manufacturing process

Straight seam submerged arc welded pipe is made of steel plate, while spiral welded pipe is made of hot rolled coil. The rolling process of hot strip steel unit has a series of advantages, and it has the metallurgical process ability to produce high-quality pipeline steel. For example, a water cooling system is installed on the output bench to accelerate cooling, which allows the use of low alloy components to achieve special strength levels and low temperature toughness, thereby improving the weldability of the steel. But this system is basically absent in steel plate production plants. The alloy content (carbon equivalent) of the coil is often lower than that of similar grades of steel, which also improves the weldability of spiral welded pipes.

product application

Anti-corrosion: Welded steel pipe refers to the steel strip or steel plate bending deformation into a round, square and other shapes after welding, the surface of the joint of the steel pipe. According to different welding methods, it can be divided into arc welding pipe, high frequency or low frequency resistance welding pipe, gas welding pipe, furnace welding pipe, Bondi pipe and so on. According to the shape of the weld can be divided into straight seam welded pipe and spiral welded pipe. Electric welded steel pipe is used in oil drilling and machinery, manufacturing and so on. The furnace welded pipe can be used as water and gas pipe, and the big mouth straight seam welded pipe can be used for high-pressure oil and gas transportation. Spiral welded pipe is used for oil and gas conveying, pipe pile, bridge pier, etc. Welded steel pipe has lower cost and higher production efficiency than seamless steel pipe.