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

Seamless Carbonsteel Pipe Iintroductions

Seamless carbonsteel pipe is made of steel ingot or solid billet through a perforated capillary, and then through hot rolling, cold rolling or cold rolling. Seamless carbon steel pipe plays an important role in China's steel pipe industry. According to incomplete statistics, China's existing seamless carbon steel pipe production enterprises about 240, seamless carbon 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%.

The raw material of seamless carbon steel pipe is round pipe billet, which is cut by cutting machine and sent to furnace for heating by conveyor belt. The billets are sent into a furnace to be heated to a temperature of about 1200 degrees Celsius. Fuel is hydrogen or acetylene. Temperature control in furnace is the key problem. After the round pipe billet comes out, it should go through the pressure perforator to perforate. Generally, the most common puncher is the conical roller puncher, which has high production efficiency, good product quality, large amount of perforation and enlargement, and can be used in many kinds of steel. After perforation, the round billet is rolled, rolled or extruded by three rollers. The tube must be de-sized after extrusion. The sizing machine rotates at high speed through the conical drill bit into the steel billet for drilling, forming a steel tube. The inner diameter of steel pipe is determined by the outer diameter length of the drill bit of the sizing machine. After sizing, the steel pipe enters the cooling tower and is cooled by water spraying. After cooling, the steel pipe is straightened. After straightening, the steel pipe is sent by conveyor belt to metal flaw detector (or hydraulic test) for internal flaw detection. If there are cracks or bubbles in the steel pipe, they will be detected. After the steel tube quality inspection also through the strict manual selection. After the steel pipe quality inspection, spray the serial number, specification and production batch number with paint. And by the crane into the warehouse.

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