The test described in this procedure shall be used to determine the fire resistance of passive fire protection (PFP) materials applied to the exterior of LP-Gas containers. A.1.1 Thermal protection insulating systems are allowed for use on LP-Gas containers as a means of “Special Protection” in NFPA 58, Liquefied Petroleum Gas Code, and NFPA 59, Utility LP Gas Plant Code. These standards have required that these materials undergo thermal performance testing as a precondition for acceptance. The intent of this testing procedure is to identify insulation systems that retard or prevent the release of the container’s contents in a fire environment of 50 minutes’ duration and that will resist a concurrent hose stream of 10 minutes’ duration. This test method provides a replacement for the test as described in Annex H of NFPA 58 and referenced in NFPA 59.

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