直缝与螺旋缝埋弧焊管静水压爆破试验结果比较研究

Comparative Study on Hydrostatic Burst Test Results of SAWL and SAWH Steel Pipes

统计了46根直缝埋弧焊管、41根螺旋缝埋弧焊管的静水压爆破试验的结果,分析其爆破特征,计算实际屈服压力/理论屈服压力、实际爆破压力/理论抗拉压力、实际最高抗拉压力/理论抗拉压力的比值,分析起爆点和止裂点位置、爆破裂口的方向和长度特征、起爆点在钢管的位置特征等,研究二者的差别。分析认为,直缝与螺旋缝埋弧焊管的综合质量性能良好,都能满足油气长输管道的使用要求,在一些具体细节上略有差异。

Based on the data statistics of the results of the hydrostatic burst tests as made to 46 pieces of the steel pipe and 41 pieces of the SAWL steel pipe the blasting characteristics are analyzed,and the ratios of the actual yield pressure/theoretical yield pressure,actual bursting pressure/theoretical tensile pressure,actual maximum tensile pressure/theoretical tensile pressure are calculated.The difference between the two SAW pipes groups as tested are studied by means of analyzing the positions of the burst point and the crack-stopping point,and the direction and length characteristics of the burst fracture as well as the characteristics of the burst start point position on the steel pipe,etc.It is regarded via the analysis that the comprehensive quality performances of the SAWL and SAWH pipes as tested are good enough to meet the application requirements for long-distance oil/gas transmission pipelines.The only slight differences between the two kinds of saw pipes focus on certain details like the burst start point position on the base steel plate,and the remained wall thickness at the burst start point,etc.