As the welding structure of bellow expansion joints used in GIS/GIL transmission and transformation pipelines is a docking joint,it is very difficult to completely weld the annular seams between the bellows and its connection.From the consideration of force analysis and calculation as well as engineering practice and application,it is unnecessary to require full penetration.The welding structure of the end pipe and the flange is to be designed into corner welding,of which the weld strength meets the relevant requirements.Due to the structural characteristics of bellows and its better application environment,moderate incomplete penetration does not affect the safe use of bellow expansion joints in GIS/GIL transmission and transformation pipelines.
关键词
波纹管/膨胀节/未焊透/风险分析
Key words
bellows/expansion joint/incomplete penetration of weld/risk analysis
维普
万方数据