Hebei ChongSheng Special Steel Pipe Co.,Ltd.
The raw material of the seamless steel pipe is circular tube, round tube embryo to be cut through the cutting machine into a length of about 1 meter of the blank, and sent to the furnace by the conveyor belt heating. The billet is fed into the furnace for heating at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. Round tube baked after the pressure through the punching machine to wear empty. Generally more common punching machine is a cone-shaped roller punching machine, this perforation machine production efficiency, product quality, perforation expansion diameter, can wear a variety of steel. After perforation, round tube billet has been three roll inclined rolling, rolling or extrusion. After the extrusion to be detached. Sizing machine through the cone-shaped high-speed rotation into the steel embryo perforation, the formation of steel pipe. The inner diameter of the pipe is determined by the length of the outer diameter of the drill bit. After passing through the steel pipe, into the cooling tower, through the water cooling, steel pipe after cooling, it is necessary to straighten. After the steel pipe straightened by the conveyor belt sent to the metal testing machine (or water pressure test) for internal testing. If the steel pipe cracks, bubbles and other issues, will be detected. After the steel pipe quality inspection through rigorous manual selection. After the steel pipe quality inspection, with paint spray on the number, specifications, production batch number. And by the crane hanging into the warehouse.
Seamless steel pipe is made of steel ingot or solid tube through the perforated tube, and then made by hot rolling, cold or cold. Seamless steel pipe in China's steel industry has an important position. According to incomplete statistics, China's existing seamless steel pipe production enterprises more than 240, more than 250 sets of seamless steel pipe units, with an annual output capacity of about 450 million tons. From the caliber, <φ76, accounting for 35%, <φ159-650, accounting for 25%. From the species, the general use of pipe 1.9 million tons, accounting for 54%; oil pipe 76 million tons, accounting for 5.7%; hydraulic pillars, precision tube 150,000 tons, accounting for 4.3%; stainless steel tube, Ton, accounting for 1.4%.
Hebei ChongSheng Special Steel Pipe Co.,Ltd.