目前,对薄壁管座角焊缝的内部焊接质量还没有成熟的、可靠的检测方法;对小径管焊口仅用射线透照来检查质量,也远不能满足机组安全运行的需要。该项目首先从理论上分析了用超声波对薄壁管座角焊缝和小径管焊缝探伤的可行性并找到了超声波检查的理论依据,进而以理论为指导,设计、制作了一系列 At present, there is no mature and reliable testing method for the internal welding quality of fillet weld of thin-walled pipe. The inspection of the quality of small-diameter pipe welds with radiographs alone can not meet the requirement of safe operation of the unit. The project firstly analyzes the feasibility of using ultrasound to detect flaw welds in thin-walled pipe fillets and small-diameter pipes and finds the theoretical basis of ultrasonic inspection. Then, based on the theory, the project designs and produces a series of