Carbon steel pipe can be divided into seamless steel pipe, straight steel pipe, spiral steel pipe, high frequency welded steel pipe and so on. The raw material for rolling seamless carbon steel pipe is round tube billet. Cold Drawn ASTM A103 13 Inch Thin Wall Seamless Carbon Steel Pipe embryo is cut by a cutting machine to produce billet with a growth of about 1 metre, which is heated by conveyor belt in the furnace. The billet is fed into the furnace and heated at about 1200 degrees Celsius. Fuel is hydrogen or acetylene. Temperature control in furnace is a key problem. After discharging the round billet, it must pass through the pressure perforator. The common piercing machine is conical roll piercing machine.
This kind of piercing machine has high production efficiency, good product quality, large piercing diameter enlargement, and can pierce many kinds of steel. After piercing, the round billet is rolled, rolled or extruded by three rolls. After extrusion, the pipe should be taken off and calibrated. The sizing machine rotates into the steel embryo to drill holes at high speed through the conical drill bit to form the carbon steel pipe. The inner diameter of carbon steel pipe is determined by the length of the outer diameter of the drill bit of the sizing machine. After sizing, the carbon steel pipe enters the cooling tower and is cooled by spraying water. After cooling, the carbon steel pipe will be straightened.
After straightening, the carbon steel pipe is sent to the metal flaw detector by conveyor belt for internal flaw detection. If there are cracks and bubbles in the carbon steel pipe, they will be detected. After the quality inspection of carbon steel pipes, strict manual selection is required. After quality inspection of carbon steel pipes, paint is sprayed with numbers, specifications, production batches, etc. The crane is hoisted into the warehouse.
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