基于CRACKWISE的X65管线环焊缝焊接缺陷工程临界评估  

Engineering critical assessment on welding flaws of X65 UOE girth weld based on CRACKWISE

作　　者：王怀龙[1] 曹能[1] 钱伟方[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900

出　　处：《宝钢技术》2017年第2期73-78,共6页Baosteel Technology

摘　　要：以X65ф762×28.6 mm管线环焊缝为研究对象,针对管线焊接接头区域不同位置分别进行了CTOD试验,对焊接接头的断裂韧性进行了测定。利用CRACKWISE软件对该管线环焊缝在服役条件下所能接受的缺陷尺寸进行了计算,获得了静荷载服役条件下管线环焊缝中缺陷的最大允许尺寸。结合服役环境中洋流等疲劳荷载的作用,在初始裂纹的基础上对该管线的服役寿命进行了评估,计算出了环焊缝中不同类型缺陷的最大服役寿命,为管线铺设过程中缺陷的修补以及管线服役过程中服役安全性的评判等提供了工程指导。Focused on the girth weld of Ф762 ×28.6 mm（ X65 ） offshore UOE pipe, fracture toughness properties at different position of weld joint had been tested. Meanwhile, the largest size of different cracks under service condition was calculated by using CRACKWISE. Service life of UOE pipe based on an initial size had been calculated with considering fatigue factors such as vibrations caused by ocean current and fluctuations of inner pressure. The assessment process and results can be used to direct repairing of weld flaws laying in pipes or to assess the reliability of in-serving pipes.

关 键 词：工程临界评估 断裂韧性 CTOD 管线 

分 类 号：TG441.7[金属学及工艺—焊接]