Method for formulating metal weld joint service defect receiving table

The invention discloses a method for formulating a metal weld joint service defect receiving table. The method is used for acquiring an acceptable size threshold value of a service defect of a welding joint on a safety end or a main pipeline of a pressure container in nondestructive testing. The method comprises the following steps: firstly, acquiring material performance parameter data, initial safety margin, load analysis data, an expansion amount a and a material yield strength cyclic hardening rate gamma obtained through operation; then obtaining the end-of-life safety margin of the pressure vessel according to the data, and verifying the end-of-life safety margin through historical defect data; and finally, according to the current defect data, obtaining an acceptable size threshold value of the service defect of the welding joint at the end of the service life of the pressure container. According to the method, a metal weld joint service defect receiving table is formulated based on a local mechanical p