Supply Liaocheng cold drawn seamless pipe-seamless steel pipe factory

规格：

38*5

材质：

20# 45#

长度：

6-12m

Small-diameter cold-drawn seamless steel pipes and small-diameter thick-walled cold-drawn seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, etc. according to different production methods. Hot-rolled seamless pipes are generally produced in automatic pipe rolling. Produced on the unit. After inspection and removal of surface defects, the solid tube blank of small diameter seamless steel pipe is cut into the required length, centered on the perforated end face of the tube blank, and then sent to the heating furnace for heating. It is pierced on the piercing machine
It is continuously rotated and advanced while piercing. Under the action of the rollers and plugs, a cavity is gradually formed inside the tube blank, called a gross tube, and then sent to the automatic tube rolling machine for continued rolling. Finally, the wall thickness is evened by the leveling machine and the sizing machine is sized to meet the specification requirements. The continuous tube rolling unit is used to produce heat. Rolling seamless steel pipes is a more advanced method. If you want to obtain seamless pipes with smaller size and better quality, you must use cold rolling and cold drawing or a combination of the two methods. Cold rolling is usually carried out on a two-roll mill. The steel pipe is made into a variable cross-section circle. The extrusion method of rolling and cold drawing in an annular pass composed of a hole groove and a fixed conical head is usually performed on a single-chain or double-chain cold drawing machine. The heated tube blank is placed in a closed extrusion cylinder. The inner perforated rod moves together with the extrusion rod so that the extruded parts are extruded from the smaller die holes. This method can produce steel pipes with smaller diameters. Small diameter seamless steel pipe specification table
Specifications

Specifications

Specifications

Specifications

Specifications
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Specifications

Specifications
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