Cold drawn pipe is a kind of steel pipe when it is used. It is classified according to different production processes during operation, which is mainly different from hot rolled (expanded) pipe. In the process of expanding the diameter of the capillary tube or the raw material tube, it is made by multiple cold drawing processes, usually on a single-chain or double-chain cold drawing machine of 0.5 to 100T. Cold rolled (dial) steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, machined pipes, thick-walled pipes, small diameter and internal mold cold drawn pipes and other steel pipes , Also includes carbon thin-walled steel pipes, alloy thin-walled steel pipes, stainless steel thin-walled steel pipes, special-shaped steel pipes.
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