Tuesday, January 4, 2022

Comparison for spiral steel pipe and seamless steel pipe

Seamless steel pipe is a kind of hollow section, and the peripheral no joint of strip steel. Seamless steel pipeis no seam, hot or cold drawing process molding. Characteristic is confined good.

Comparison for spiral steel pipe and seamless steel pipe

Spiral steel pipe features: straight seam welding pipe production process is simple, high production efficiency, low cost. the strength of the spiral welded pipe is usually better than straight seam welding pipe is high, which can use a narrow billet production of larger diameter welded pipe, still can use the same width of the billet production pipe diameter different welded pipe. 

But with the same length straight seam pipe, compared to weld length increases 30 ~ 100%, and the production speed is low. Therefore, a small-bore pipe welding mostly adopts the straight seam welding, large diameter welded pipe is mostly using spiral welded.

Spiral steel pipe‘s type is made by strip, seamless steel pipe type is made by round steel, difference is very big, production process different: 

Spiral steel pipe is to use strip steel welding, can see the weld; 

Seamless steel pipe is made with round steel punched, Spiral steel pipe wall thickness difference under very big, and Seamless steel pipe small pipe under basic no difference, the difference for bassoon and will not many.

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