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Sprinkler Piping Systems

Fittings, including adjustable drop nipples and flexible sprinkler hose fittings, pipe and pipe hanger equipment, are evaluated to determine their suitability and durability for use in fire-protection sprinkler piping systems. These devices are examined for compliance with construction requirements. Pipe and fitting assemblies are subjected to performance tests, such as leakage, low temperature and bending. Thermoplastic pipe and fitting assemblies are also subjected to hydrostatic pressure tests and assembling tests. Systems intended for exposed installations are subjected to fire exposure tests. Pipe hanger devices are subjected to pull (load) tests.

Test Standards

UL 203 -- Pipe Hanger Equipment for Fire-Protection Service
UL 213 -- Rubber Gasketed Fittings
Subject 852 -- Steel Sprinkler Pipe for Fire-Protection Service
UL 1474 -- Adjustable Drop Nipples
UL 1821 -- Thermoplastic Sprinkler Pipe and Fittings for Fire-Protection Service

Fire sprinkler systems must be designed and installed in accordance with Installation of Sprinkler Systems, NFPA 13, NFPA 13D and/or NFPA 13R.

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