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王建平１，霍立兴２，许永泰１，刘长振１
（１．中国北方发动机研究所，山西 大同 ０３７０３６；２．天津大学材料科学与工程学院，天津 ３０００７２）
摘要：以旅顺—大连间海底油气外输管线为例，依据英国标准BS７９１０对管线铺设过程的断裂及疲劳性能进行了ECA评估，得到了不同水深、不同缺陷形式和位置及不同错边量条件下管道焊接接头部位缺陷的断裂临界尺寸和使用寿命，为海底管线铺设工程中的焊接缺陷的验收和拒收提供了依据。
关键词：BS７９１０；管线钢；ECA；疲劳寿命
Fracture and Fatigue Assessment on Offshore Gas and Oil Pipeline
WANG Jian-ping１，HUO Li-xing２，XU Yong-tai１，LIU Chang-zhen１
（１．China North Engine Research Institute, Datong ０３７０３６, China；２． School of Material Science and Engineering,Tianjin University，Tianjin ３０００７２, China）
Abstract：By taking the offshore gas and oil pipeline running between Lüshun and Dalian as an example, a critical engineering assessment was made to study the fracture and fatigue properties of pipeline during its installation based on British standard BS７９１０．The fracture critical dimensions and fatigue life of flaw in welded joints were determined under the conditions of different depths of water，various flaw types，different locations and misalignments．The study lays a foundation for judging the acceptability of flaws．
Key words：British standard ７９１０；pipeline steel；critical engineering assessment；fatigue life
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