1. Different nature
A.
High-frequency welded steel pipe: After the hot-rolled coil is formed by the forming machine, the skin effect and proximity effect of high-frequency current are used to heat and melt the edge of the tube blank, and pressure welding is performed under the action of the extrusion roller to realize production. The product.
B.
Straight seam welded steel pipe: including double-sided
submerged arc welded straight seam welded steel pipe and high-frequency resistance welding, the English abbreviation of high-frequency resistance welding is erw, and the submerged arc welded straight seam steel pipe is divided into UOE, RBE according to its different forming methods, JCOE steel pipe, etc.
2. The material is different
A.
High-frequency welded steel pipe: The
high-frequency resistance welded steel pipe is different from the ordinary welded pipe welding process. The welding seam is formed by melting the base material of the steel strip body, and the mechanical strength is better than that of ordinary welded pipes.
B.
Straight seam welded steel pipe: The material of
straight seam welded steel pipe mainly includes pipeline steel series such as Q195, Q215, Q345, and x42.
Straight seam welded steel pipes are divided into two types: ordinary steel pipes and thickened steel pipes according to the specified wall thickness.
3. Different characteristics
A.
High-frequency welded steel pipe: smooth appearance, high precision, low cost, and small residual height of the weld, which is beneficial to the coating of 3PE anti-corrosion coating. The welding methods of
high-frequency welded steel pipes and submerged arc welded pipes are significantly different. Since the welding is completed instantaneously at high speed, it is much more difficult to ensure the welding quality than submerged arc welding.
B.
Straight seam welded steel pipe: The length of
straight seam welded steel pipe is mainly divided into fixed length and indeterminate length, which is mainly based on customer requirements, the length is generally 6-14 meters, and the large diameter
straight seam welded steel pipe may require two steel plates. Coiled this also forms a double weld.
