Of hard work and tireless efforts of the researchers, a few days ago, independently developed by Baoji Petroleum Steel Pipe Co., Ltd. X100 steel grade spiral submerged arc Carbon Steel Welding Electrode, passed the production test, the performance indicators to meet the design standards. This indicates that China has been an effective solution to the problem of ultra-high strength pipeline steel production of medium-strong match. In recent years, with the long-distance high-pressure natural gas transmission pipeline construction increasing levels of X100 steel grade spiral submerged arc welded pipe is more and more people concern. Yield strength of 690 MPa or more, so this is known as the delivery of ultra-high strength steel pipe, not only the pipe forming the difficulty, but also for wire used in the production process must be deposited, stomatal resistance, and weldability Well, to ensure that the weld mechanical properties of strength and toughness of the indicator.
Baoji Steel Pipe Steel Pipe Institute researchers to carry forward the spirit of Iron Man, in the multi-party research on the basis of scientific and rational way to other strong match-based, high-speed Welding Wire research and development programs for the target, and by trial and error, groping, and finally the trial out of X100 steel grade spiral welded wire, and the timely development of a suitable diameter of 1219 mm, wall thickness 15.3 mm spiral submerged arc welded pipe production of high-speed welding process. By the production line of pre-production and rigorous testing, pipe weld forming a good, smooth surface, all the indicators in full compliance with API 5L (44) and the Second West standard requirements. Currently, the company has embarked on the mass production of the wire.