由吉林化工学院、吉化压检中心合作的项目──压力容器焊缝区缺陷安全评定试验研究项目于1997年底通过省级鉴定。该项目用弹塑性断裂力学J积分的失效评定曲线方法，对压力容器焊缝区缺陷进行评定。内容包括焊缝区有平行、垂直裂纹以及等匹配或不匹配焊接接头有各类缺陷时进行安 The joint project of the Jilin Institute of Chemical Technology and the Jilin Chemical Pressure Testing Center, the project of safety assessment of weld vessel zone welds in pressure vessels, passed the provincial appraisal at the end of 1997. In this project, the J-integral failure assessment curve method of elasto-plastic fracture mechanics was used to evaluate the defects in the weld zone of the pressure vessel. Contents include parallel and vertical cracks in the weld zone, and matching or non-mating weld joints with various defects