Steel prices in Shijiazhuang Tel:
Classification of steel production methods
Shijiazhuang steel price manufacturing process can be divided into: hot rolled (extrusion), cold (pull), thermal expansion of these basic types of steel.
Shijiazhuang Steel prices in accordance with the manufacturing process can be divided into: straight seam welded steel pipes, submerged arc welding steel pipes, butt welding pipe coils, pipe thermal expansion pipe.
Shijiazhuang Steel prices and inferior method of identifying the pipe shoddy steel prone to collapse.
Folding is a variety of line pipe formed on the surface, this defect often throughout the product vertical. Have collapsed due to shoddy manufacturers to pursue high efficiency, reduction is too large, resulting in the ears, rolling to produce under a folded, folding the product after bending will crack down strength of steel.
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