The SMLS Pipe refers to the seamless steel pipe, which is a steel pipe made of a single piece of metal with no seams on the surface. According to the production method, seamless pipes are divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, and jacking pipes.
The manufacturing process of smls pipe:
The production methods of seamless steel pipes are roughly divided into cross rolling method (Munnesmann method) and extrusion method. The cross-rolling method (Munnesmann method) is to first perforate the tube embryo with a cross-roller, and then extend it with a rolling mill. This method has a fast production speed, but has high requirements on the machinability of the tube blank, and is mainly suitable for the production of carbon steel pipes and low alloy steel pipes.
The extrusion method is to use a piercer to perforate the tube billet or steel ingot, and then extrude it into a steel pipe with an extruder. This method is less efficient than the skew rolling method and is suitable for the production of high-strength alloy steel pipes.
Both the cross rolling method and the extrusion method must first heat the tube billet or ingot, and the produced steel tube is called a hot rolled tube. Steel pipes produced by hot working can sometimes be cold worked as needed. There are two methods of cold working: one is the cold drawing method, which is to draw the steel pipe through the drawing die to make the steel pipe gradually thinner and elongated; the other method is the cold rolling method, which is invented by the Mennesmann brothers. The hot rolling mill is applied to the method of cold working. The cold processing of seamless steel pipe can improve the dimensional accuracy and processing finish of the steel pipe, and improve the mechanical properties of the material.
The seamlessness of steel pipes is mainly accomplished by tension reduction, which is a continuous rolling process of hollow base metal without a mandrel. Under the condition of ensuring the welding quality of the parent pipe, the welding pipe tension reducing process is to heat the welded pipe as a whole to above 950 degrees Celsius, and then roll it into various outer diameters and wall diameters through a tension reducing machine (a total of 24 passes in the tension reducing machine). For thick finished pipes, the hot-rolled steel pipes produced by this process are essentially different from ordinary high-frequency welded pipes. After being heated by a heating furnace, the metallographic structure and mechanical properties of the weld seam and the parent body can be completely consistent. In addition, through multiple passes The first tension reducer rolling and automatic control make the dimensional accuracy of the steel pipe (especially the roundness and wall thickness accuracy of the pipe body) superior to similar seamless pipes.
Advantages of smls pipe:
1. High strength: The strength of smls pipe is much higher than that of ordinary steel pipe, which can resist greater pressure and is more suitable for construction, petroleum, chemical and other industries.
2. Strong corrosion resistance: smls pipes have good corrosion resistance and will not be affected by long-term exposure to corrosive environments.
3. Strong heat resistance: smls pipe has good heat resistance, can withstand high temperature, and is suitable for high temperature environment.
4. Compact structure: The inner and outer walls of the smls pipe have uniform thickness and compact structure, which is conducive to saving materials and reducing costs.
The smls pipe has a wide range of applications, it can be used in construction, petroleum, chemical industry, machinery manufacturing, electric power, automobile, shipbuilding, metallurgy, thermal power and other industries. The quality of the smls pipe is good and the price is not expensive, so it has been used more and more.
The manufacturing process of smls pipes is complicated and requires high requirements. During the production process, the quality of raw materials, temperature, humidity, pressure and other factors must be strictly controlled to ensure the stable quality of smls pipes. The smls pipe has good performance. It has a wide range of applications and can meet the needs of different industries. It is easy to use and economical. It is the product of many industries.
