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在管道施工或抢修过程中经常会遇到动火连头作业,为了在有限的时间里保质保量完成作业,结合以往的动火连头经验,开展了一刀切连接法研究。此方法已在中沧线和冀宁线等多处管道的动火作业中应用,效果显著,为抢修工作赢得了宝贵时间。1传统作业方法传统动火连头作业程序为先将弯头焊接在割断的旧管线上,然后再焊接弯头和新管线之间的短节。在管径大、弯头曲率半径大时,很难准确计算弯头的结构长度,而且在用吊车配合组对时
In the pipeline construction or repair process often encounter moving jobs, in order to achieve the quality and quantity in a limited time to complete the operation, combined with the previous experience of moving together, carried out a one-size-fits-all connection method. This method has been applied to hot work in many pipelines, such as Zhongcang Line and Ji-Ning Line. The method has achieved remarkable results and has won valuable time for repair work. 1 The traditional method of operation The traditional method of operation is to weld the elbow to the cut old pipeline and then weld the short section between the elbow and the new pipeline. In the pipe diameter, bend radius of curvature is large, it is difficult to accurately calculate the elbow length of the structure, but also with the crane with the group