Common standard for helical steel pipe now is SY5040-83. Piling pipe with spir...
Surface Treatment of SAWH Steel Pipe : 1, clean Used solvent, emulsion clean...
Spiral welded pipe into the steel unit, multi-channel roll rolling strip gradually r...
Automatic submerged arc welding was invented in 1940, a new kind of welded pipe metho...
Piling pipe is also known as pipe, welded steel pipe made of steel sheet or strip after ...
Large-diameter welded pipe is the pipe welds, raw materials are mainly steel ...
The American Petroleum Institute specification API 5L steel pipe covers seamles...
(1) the superior quality of billet High frequency welded pipe steel billet an...
Under the welded pipe from the top of the arc, from top to bottom all-position ...
Welded steel pipe is made of steel belt or steel plate and bended into deformation s...
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