This publication describes the recommended industry practices and precautionary measures for filling certain liquefied and nonliquefied, nonflammable industrial, medical and food gas cylinders not exceeding 125-lb (57-kg) water capacity. It should not be assumed that every safety precaution is included here. This publication does not cover equipment design specifications to perform these filling operations.
This publication only covers the filling of U.S. Department of Transportation (DOT) 3A, Transport Canada (TC) 3AM, DOT 3AA, TC 3AAM, DOT 3AL, TC 3ALM, authorized United Nations (UN) equivalents for these cylinders, and aluminum composite cylinders with the following gases: air, argon, carbon dioxide, helium, nitrogen, nitrous oxide, and oxygen.
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