Millions of liquefied petroleum gas (LPG) cylinders are used worldwide to provide fuel for a wide range of consumer and industrial applications. In the United States and Canada, LPG cylinders are equipped with a CG-7 pressure relief valve designed to discharge and reclose (reseal) after the excessive pressure in the cylinder is reduced to an acceptable level.
The purpose of this publication is to provide:
- Reference material and guidelines to personnel who fill, store, distribute, inspect, maintain, or requalify LPG cylinders and to ensure compliance with applicable safety and regulatory requirements; and
- Information on proper selection, handling, and maintenance of cylinder valves and the CG-7 PRV. This information is limited to U.S. Department of Transportation and Transport Canada refillable cylinder designs.
For the purposes of this publication, LPG includes but is not limited to butane, commercial propane, propylene, and mixtures of these products.
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