Cangzhou Steel Pipe Group (CSPG) Co., Ltd.

Small Diameter Cold-Drawn Seamless Steel Pipe

According to the different materials, small diameter cold-drawn seamless steel pipe is divided into ordinary carbon structure pipe, low alloy structure pipe, high quality carbon structure pipe, alloy structure pipe, stainless pipe and so on.

According to the different materials, small diameter cold-drawn seamless steel pipe is divided into ordinary carbon structure pipe, low alloy structure pipe, high quality carbon structure pipe, alloy structure pipe, stainless pipe and so on. The main packing methods of small diameter cold drawn seamless steel tube are bundling, packing, oil bundling and oil packing. Production process of small diameter cold-drawn seamless steel tube: round tube blank heating perforation punching annealing pickling oil coating (copper plating) multiple cold-drawn (cold rolling) blank tube heat treatment straightening water pressure test (flaw detection) marking warehousing. In addition to the chemical composition and mechanical properties to do water pressure test, flanging, flaring, flattening and other tests. The main materials are size 10, 20, 35, etc.

The steel tubes with the ratio of outer diameter to wall thickness greater than 20 are called thin-walled steel tubes. Thin-walled steel tubes are cold-drawn. Carbon steel, low alloy steel, alloy steel thin-walled pipe is suitable for general structure, mechanical structure parts; Thin wall fluid steel tube is used for conveying general fluid. Stainless steel thin-wall pipe is used in chemical industry, petroleum, light industry, food, mechanical instruments and other industrial heat-resistant containers, conveying pipes and mechanical structural parts.

According to incomplete statistics, China's existing seamless pipe production enterprises about 240, seamless steel pipe unit about 250 sets, with an annual capacity of about 4.5 million tons. From the caliber, < phi 76, 35%, < phi 159-650, 25%. From the variety, the general purpose tube 1.9 million tons, accounting for 54%; Petroleum pipeline 760,000 tons, accounting for 5.7%; Hydraulic prop, precision pipe 150,000 tons, accounting for 4.3%; Stainless steel pipes, bearing pipes and automobile pipes totaled 50,000 tons, accounting for 1.4%.

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