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。
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。
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。
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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