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Presents the algorithm/flowchart method of determining the correct pressure relief device to be used for gas mixtures in cylinders. The basic algorithm is displayed using both U.S. customary units and SI units. Illustrative examples are included.
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This standard presents a method for selecting pressure relief devices (PRDs) for compressed gas mixtures packaged in cylinders having water capacities of less than or equal to 1000 lb (454 kg) (see U.S. Department of Transportation (DOT) Title 49 of the U.S. Code of Federal Regulations (49 CFR) Part 173.301[f]). This standard also applies to DOT 3AX, 3AAX, and 3T cylinders having water capacities greater than 1000 lb (454 kg) that comply with the specifications, charging, and maintenance regulations of DOT or the corresponding specifications and regulations of Transport Canada (TC).
