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相对于空气试压法,在高寒低温地区对油气管道进行水试压具有更高的安全性,但需要解决水冻结问题,防冻措施主要包括:采取电伴热系统对试压水进行自动加热,在试压头两端搭建临时御寒帐篷,配备取暖设备等。在试压过程中,采用高压泵对管道升压,通过内置式成套电热系统确保管道温度,利用两台注水量为100 m3/h,扬程为101 m的注水泵向管道注水,并多次发射泡沫清管器清除残水,确保管道内无明水。在不同环境温度下的模拟试验表明:高寒低温地区管道水试压采用电伴热技术可以满足SY 0401-98《输油输气管道线路工程施工及验收规范》中规定的试压验收标准,适用于高寒地区管道分段水试压,完善了高寒地区管道施工技术。
Relative to the air pressure test method, it is more safe to test the pressure of the oil and gas pipelines in cold and cold areas, but it needs to solve the water freezing problem. The antifreeze measures mainly include: Test pressure at both ends to build temporary warm tents, equipped with heating equipment. During the pressure test, the pipeline was pressurized by a high-pressure pump and the temperature of the pipeline was ensured by a built-in electric heating system. Two water injection pumps with a water injection volume of 100 m3 / h and a lift of 101 m were used to inject water into the pipeline and repeatedly launch Foam pigging remove residual water, to ensure that there is no clear water pipe. The simulation tests under different ambient temperatures show that the pressure test of pipeline water in the cold and cold region can meet the pressure test and acceptance criteria in SY 0401-98 “Construction and Acceptance of Oil and Gas Pipeline Project” In the alpine region pipeline water pressure test, improve the alpine region pipeline construction technology.