostatic requalification methods used to examine certain metallic, U.S. DOT/Transport Canada 3-series gas cylinders and tubes as mandated by 49 CFR and TC's Transportation of Dangerous Goods Regulations, and cylinders manufactured under certain DOT special permits or TC equivalency certificates.
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