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In late January, west-east gas transmission pipeline company according to the former repair experience, promotion and kind of natural gas pipeline of commonly used to repair methods, and to develop the anticorrosion, nitrogen replacement when repairs and TaoXiu size some general principles, not only as the company's repair guidance law, and for other large diameter, high pressure long natural gas pipeline emergency repair work provides reference.
Staff in jiangnan water channel rescue drill site.
For long for natural gas pipeline, incident is unfavorable the safe operation, emergency rescue in time or not is very important.
The company regulation, four cases appear to immediately start emergency response system, the implementation of the pipe repair. The four cases, pipe perforation, and fracture caused drilling gas leak, fire and explosion; Station, the room of the pipeline rupture, perforation and equipment failure of natural gas produced leakage, fire and explosion, can not online processing, lead to interrupt the main operation; Pipeline safety range and pipeline are greater than serious deformation could cause broken tube situation; The pig card plugging, pipe ice blocking, can not online processing, cause gas supply interruption.
According to the west-east gas transmission pipeline risk point and the domestic and foreign pipe repair experience, west-east gas transmission pipeline company in view of the different event type summarizes the 13 repair methods. Each method, the specific provisions of the number of special material to repair, machine and estimate time. For example, meet in the pipeline of weld defect or pipe to ring in less than 10 mm in diameter hole leakage, need to give priority to the TaoXiu welding method. This method has been in ZaoYang repair in the construction such as application. Practice has proved, in this way can shorten 10 hours to repair time, and has great significance for popularization.
Repair it pointed out that, if pipe appear larger deformation, broken tube, spiral welding crack, more than 100 mm in diameter of holes or more than coupling length, need to change in time of emergency rescue in the pipe. This is one of the most widely applied a repair methods. West-east gas transmission pipeline company the vent, detailed regulations and displacement into operation, dig homework pit, cutting, put isolation ball, detection peace pressure of the working standard procedures, let d emergency repair personnel in daily drill and practice according to the operation can depend on.
At present, west-east gas transmission pipeline company operation total length of pipe has more than 10000 kilometers. By 2015, the company operating pipeline is expected to close to 20000 kilometers presidents. 13 repair methods for natural gas pipeline safety guarantee stable operation, to achieve the effective control, properly handle, reduce loss, repair and rebuild damaged facilities as soon as possible the purpose to lay the foundation.