中俄东线OD 1422 mm埋地管道的断裂控制设计

发布时间：2018-06-04 16:32

本文选题：中俄东线 + OD　；参考：《油气储运》2017年09期

【摘要】：中俄东线天然气管道是中国首条大口径OD 1 422 mm输气管道,途经东北严寒地区,钢级为X80、设计压力为12 MPa,其断裂控制设计是难点。结合断裂失效模式,明确了该工程断裂失效的控制原则。根据中俄东线管输天然气组份、管道壁厚、流变应力、运行温度及管沟回填等参数,采用断裂力学理论及相关模型计算了钢管焊缝和热影响区的起裂韧性、钢管管体止裂韧性以及环焊缝的起裂韧性,制定了中俄管道的钢管和环焊缝韧性指标。对比工程推荐采用的指标,该断裂韧性推荐指标在符合计算需求量的基础上,均有一定的裕量,能够满足管道的断裂控制要求。同时为了确保管道吊装下沟时环焊缝安全,对管道的韧脆转变温度和下沟温度下限值提出了建议。
[Abstract]:The natural gas pipeline of the East Line between China and Russia is the first large-caliber OD 1,422 mm gas pipeline in China, which passes through the cold area in northeast China. The steel grade is X80 and the design pressure is 12 MPA. The fracture control design is difficult. Combined with fracture failure mode, the control principle of fracture failure of this project is clarified. Based on the parameters of natural gas components, wall thickness, rheological stress, operating temperature and backfill of pipe trenches, the fracture mechanics theory and relevant models are used to calculate the initiation toughness of steel pipe welds and heat-affected zones. The anti-crack toughness of steel pipe and the initiation toughness of girth weld are studied. The toughness index of steel pipe and girth weld in Sino-Russian pipeline is established. Compared with the index recommended in engineering, the recommended index of fracture toughness has a certain margin on the basis of meeting the calculated demand, which can meet the requirements of pipeline fracture control. At the same time, in order to ensure the safety of the girth weld when the pipe is hoisted under the trench, some suggestions are put forward for the ductile and brittle transition temperature and the lower limit value of the lower ditch temperature.
【作者单位】：中国石油管道局工程有限公司;
【基金】：中国石油天然气股份公司“十二·五”重大科技专项“第三代大输量天然气管道关键技术研究”,2012E-2801-01
【分类号】：TE973.1

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