What is submerged arc welded steel pipe
Submerged arc welded steel pipe is a kind of spiral welded steel pipe, which is made of strip steel coil as raw material, extruded at room temperature and welded by automatic double-wire double-sided submerged arc welding process. This kind of steel pipe has the advantages of simple production process, high production efficiency and low cost, and has obvious development advantages. The materials of submerged arc welded steel pipes include Q235A, Q235B, Q345, L245, L290, X42, X46, X70, X80, etc. In the production process, raw materials such as strip steel coils, welding wires and fluxes have to undergo strict physical and chemical inspection. Single wire or double wire submerged arc welding is used for butt joint of strip steel head and tail, and automatic submerged arc welding is used for repair welding after being rolled into steel pipe. Submerged arc welded steel pipes are widely used in fluid transportation, metal structure, pile foundation and other fields. The products are not only suitable for tap water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction, but also one of the 20 key products developed in China. In addition, the weld quality of submerged arc welded steel pipe is high, the protective effect of slag against air is good, the welding parameters can be kept stable through automatic adjustment, the technical level of welders is not high, the weld composition is stable and the mechanical properties are good. These characteristics make submerged arc welded steel pipe widely used in industrial field. The production technology of submerged arc welding steel pipe is developing continuously, which has high automation, high welding speed and high output, and can weld steel pipes up to 30 meters per hour. These technical advantages and wide application fields make submerged arc welded steel pipe an indispensable and important material in modern industry.
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