The raw material for rolling the seamless pipe is a round tube blank, which is cut into a blank having a length of about 1 m by a cutting machine, and sent to a furnace for heating via a conveyor belt. The billet is fed into a furnace and heated to a temperature of approximately 1200 °C. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round billet is released, it is subjected to a through-hole punching machine. The more common perforating machine is a conical roller punching machine. This perforating machine has high production efficiency, good product quality, large diameter of perforation and can wear a variety of steel types. After perforation, the round billet is successively rolled, rolled or extruded by three rolls. After extrusion, the tube should be sizing. The sizing machine is rotated at a high speed by a conical drill bit into a steel core to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter of the sizing machine drill bit. After the steel pipe has been sized, it enters the cooling tower and is cooled by water spray. After the steel pipe is cooled, it is straightened. After the steel pipe is straightened, it is sent to a metal flaw detector (or water pressure test) by a conveyor belt for internal flaw detection. If there are cracks inside the steel pipe, bubbles and other problems will be detected. After the quality inspection of the steel pipe, it must be carefully selected by hand. After the quality inspection of the steel pipe, the paint is sprayed with the number, specification, production batch number, etc., and is hoisted into the warehouse by the crane.
1. Hot rolled seamless metal pipe
the usage of warm rolled metallic pipe billet to make heating and piercing, elongating, sizing and stranghtening, cooling, finally hollow bars finished, that is the type most usually used. Because it's far warm rolled, so value is lowest, however it is healthy for large quantity, for small quantity, need to make bloodless drawn or round bar piercing. length: outer diameter 32mm- 499mm, wall thickness 4mm- 80mm
2. Cold drawn seamless steel pipe
for outer diameter not over than 63.5mm, small size hole bar, while demanded quantity is underneath five tons, typically make bloodless drawn hole bar, the usage of large size warm rolled hole bar to attract to the scale demanded.some size can be finished best with the aid of one time drawing, however a few other sizes might need twice or three times to finish drawing, it takes time, so the fee is higher. bloodless drawn length outer diameter 16mm- 63.5mm
3. Hot- increasing seamless metallic pipe
For hollow bar sizes are special, no longer common sizes, have to use smaller thick wall hole bar to warm make bigger to be larger size hollow bar, however the technical belongings for warm-expanded hollow bar can be lower than the original hollow bar. Size: outer diameter over 356mm.
Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.
No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.
With the sense of responsibility, customer-centered, market-oriented, service-oriented, spot supply as the main body, good reputation, excellent business quality, integrity, conscientious work, perception of society and the spirit of Bianjin, we are committed to creating a win-win, easy and convenient large-scale integrated steel procurement for customers Platform.
The company upholds the enterprise tenet of integrity-based and customer-oriented, constantly strengthens internal management and builds an elite team, and will: all for users throughout the whole process of economic management, for this purpose, to provide customers with high-quality products and excellent services.