防止超高压管道腐蚀开裂措施的研究  

INVESTIGATION ON MEASURE FOR PREVENTING CORROSION CRACKING ON SUPER HIGH PRESSURE PIPE

作　　者：尹士安 翁必生 田燕[1,2] 谢大吉 

机构地区：[1]北京燕化设备工程有限公司 [2]清华大学

出　　处：《石化技术》1998年第3期152-155,共4页Petrochemical Industry Technology

摘　　要：对高压聚乙烯装置中的４３４０钢超高压厚壁管弯头外表面裂纹的分析表明，裂纹属于冷却水介质中的腐蚀疲劳开裂。冷弯加工造成的残余拉应力促进了裂纹的萌生。分别用电测、盲孔及磁测法测定了Ｇ４３３５Ｖ高强钢厚壁管在冷弯加工过程中及弯后外表面的残余应力和分布，并试验了回火及喷丸措施对降低弯头外表面残余拉应力的效果。Analysis of the cracks on outside surface of 4340 steel super-high pressure thick-walled pipe bend after 17 years service showed that, these cracks are of corrosion-fatigue cracks in cooling water under the affect of residual tensile stress formed in cold bending. By means of blind-hole method and magnetic method, the maximum residual stress on outside surface of G4335V steel thick-walled pipe after cold bending and its distribution were measured. In addition, the effect of tempering and blasting on reducing of the residual stress had been investigated.

关 键 词：高压 聚乙烯装置 管道 腐蚀 防腐 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ050.9