With the establishment of the national pipeline network, the construction of the main pipeline network of the motherland ushered in the construction peak period. The northern and middle sections of the Sino-Russian Eastern Route were put into production one after another.
The middle section of the section, the interconnection of the Jiangsu Binhai LNG export pipeline and related trunk lines, the Zhangjiakou-Anping connection line, the first phase of the Mengxi coal-to-gas export pipeline project, the Zhangzhou LNG export pipeline in Fujian, and the Guangdong pipeline network construction have started one after another. Due to the successful application of the northern section of the Sino- Russian Eastern Route, the fully automatic pipeline welding method has been widely used in pipeline construction. However, in the construction of special terrain, such as: water network, mountainous terrain, the flow operation of the fully automatic large unit is restricted, and the bending and climbing ability of the internal welding machine restricts the application of the fully automatic welding unit, so combined automatic welding. The gas shielded flux-core semi-automatic welding method has emerged at the historic moment. So will the fiber-semi-welding process that used to be familiar to welders, strong in wind resistance, fast in work efficiency, and less investment in equipment to die?
LONGTERM has been involved in the R&D and manufacturing of pipeline welding equipment since 1999. With the advancement of pipeline welding technology, pipeline welding equipment is also constantly changing, from the early argon electric welding to the first-line application of cellulose in Shanxi and Beijing in the early 1990s. Welding to fiber and semi-process, to STT, RMD bottoming, semi-automatic self-protection and capping process, and to today’s fully automatic and combined automatic welding process, this way, LONGTERM stepped on the beat of the times and kept up with the pace fumblingly. Nowadays, a variety of welding methods coexist, and fiber half is still used. However, due to the large dispersion of the low temperature impact value of the self-shielded welding wire itself in high-strength steel welds, the performance of some pipeline welds has been unstable in recent years. The pipeline maintenance cost is relatively high.
How to effectively improve the quality of pipeline construction? For this reason, it has become inevitable to popularize solid wire gas shielded automatic welding on a large scale, but at present this process cannot solve the welding problem of all terrains. Based on the existence of the above objective factors, it came into being to adopt manual argon arc welding root welding + gas shielded flux-cored wire semi-automatic filling process in complex terrain (such as mountainous areas and water networks), supplemented by data acquisition and monitoring system, which effectively overcomes The deficiencies of the fiber and half technology have been promoted and applied in the past one or two years.
In order to adapt to this change, LONGTERM provides solutions to customers and friends, launches a new generation of fully digital product D7-500A welding machine, and compares the investment of the new and old generations of products, and a single unit can save more than 10,000 yuan in investment costs.
