Straight seam resistance welded steel pipe L360 steel pipe reinforced grade 3PE anti-corrosion steel pipe straight seam steel pipe manufacturer

Description :

　　At the operating temperature of -5 ℃, the Charpy impact absorption energy of straight seam resistance welded steel pipes is ≥ 145J. The technical conditions for pipeline steel generally adopt the American Petroleum Institute standard APISpec5L, but the ordering technical conditions for specific projects or users in China are often much stricter than API standards. The smelting process technology has strict requirements, and the technical difficulties mainly focus on: 1) controlling the content of impurity elements; 2) Inclusion control; 3) Narrow component control. There are three main processes for producing welded steel pipes: resistance welding (ERW), Wenxian X80 straight seam resistance welding, spiral submerged arc welding (SSAW), and straight seam submerged arc welding (LSAW). The welded pipes produced by these three processes have different positioning in their application fields due to differences in raw materials, forming processes, caliber sizes, and quality. (a) Straight seam resistance welded pipes (ERW resistance welded pipes are a steel pipe variety that was produced early, widely used, with more than 2000 production units and a production volume (accounting for about 80% of the total welded pipe production capacity) in China. The product specifications range from 20 to 610mm, and they have played an important role in the national economic construction.

　　Since the 1980s, more than 30 sets of ERW219-610mm units have been introduced with advanced technology from abroad. After years of production practice, the level of equipment technology has made significant progress. It is recommended to melt the zinc layer as much as possible and vaporize and evaporate it to escape from the weld seam, which can greatly reduce the amount of liquid zinc left in the weld seam. L245N pipeline is the lifeline for maintaining the operation of oil wells. Due to different geological conditions. The combined effects of tensile, compressive, bending, and torsional stresses act on the pipe body, resulting in a complex underground stress state. This places high demands on the quality of the casing itself. Once the casing itself is damaged for some reason, it may lead to a reduction in production or even scrapping of the entire well. The welding characteristics of galvanized steel: Galvanized steel is generally low carbon steel coated with a layer of zinc, and the galvanized layer is generally 20um thick. The product quality is constantly improving due to its low investment, fast results, and wide application range, leading to rapid development. 6. Ensure the stability and reliability of product quality. Pipeline pipe: It is used to transport oil, gas, or water extracted from the ground to oil and gas industry enterprises through pipeline pipes.

　　With the development of CSP production technology for sheet metal, low-cost and reliable raw materials have been provided, creating favorable conditions for its further development in the future. This part of the product has developed from the fields of fluid transportation and structure to seamless pipe applications such as oil well pipes and pipeline pipes. Its typical production process should be: plate and strip raw materials → raw material pretreatment → cold bending forming → welding → weld heat treatment → weld (pipe body) inspection → finishing → finished welded pipe (b) spiral submerged arc welded pipe (SSAW). The equipment investment for spiral submerged arc welded pipe (SSAW) is relatively small, as it uses low-priced narrow strip (plate) coil continuous welding to produce large-diameter (? 1016-3200mm) welded pipes. The production process is simple, the operating cost is low, and it has the advantage of low-cost operation. The spiral welded pipe for oil and gas transportation in China has formed a basic format dominated by steel pipe factories under the petroleum system. The spiral welded pipe, which adopts advanced technologies such as low residual stress forming and mechanical expansion of pipe ends, and has undergone strict quality control, can be comparable in quality to straight seam welded pipe. It has been widely used in oil and gas long-distance pipeline projects such as the West East Gas Pipeline in China and is the main pipe type used in China's oil and gas long-distance pipeline projects. Its production capacity is already able to meet the needs of China's long-distance oil and gas pipeline construction, and has exported a large number of (c) LSAW (Longitudinal Submerged Arc Welding) pipes. LSAW (Longitudinal Submerged Arc Welding) is an advanced pipe manufacturing technology that developed relatively late in China and was mainly manufactured using UOE technology in the past. In recent years, progressive JCOE has gradually become another new mainstream technology in China and around the world. The straight seam submerged arc welded pipe has reliable quality and is widely used on the main lines of high-pressure oil and gas transportation.

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