摘要
以断裂力学为方法，以“合乎使用”为原则，在对ＰＴＡ加压罐进行了外观检验、无损检测、应力分析及材料性能分析后，采用流变应力准则，对其焊缝热影响区附近的表面裂纹群进行了安全评定。评定结果表明，在现有的操作压力水平下，含表面裂纹群的在用加压罐可以继续安全使用，不必进行任何返修。
Based on the method of fracture mechanics and the principle of fitness-for-purpose,this paper conducted safe-ty assessment for the multiple surface cracks near the heat influencing region of weld line by means of flowstress criterion through appearance viewing,non-estructive examination,stress analysis and material prop-erties's analysis. The results obtained by safety assessment showed that the vessel with surface cracks in ser-vice could be used safety without any repairment under the level of available operation pressure.
出处
《合成纤维工业》
CAS
CSCD
1995年第4期37-41,共5页
China Synthetic Fiber Industry
关键词
PTA
加压罐
表面裂纹
流变应力
安全评定
accelerated pressure vessel
surface crack
flow stress
safety assessment
