Welding materials are often used in the manufacturing process of nuclear power equipment

and also the weak link of nuclear power quality management. With the introduction of the third generation of passive nuclear power technology

ASME（American Society of Mechanical Engineers）code is gradually widely used in the design and manufacture of nuclear power equipment in China

and the use of ASME Code welding materials is increasingly widespread. However

in the process of practice

many domestic nuclear power equipment manufacturers still have misunderstanding and confusion in the use of ASME Code welding materials

especially the impact test requirements in the re inspection of welding materials. Charpy impact test is an important test to evaluate the toughness and notch sensitivity of materials. The impact test performance of welding materials directly affects the quality of nuclear equipment and nuclear safety. Combined with practical cases

the impact test requirements in the inspection of ASME welding materials are analyzed

and the correct standard execution requirements are pointed out

so as to provide reference experience for the construction process of similar projects.