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Briefly describe the process flow of cold drawn and honed pipes
Cold drawn (rolled) honed pipe: round tube blank→heating→piercing→annealing→pickling→oiling (copper plating)→multi-pass cold drawing (cold rolling)→ billet tube→heat treatment→straightening→hydraulic test (flaw detection)→marking→warehousing.
Hard rolled coils can be used as raw materials in hot-dip galvanizing plants because hot-dip galvanizing units are equipped with annealing lines. The weight of hard-rolled coils is generally 6 to 13.5 tons, and the inner diameter of the steel coil is 610mm.
Please indicate the source for reprinting:http://m.hkgz.cn
Please indicate the source for reprinting:http://m.hkgz.cn