厦门科恒塑胶有限公司

xiamen keheng plastic co.,ltd

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Hydrostatic Pressure Testing Notification of UPVC/CVPC Pipes

2.2.1 Cemented pipes must be tested 48 hours after installation. If pipes are installed underground, the test must be done after the trench is backfilled.
2.2.2 Support to tees, elbows, and fitting stops in the end must be stable. Thrust block made of concrete must be cured completely before test.
2.2.3 The end of the system should be blocked. Then, the system must be filled slowly with water, venting air from valves at piping run ends and at elevations during the filling process.
2.2.4 After the system is filled with water, make watertight test.
2.2.5 Hand pump or electro pump is used to rise up the pressure. The process must be slowly, more than 10 mins.
2.2.6 After rising up to the test pressure, hold it for 1 hour to check if there is leakage. If the pressure lowers down, rise up the pressure again. Within 15mins, if the pressure lowers smaller than 0.05MPA, the result is qualified.