本文结合缅甸电源电站的特殊性及压力钢管制造安装的实际情况,优选了爆炸法作为焊接残余应力消除方法并在压力钢管岔管段上应用,显著降低焊接残余应力。通过对比爆炸法处理前后岔管焊接残余应力变化请和检查结果,证明了爆炸法消除焊接残余应力在水电站压力钢管上的应用可行可靠。 Based on the particularity of Burma power station and the actual situation of manufacture and installation of pressure pipe, blasting method is selected as the method to eliminate welding residual stress and applied to the pipe section of the pressure pipe to reduce the welding residual stress significantly. By comparing the welding residual stress change of the bifurcated pipe before and after the blasting and the inspection results, it is proved that the explosive method can eliminate the welding residual stress and is feasible and reliable in the application of the pressure pipe of hydropower station.