The first production treatment.

First, hot tie type seamless tube production and manufacturing is generally used in fully automatic tube rolling unit. Check and eliminate the solid core billet surface defects, cut to length requirements, secured on the end face of the billet cracking, and then sent to the heat treatment furnace to heat up the cutting machine to ensure that the cracking. With the continuous rotation of the broken hole at the forward, in the hot rolled strip and the role of the top edge, the billet inside the slow production of internal cavities, known as the burr pipe. The second cold rolling is carried out on the fully automatic tube rolling machine. Finally, the whole machine by the whole machine are wall thickness, sizing machine sizing, to meet the specifications of the model. The use of rotary tube rolling unit production of hot seamless pipe is a better production method.

If you need to get smaller specifications, better quality seamless tube, must choose cold rolling, cold drawing or both with the use of. Usually cold rolling process is carried out on two-roll extruder, and seamless steel pipe is cold rolled in a ring plate hole consisting of a circular hole groove with variable cross-section and an unmoved tapered top edge. Cold drawing operation is usually carried out on 0.5~100T peptide chain or double chain cold drawing machine.

The extrusion method involves placing a warm pipe billet into a sealed extrusion cylinder and performing a fitness motion with an extrusion bar to extrude the extruded part through a smaller die hole. This invention can produce seamless steel pipe with smaller diameter.

Second, the main use.

The main uses of the seamless pipe are very wide. The general-purpose seamless pipe is mainly cold rolled from ordinary carbon steel, low alloy tool steel or alloy tool steel, with the highest production capacity, and is mainly used as a pipeline for conveying liquids or constructing parts.

According to the different main uses, there are three kinds of supply: a, supply by composition and physical properties; b, supply by physical properties; c, supply by compression test. Seamless tubes supplied with grade a and b are also subjected to compression test when they are used to bear liquid pressure.

Specializing in the main use of seamless tubes are seamless tubes for heating furnace, seamless tubes for geological environment, seamless tubes for crude oil and many other.

Third, the type.

Seamless pipe can be categorized into various types according to the different manufacturing of hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe and so on.

According to the classification of appearance design there are ring-shaped tube, shaped tube and so on. In addition to rectangular square tubes and rectangular square tubes, there are stainless steel round tubes, semicircular tubes, triangular tubes, hexagonal tubes, convex tubes, red plum blossom tubes and so on.

According to different materials, there are ordinary carbon structural tubes, alloy structural steel structural tubes, high-quality carbon structural tubes, aluminum alloy structural tubes, stainless steel structural tubes and so on.

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