What’s spiral welded steel pipe?
Spiral welded steel pipe is made with the steel strip or steel plate bending deformation shapes like round, square etc. before welding, jointed on the surface of the steel pipe. There are different welding ways: electric arc welding, high frequency or low frequency electric resistance welding, gas welding, butt weld etc. According to the weld shape, welded pipe can be divided into straight seam welded pipe and spiral welded pipe. Electric welded steel pipe is used in oil drilling and machinery manufacturing etc. Butt welded pipe is mainly used as water gas pipe etc. Large diameter straight seam welded pipe is applied in high pressure oil and gas transmission; Spiral welding pipe is mainly applied in oil and gas transportation, pipe pile and pier. Welded steel pipe is lower cost and higher production efficiency than seamless steel tube.
Spiral welding pipe has simple production technology, high production efficiency, low cost and rapid development. The strength of spiral welded steel pipe is usually higher than straight seam welded pipe. But compared with straight seam pipe with the same length, the weld seam will increase 30%-100% and the production speed is low. So a small diameter welded pipe adopts straight seam welding, large diameter welded pipe mostly uses spiral welding.
The common material: Q235A，Q23b,0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Q345, L245, L290, X42, X46, X70, X80 etc. As a professional spiral welded pipe manufacturers, Anson Steel provides high quality spiral welded pipe for our customers and purchaser. Welcome to send inquiry to us! Email: email@example.com
Specifications: Generally specifications include standard brand, nominal diameter, nominal weight of the steel bar (quality), the specified length and the index of the tolerance values etc. And the rebar exported from China scale range is 6～12m.
1. Surface quality: The end should be cut flat straight, surface don’t has crack, scarring and folding and without use harmful defects etc.
2. Dimension deviation value
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