Raw materials: coil - leveling - end cutting and welding - forming - welding - removal of internal and external weld beads - pre-correction - induction heat treatment - sizing and straightening - eddy current testing - cutting - hydrostatic test - pickling - final inspection (strict quality control) - packaging - shipment. Features: Straight seam welded pipes have a simple production process, high production efficiency, low cost, and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. Narrower slabs can be used to produce welded pipes with larger diameters, and welded pipes with different diameters can be produced using slabs of the same width. However, compared with straight seam pipes of the same length, the weld length increases by 30~100%, and the production process is more complex.
Raw materials: coil - leveling - end cutting and welding - forming - welding - removal of internal and external weld beads - pre-correction - induction heat treatment - sizing and straightening - eddy current testing - cutting - hydrostatic test - pickling - final inspection (strict quality control) - packaging - shipment. Features: Straight seam welded pipes have a simple production process, high production efficiency, low cost, and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. Narrower slabs can be used to produce welded pipes with larger diameters, and welded pipes with different diameters can be produced using slabs of the same width. However, compared with straight seam pipes of the same length, the weld length increases by 30~100%, and the production process is more complex.
Hot-dip galvanized pipe is produced by reacting molten metal with an iron substrate to produce an alloy layer, thereby combining both the substrate and the coating. Hot-dip galvanizing first involves pickling the steel pipe to remove iron oxide from its surface. After pickling, the pipe is cleaned in a solution of ammonium chloride or zinc chloride, or a mixture of both, before being sent to a hot-dip galvanizing tank. Hot-dip galvanizing has advantages such as uniform coating, strong adhesion, and long service life. The steel pipe substrate and molten plating solution undergo a complex physical and chemical reaction to form a corrosion-resistant, tightly bonded zinc-iron alloy layer. The alloy layer, pure zinc layer, and steel pipe substrate are fused together, resulting in high corrosion resistance.
Tianjin Lida Steel Pipe Group Co., Ltd
Company address: Wangcun Industrial Park, Dasi Town, Xiqing District, Tianjin
Contact Phone:022-23977890
Lida Steel Pipe
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