1997-07-21_GENERAL DOCUMENTS - M1977493

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07/21/1997 08:45 3035724444 CROW COMPANY PAGE 04 Monitored Make-up Water Test WARMNG. Explosive Failure. Piping system rupture dsWag pneumatic pressure testing may The test procedure consists of initial expansion, result in the explosive,uncontrolled movement and test phases. During the initial expansion of system piping,or components,or parts of phase,the test section is pressurized to the test components Keep personnel a safe distance pressure,and enough make-up liquid is added away from the test section daring testing. each hour for three(3)hours to return to test Pneumatic testing(testing with a gas under pressure. pressure)should not be considered unless one of The test phase follows immediately,and may be the following conditions exist: one(1).two(2).or three(3)hours. At the end of the test time,the test section is returned to test • when the piping system is so designed that is pressure by adding a measured amount of liquid. cannot be filled with liquid;or If the amount of make-up liquid added does not • where the system service cannot exceed Table 1 values.leakage is not indicated. piping y tolerate traces of a liquid testing medium. The testing medium should be non-flammable and Non-monitored Make-Up Water Test non-toxic.The test pressure should not exceed the maximum allowable test pressure for any The test procedure consists of initial expansion, non-isolated component in the test section. and test phases. For the initial expansion phase, Leaks may be detected using mild soap and water • makeup water is added as required to maintain ft solutions(detergents should be avoided),or other test pressure for three(3)hours. For the test acceptable leak detecting fluids,applied to the phase,the test pressure is reduced by 10 psi. If joint. Bubbles indicate leakage. After leak the pressure remains steady(within 5%of the testing,all soap solutions or leak detecting fluids target value)for an hour,no leakage is indicated. should be rinsed off the system with clean water. PNEUMATIC TESTING High Pressure Procedure For continuous pressure rated pipe systems,the Guidelines pressure in the test section should be gradually increased to not more than one-half the test CAUTION., Pneumatic testing should not be pressure,then increased in small Increments until used unless the Owner and the responsible the required test pressure is reached. Test Project Engineer specify pneumatic testing or pressure should be maintained for ten(10)to sixty approve Its use as an alternative to hydrostatic (60)minutes,then reduced to the design pressure testing, rating,and held for such time as required to PIPING SYSTEM PRESSURE TESTING examine the system for leaks. USING PNEUMATIC TESTING IS NOT RECOMMENDED, WARNING. Compressed air or any pressurized gas used as a test medium may present severe hazards to personnel near lines being tested take extra personnel protection precautions when a gas under pressure It used as the test medhun.