Seamless steel pipe production method:
1. Hot-rolled seamless steel pipe
Hot - rolled seamless tube is generally produced in the automatic tube rolling set.After inspection and removal of surface defects, the solid tube billet is cut into the required length, then the core is settled on the perforating end of the tube billet, and then it is sent to the heating furnace for heating and perforating on the perforator.In the perforation at the same time continuously rotating and forward, in the role of the roller and the head, the tube blank internal cavity gradually formed, called capillary.And then send it to the automatic tube rolling machine for inheritance rolling.At last, the whole machine has the same wall thickness, and the diameter is determined by the sizing machine to meet the specification requirements.It is a better method to produce hot - rolled seamless steel tube by continuous rolling mill.
2. Cold rolling and cold drawing
To obtain seamless tubes of smaller size and better quality, cold rolling, cold drawing, or a combination of the two
3. The extrusion method
By extrusion, the heated billet is placed in a closed extrusion cylinder, and the perforated rod moves with the extrusio
Specification and application of seamless steel tube:
The carbon steel seamless pipe has a hollow section and can be used as a conduit for conveying fluids, such as oil, natural gas, gas, water, and some solid materials.Compared with solid steel such as round steel, seamless steel tube has the same bending and torsional strength and lighter weight. It is a kind of economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction.Ring parts made of seamless steel tube can improve material utilization, simplify manufacturing process, and save materials and processing time.Steel pipe or a variety of conventional weapons indispensable materials, gun barrel, gun barrel to steel pipe to manufacture.
1. Seamless steel tube for structure (GB/ t8162-2008) is the seamless steel tube for general structure and mechanical structure.
2. Seamless Steel Pipe (GB/ t8163-2008) is the oil line seamless steel pipe used for conveying water, Oil, gas and other fluids.
3. Seamless steel tube for low and medium pressure boiler (gb3087-1999) is used for manufacturing various structures of low and medium pressure boiler overheating
Steel tube can be divided into round tube and shaped tube according to the shape of cross section area. Since the area of the circle is the largest when the circumference is the same, more fluid can be transferred with the circular tube.In addition, when the ring section is under internal or external radial pressure, the force is relatively uniform, therefore, the vast majority of steel tubes are circular tubes. But, circular tube also has certain limitation, if be subjected to the condition of plane bending, circular tube is inferior to square, rectangle tube bending strength is big, a few agricultural machinery have skeleton, steel wood furniture to be used commonly square, rectangle tube.Special shaped steel tubes with other cross section shapes are required for different purposes.
Seamless Steel Pipe