Cold Drawn Seamless Steel Pipe Use

Cold drawn seamless steel pipe is a precision cold drawn seamless pipe with high dimensional accuracy and good surface finish for mechanical structures and hydraulic equipment. The use of precision seamless pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining time, improve material utilization, and improve product quality.

Cold drawn seamless steel pipe production and manufacturing method

According to different production methods, it can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe and extruded pipe. The biggest difference between cold drawn seamless steel pipe and hot rolled seamless steel pipe is that the precision of cold drawn seamless steel pipe is better than that of overheated seamless steel pipe. The general accuracy of cold drawn seamless steel pipe is about 20 wire, while hot rolling has no The precision of the seam pipe is about 100 filaments, so the cold drawn seamless steel pipe is the first choice for the mechanical processing manufacturing and parts manufacturing industry.

1. Hot-rolled seamless pipes are generally produced on automatic rolling mills. The solid tube blank is inspected and the surface defects are removed, cut into the required length, centered on the end face of the perforated end of the tube blank, then sent to a heating furnace for heating and perforated on the punching machine. At the same time, the perforation is continuously rotated and advanced. Under the action of the roll and the head, a cavity is gradually formed inside the tube blank, which is called a capillary tube. Then send it to the automatic pipe rolling machine to continue rolling. Finally, the machine is evenly thickened by the averaging machine, and the sizing (reducing diameter) of the sizing machine is reduced to meet the specification. The production of hot-rolled seamless steel tubes by continuous rolling mills is a more advanced method.

2. If you want to get a seamless tube with smaller size and better quality,

3. Extrusion method The tube blank to be heated is placed in a closed extrusion cylinder, and the perforated rod moves together with the extrusion rod to extrude the extrusion from the smaller mold hole. This method can produce steel pipes with smaller diameters.

Cold drawn seamless steel pipe

1. Seamless pipe is widely used. The general-purpose seamless pipe is rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, and has the largest output, and is mainly used as a pipe or structural part for conveying fluid.

2. According to the use of three types of supply: a, according to chemical composition and mechanical properties; b, according to mechanical properties; c, according to water pressure test supply. Steel pipes supplied in categories a and b, if used to withstand liquid pressure, are also subjected to hydrostatic testing.

3. Special-purpose seamless pipes include boiler seamless pipes, geological seamless pipes, and petroleum seamless pipes.

Type

1. Seamless steel pipes can be divided into hot rolled pipes, cold rolled pipes, cold drawn pipes and extruded pipes according to different production methods.

2. According to the shape, there are round tubes and special-shaped tubes. In addition to the square tube and the rectangular tube, the special-shaped tube has an elliptical tube, a semi-circular tube, a triangular tube, a hexagonal tube, a convex-shaped tube, a plum-shaped tube, and the like.

3. According to different materials, divided into ordinary carbon structural tube, low alloy structural tube, high quality carbon structural tube, alloy structural tube, stainless tube and so on.

4. According to special purposes, there are boiler tubes, geological tubes, oil pipes, etc.