NFPA 13 PRESSURE TEST PROCEDURES
NFPA 13 PRESSURE TEST PROCEDURES (Aboveground Fire Systems): A hydrostatic test is a pressure test to reveal the presence of leaks in the piping system. For fire protection systems, the piping is pressurized to 200 psi (13.8 bar) for a period of 2 hours. During this time period, the system piping is inspected for leaks. Leaks in the piping system are revealed either by observation of water droplets or by a reduction in test pressure. Any leaks or reduction in test pressure necessitates a repair of the pipe joint involved and a retest to verify that the leak has been repaired. In cases where high pressure exists, the standard requires that the test pressure be 50 psi (3.5 bar) in excess of the normal system pressure if the resultant test pressure will be greater than 200 psi (13.8 bar).. By NFPA: Unless permitted by 24.2.1.2 through 24.2.1.8, all piping and attached appurtenances subjected to system working pressure shall be hydrostatically tested ...
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