These requirements cover the investigation of products such as@ but not limited to@ sleeve@ wrap or spray-on type fire protection systems of various materials and construction intended to protect rigid piping networks containing combustible liquids from a fire exposure@ such as diesel fuel or heating oil@ that are routed in buildings between the supply tank and utilizing equipment. Under these requirements@ samples of fire resistive pipe protection systems are exposed to a fire exposure for a duration based on a desired hourly rating@ and then to an application of a water hose stream. The fire resistive pipe protection system will also be evaluated for its ability to resist leakage of liquid from the pipe. The following measurements and determinations are made during the fire exposure and water hose stream tests: a) Measurement of temperature on the exposed surface of the outermost pipe of the test specimen. b) Determination of the integrity of the fire resistive pipe protection systems during the fire exposure and water hose stream test. c) Determination of tightness and leakage resistance of the pipe after the fire exposure and water hose stream test. The fire exposure and water hose stream tests may not be representative of all fire conditions. Conditions may vary with changes in the amount@ nature@ and distribution of fire loading@ ventilation@ compartment size and configuration@ and heat conducting and dissipating characteristics of the compartment in which the fire resistive pipe protection system is installed. These requirements provide a relative measure of fire performance of comparable assemblies under these specified fire exposure conditions. Any variation from the construction or operating condition tested@ such as size@ method of assembly@ and materials@ may substantially change the performance characteristics of the system. The classifications for building construction and materials are intended to register performance during the period of fire exposure and are not intended to be interpreted as having determined their acceptability for use after fire exposure. This standard does not evaluate the fuel pipe construction in terms of components or assembly techniques. This is a test to evaluate the fire protection element of the assembly. It is assumed that fuel pipe requirements (e.g. sealing compounds/lubricants etc.) that are established by other codes and standards will be satisfied outside of this test method. These requirements do not cover: a) Accumulation of data as to performance of fire resistive pipe protection systems constructed with components or sizes other than those tested. b) Evaluation of the contribution of the fire resistive pipe protection systems generation of smoke@ toxic gases@ or other products of combustion. c) Measurement of flame spread over the surface of the tested elements. d) Evaluation of the firestop system in openings penetrated by the fire resistive pipe protection systems. Firestop systems for fire resistive pipe protection systems shall be evaluated to the Standard for Fire Tests of Penetration Firestops@ UL 1479. e) Evaluation of the impact of fire and elevated temperatures on the pipe and associated fittings and other construction features. f) Pipe systems that carry fuels with a boiling point below room temperature. g) The compatibility@ including the potential for corrosion@ between the protection system and the pipe material. The results obtained by use of this test method are intended to develop data that will assist designers@ authorities having jurisdiction@ end-users@ installers and others in determining the acceptability@ with reference to fire resistive pipe protection systems for use with specific pipe applications. Tests for burning characteristics of building materials@ based on rate of flame spread and the density of smoke developed when exposed to a standard fire@ can be found in the requirements for surface burning characteristics of building materials in the Standard for Test for Surface Burning Characteristics of Building Materials@ UL 723. Tests for fire resistance of firestop systems which penetrate walls@ floors and other membranes can be found in the requirements for the Standard for Fire Tests of Penetration Firestops@ UL 1479. Application of these test results to predict fire resistance of pipe protection systems in actual installations requires careful evaluation of the pipe and fire resistive pipe protection system materials under normal operating conditions.