Weak current College】 【pipeline pressure test programme.

<br> <br> Pipe pressure test conducted in two phases, namely the pilot stage and the primary pilot phase. <br> <br> 1. the pilot phase, the steps are as follows. <br> <br> (1 .) the pressure pipes within the pressure dropped to atmospheric pressure, and 60 minutes. This period of time to ensure no air into the pipeline. <br> <br> (2) slowly pipeline booster to test pressure regulator and 30 minutes, if the .pressure drops during may water injection compaction (but no more than the test pressure). Check the pipe interface. Parts Department has no leakage phenomenon (pressure test if you stop and identify the reasons for taking the appropriate measures and organization pressure test). < .br> <br> (3) stopping the infusion compaction and stable 60 minutes. If 60 minutes after the pressure dropped to a test pressure of 70% or more, the pilot phase of the end. If 60 minutes after the pressure dropped to a .test pressure of 70%, stop pressure test, and identify the reasons for adopting measures to pressure testing organization. <br> <br> 2. c: phase, the steps are as follows. At the end of the pilot phase, step- .down swift will pipe discharge, Buck of test pressure of 10-15%. Every 3 minutes remaining pressure pipeline, a total of 30 minutes. If this 30 minutes the pressure pipeline remaining pressure on an upward trend, the hydrostatic test results. If within .30 minutes the pressure pipes within the residual hydraulic pressure no upward trend, then continuing observation of 60 minutes. As in the whole 90 minutes pressure drops do not exceed 0.02MPa, hydraulic test results. The main pilot phase if the above two are not met ., the hydrostatic test results are not eligible. Shall identify the reasons for taking the appropriate measures and organization pressure test. Fire fighting water supply network pressure test fails construction plan and specification requirements. Pipe pressure test score leak repair and strength tests carried out in two .steps. Leak in atmospheric or slightly up pressure state and pressure strength test points and test pressure in two phases. At present, some sites are only for pipeline leak test or the test pressure is not in conformity with the design and specification requirements so that the .normal operation of the system brought trouble. In accordance with the specifications, network installation has been completed, should be strength and tightness test. For potable water and fire water pipe, test pressure for the pipe work pressure of 1.5 times, and not less than .0.6MPa. Strength test is under the pressure of the pipeline network in experimental 10min, pressure drop is not greater than 0.05MPa is qualified. Then the test pressure slowly fall to work under pressure, check no leakage, the tightness test is qualified. For .automatic sprinkler system. When the design working pressure ¡ .ü1 .0 MPa, water pressure strength test pressure is the pressure of the design work, and not 1.5 times lower than 1.4MPa; when the design pressure> 1.0MPa, water pressure strength test pressure shall be the working pressure 0.4MPa. Water pressure strength .test is under the pressure of the pipeline network in the experiment, pressure stability 30min not greater than 0.05MPa is qualified. While the pressure tightness test should water pressure strength test and pipeline flush after passing the test pressure shall be designed to work under pressure regulator .24h, no leakage is qualified. <br> <br> Pressure testing equipment <br> <br> Pump, pump, pressure gauge, with blocking flange, and the inlet and outlet and auxiliary valve. <br> <br> Pressure test .steps <br> <br> (1) all the pressure pipe plugging the distribution point, slow-flooding and will air exhaust pipes; <br> <br> (2) pipe full of water, water tightness checks; <br> < .br> (3) on the system pressure should be slowly boost, boost time should not be less than 10min; <br> <br> (4) force pump step-up to the provisions of the stop after the test pressure, pressure, .pressure regulator 1h shall not exceed 0.05MPa; otherwise check after unloading. <br> <br> (5) in the working pressure of 1.15 times the State regulator 2h, shall not exceed the pressure drop, also check the 0.03MPa connections, no .leakage. Otherwise be checked after unloading, repeat the above steps until you meet the requirements. <br> <br> (6) test after passing the test records, fill out and sign. <br> <br> Polyethylene PE water supply pipe .pressure test pressure test, the pressure too high, should not be too high, otherwise it will produce micro expansion, causing the water pressure test of the error, you must strictly follow the specifications. <br> <br> 3D-SY portable electric .pressure test pump <br> <br> 3D-SY portable electric pump for horizontal three plunger pump, adjustable pressure. With 220V single phase power, easy to use. For similar products in the weight of 1 / 4, compact structure, easy to .carry. 3D-SY portable electric pump dimensions: 470mm (L) × 170mm (W) × 340mm (T) <br> <br>.