输气管道高强度试压全尺寸爆破实验

Full scale burst experiment on high pressure test of gas pipelines

针对国际上输气管道普遍采用高强度试压的趋势,通过含缺陷管道全尺寸爆破实验及大量统计数据,分析了高强度试压对管道塑性变形及管道承压能力逆转的影响。研究结果表明,对于新建管道,当管道试压产生的环向应力为100%～110%SMYS(规定的最小屈服强度)时,管道不会产生较大的塑性变形,高强度试压引起管道的承压能力逆转量不大。该研究成果可为我国适当提高管道试压压力提供一定的实验数据支持。

High pressure test is universally adopted by the international experts to test pressure for gas pipelines. This paper studied the effect of high pressure test on the plastic deformation and pressure reversal of gas pipelines through full scale burst experiment and a great deal of statistics data. The results indicate that,for the newly built pipelines,there is no major plastic deformation for the gas pipelines while the hoop stress is in the range of 100% to 110% SMYS(specified minimum yield strength),and the pressure reversal caused by high pressure test is not very high. The study results can provide some reliable experimental data for properly increasing the gas pipeline test pressure.