In service pipeline non-stop transmission welding is a method to maintenance and rebuild pipeline under welding pipe of certain transmission amount, flow speed, pressure status.

在役管道不停输焊接是在一定的输量、流速、压力的状态下焊接管件，对管道进行维修、改造的一种方法。

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Welding repair onto in-service pressure pipelines has good economic efficiency and application trend, because it is much quick and has little effect to normal run of pipeline.

压力管道在役焊接修复时间短，速度快，对管道正常运行影响小，有巨大的经济效益和广阔的应用前景。

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The present invention has simple structure, high sealing performance, high reliability and long service life, and is used in pipeline for conveying high and low pressure medium.

本发明结构简单，密封性能好，安全可靠，使用寿命长，是安装在管路上用于输送各种高低压介质的比较理想的闸阀。

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