China's long-lost small-diameter pipeline welding process has made new breakthroughs

Since the beginning of August, Qinghai Oilfield Engineering Construction Company has successfully used a “RMD+ thin” welding method for small-diameter pipelines with a diameter of 219 mm or less in the Jiaheguan, Jiuquan, Zhangye, Jinchang, and Wuwei cities. Wire semi-automatic down welding" process.

This is the first time in the construction of domestic long-distance pipelines and stations, marking a new breakthrough in the long-distance pipelines and oilfields in China.

The RMD+ filament semi-automatic down welding process is a process used in the welding process of small diameter pipelines.

It uses metal powder core wire and argon gas and carbon dioxide gas mixture root welding to ensure the alloy composition and strength of the weld zone, and then use the semi-automatic filament welding to fill the cover. The application of this process can reduce the welder's labor intensity, increase the welding speed, and ensure the welding quality.

In recent years, Qinghai Youjian Company has introduced and successfully applied semi-automatic STT, RMD, and fully automatic APW welding processes in domestic long-distance pipeline construction, and achieved good results.

In April of this year, the company won the bid for the first time in the long-distance pipeline EPC management model bidding and became the first builder in the domestic long-distance pipeline construction market to obtain this qualification through bidding. After obtaining the consent of the owner, China Petroleum Pipeline Construction Project Management Department, for the first time, the RMD+ filament semi-automatic down welding new process was successfully applied to the welding of long-distance pipeline construction in domestic small-diameter pipelines, with a pass rate of 98%. the above.