在锅炉压力容器定期检验中,经常会发现各种类型的超标缺陷。断裂力学的出现和发展及其工程应用的研究,找到了一种科学评定超标缺陷的手段。在总结断裂力学理论与试验研究的基础上,各国先后制订了“安全评定规范”,用以评定在用设备中实际存在的缺陷。我国于1984年吸收了国外的科研成就,结合本 In the boiler pressure vessel regular inspection, often find various types of excessive defects. The emergence and development of fracture mechanics and its application in engineering have found a means to scientifically evaluate excessive defects. On the basis of summarizing the theory and experimental research of fracture mechanics, various countries have formulated “safety assessment norms” to evaluate the actual defects in the equipment used. Our country absorbed the foreign scientific research achievements in 1984, combined with this