Application of ERW steel pipe in petrochemical industry
In recent years, there has been a trend in the world to replace high-cost seamless steel pipes with high-quality welded pipes. This is mainly due to the continuous breakthrough in the production technology of welded pipes, which is reflected in the following aspects:
(1) Advances in desulfurization technology have reduced the sulfur content of steel and improved the welding quality of steel pipes.
(2) Due to the addition of special elements such as V, Ti, and Nb, the carbon equivalent is lowered, and the toughness and strength of the steel pipe are improved.
(3) The application of vacuum degassing technology improves the purity of the tube blank strip, reduces inclusions, and improves the quality of the weld.
(4) The development of hot rolling technology has improved the dimensional accuracy of the strip and thus reduced the dimensional deviation of the welded pipe.
(5) Improvement of quality inspection methods, such as ultrasonic non-destructive testing, hydraulic testing machines and other equipment, to ensure the quality of the final product.
Some technical performances of erw steel pipe are better than seamless steel pipes, but the price is much lower than that of seamless steel pipes, but it has not been widely used in the petrochemical industry. The main reasons are:
(1) The traditional concept that has been formed for a long time. When selecting materials, designers mainly consider whether the material is reliable and rarely consider the cost of materials. Therefore, it is not possible to boldly use erw steel pipes.
(2) The investment system of petrochemical enterprise construction projects restricts the initiative to select erw steel pipes and reduce costs. Investors mainly consider the project's project establishment, funding sources, construction progress and other factors, and less demand for designers to reduce material costs.
(3) China's straight seam electric resistance welded steel pipe developed late, and it is not yet possible to produce large diameter straight seam welded pipe larger than 508mm, thus objectively restricting the wide use of erw steel pipe.
http://www.xysteelpipe.com/info/Application-of-ERW-steel-pipe-in-petrochemical-industry-1226-1.htm
(1) Advances in desulfurization technology have reduced the sulfur content of steel and improved the welding quality of steel pipes.
(2) Due to the addition of special elements such as V, Ti, and Nb, the carbon equivalent is lowered, and the toughness and strength of the steel pipe are improved.
(3) The application of vacuum degassing technology improves the purity of the tube blank strip, reduces inclusions, and improves the quality of the weld.
(4) The development of hot rolling technology has improved the dimensional accuracy of the strip and thus reduced the dimensional deviation of the welded pipe.
(5) Improvement of quality inspection methods, such as ultrasonic non-destructive testing, hydraulic testing machines and other equipment, to ensure the quality of the final product.
Some technical performances of erw steel pipe are better than seamless steel pipes, but the price is much lower than that of seamless steel pipes, but it has not been widely used in the petrochemical industry. The main reasons are:
(1) The traditional concept that has been formed for a long time. When selecting materials, designers mainly consider whether the material is reliable and rarely consider the cost of materials. Therefore, it is not possible to boldly use erw steel pipes.
(2) The investment system of petrochemical enterprise construction projects restricts the initiative to select erw steel pipes and reduce costs. Investors mainly consider the project's project establishment, funding sources, construction progress and other factors, and less demand for designers to reduce material costs.
(3) China's straight seam electric resistance welded steel pipe developed late, and it is not yet possible to produce large diameter straight seam welded pipe larger than 508mm, thus objectively restricting the wide use of erw steel pipe.
http://www.xysteelpipe.com/info/Application-of-ERW-steel-pipe-in-petrochemical-industry-1226-1.htm
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