自带旁通油气管道检修新技术油气管道常因腐蚀损坏、设备改扩建、流程改造、更换管段或意外事故等需要在管道开孔，以便连接管件。过去这类工程只能停产、泄压、吹扫，使管道达到安全要求，才能动火开孔连头。这样生产周期长，耗资大，影响生产，安全性差。目前，国内外的... Own by-pass oil and gas pipeline maintenance of new technologies often due to corrosion of oil and gas pipelines, equipment expansion, process modification, replacement of pipe sections or accidents need to open holes in the pipe in order to connect the pipe. In the past such projects can only be discontinued, pressure relief, purging, so that the pipeline to meet the safety requirements in order to move the fire hole together. This long production cycle, costly, affecting production, poor security. At present, at home and abroad ...