Once the piping system passes the pressure test, sweeping shall be carried out prior to the gas leakage test.

管道系统压力试验之后，气体泄漏性试验之前，应进行系统吹扫。

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Carry out regular leakage tests on concealed piping and check for overflowing tanks, waste, worn tap washers and other defects in the water supply system.

定期检查隐蔽水管，以防漏损，检查内部供水系统，修理有毛病的水箱、水头及其他的供水设施。

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A certain type of ship built by Dalian Shipyard due to its complicated structure of propulsion system the fitting-out cycle of the equipment and piping is very long.

大连造船厂承造的某型船舶由于其动力系统结构复杂，设备及管路舾装周期很长。

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