Steel is not only for the transmission fluid and powdered solids, heat exchange, manufacture of mechanical parts and containers, it is an economical steel. Building structure with a steel pipe manufacturing grid, pillars and mechanical support, can reduce weight and save 20 to 40% metal, and can achieve mechanized construction factory.

Steel pipe producting process
Billet – Billet pickling – billet feed off – piercing – piercing – steel ball handling – burst water pipe – steel peeling – steel drill – steel pickling – steel phosphating – Steel saponification – cold drawn steel – steel cold drawn – Heading steel – steel finished straightening – steel cutting head cut tail – steel finished checking – into the finished pipe.

Solid tube inspection and removal of surface defects cut into desired length, end to end in the perforated tube surface-centering, and then sent to the furnace heating, punch a hole in the hole while continuing to rotate and move forward, and the head of the roll under the effect of gradually formed within the tube cavity, said capillary tube, and then sent to the automatic rolling machine to rolling last by both machine are whole wall, the sizing mill sizing, to specifications, the use of continuous pipe mill production of hot rolled seamless steel pipe is a more advanced method of putting up get smaller and better-quality seamless, must be cold drawn or a combination of methods is usually rolled on a two-roll mill, pipe in variable section hole slots and tapered head does not move the circular hole formed in rolling, drawing usually in a single chain or double chain drawing machine, extrusion method is about good tube placed in closed heating the extruded rod and the cylinder hole together with the extruded rod movement, the pressing member from the smaller hole in the extrusion die, this method can produce a smaller diameter pipe.