In the production process of SSAW steel pipe, a series of matters need to be paid attention to. In addition to the following test items, according to API standards and other relevant standards as well as the special requirements of some users, destructive tests of steel pipes and steel pipes are also needed, including incorporating physical and chemical properties of raw materials into factory sampling and visual inspection of 100% steel.


A. Oil marking: steel after oil treatment, to prevent corrosion, and according to user requirements for marking.
B. Horizontal milling: The flat steel anvil is crimped, and then double-sided steel milling is carried out through the milling machine to meet the requirements of plate width, parallelism and groove shape.
C. Shearing Forming: The steel plate production line is rolled into the tube along the outer edge of the spiral curl.
D. butt cutting: double-sided submerged arc welding adopts advanced technology for pre-welding, internal welding and external welding. Welded steel pipe adopts plasma cutting specification length.