Hot rolled seamless steel tubes:
Round tube → heating → perforation → three skew rolling, rolling or extrusion → detached → sizing (or reducing) → cooling → straightening → hydrostatic test (or testing) → marker → storage. raw material of seamless pipe is a round tube that embryos to go through a cutting machine to cut and sent by conveyor belt furnace heating. Billet is fed into the heating furnace with temperature of 1200 degrees.
The furnace temperature control is critical to wear air round tube.generally, common puncher is tapered roller punch with high production efficiency, product quality, perforated expanding volume, wearing a variety of steels. After perforation, round tube has been three-roll cross rolling, rolling or extrusion.
After extrusion off pipe sizing. Sizing mill by the high-speed rotation of the cone drill into the Billet punch to form a steel pipe. The steel pipe inner diameter is determined by the length of the outer diameter of the sizing mill drill. After sizing, the steel pipe to enter the cooling tower by the water spray cooling, it is necessary to be straightening after cooling. In the interior of the steel pipe there is such as cracks, bubbles detected. Steel pipe quality inspection is through a rigorous manual selection. Steel pipe use spray paint on the number, size, production batch after Quality Supervision, Inspection by a cable car hanging into the warehouse.
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