This part of the Pressure Relief Device Standards presents the minimum requirements recommended by the Compressed Gas Association, Inc. (CGA) for pressure relief devices (PRDs) being used on portable containers for compressed gases that comply with the specifications and charging and maintenance regulations of the U.S. Department of Transportation (DOT) or the corresponding specifications and regulations of Transport Canada (TC).

The purpose of this publication is to complement the requirements of various regulations, codes, standards, or specifications applicable to portable containers. In case of conflict, the requirements of the regulations, codes, standards, or specifications of the authorities having jurisdiction over such portable containers shall apply. It is recommended that portable containers fabricated after December 31, 1995, use PRDs that meet the requirements of this edition.