Manufacturing principle and application of seamless pipe (SMLS):

1. The production principle of seamless pipe

The production principle of the seamless pipe is to process the steel billet into a tubular shape under the conditions of high temperature and high pressure, so as to obtain a seamless pipe without welding defects. Its main production process includes cold drawing, hot rolling, cold rolling, forging, hot extrusion and other methods. During the production process, the inner and outer surfaces of the seamless pipe become smooth and uniform due to the influence of high temperature and high pressure, thus ensuring its high strength and corrosion resistance, and also ensuring that it will not leak when used.

In the whole production process, the cold drawing process is the most important part in the seamless pipe production process. Cold drawing is the process of using a cold drawing machine to further process the rough steel pipe into a seamless pipe. The rough steel pipe is gradually cold drawn by the cold drawing machine until the wall thickness and diameter required by the steel pipe are reached. The cold drawing process makes the inner and outer surfaces of the seamless steel pipe smoother, and improves the strength and toughness of the steel pipe.

2. The scope of application of seamless pipe

Seamless pipes are widely used in petroleum, chemical, machinery manufacturing, petrochemical and other industries, and their application scenarios have the characteristics of high strength, high temperature, high pressure, and corrosion resistance. For example, in the field of oil and natural gas extraction, seamless pipes are used to transport oil, gas and water; in the chemical industry, seamless pipes are widely used in important scenarios such as high-pressure pipelines and chemical equipment.

Different types of seamless pipes have their own characteristics and application scenarios, including ordinary seamless steel pipes, low alloy seamless steel pipes, high alloy seamless pipes, etc. Ordinary seamless steel pipes are suitable for general occasions and are widely used in the fields of machining, shipbuilding, chemical and petrochemical industries; low alloy seamless steel pipes are suitable for special working conditions such as high pressure, high temperature, low temperature and strong corrosion resistance; high alloy seamless pipes It is suitable for special environments with high temperature, high pressure, strong corrosion and high wear resistance.

In general, seamless pipes are widely used in the national economy, and their advantages are mainly reflected in their high strength, corrosion resistance, high temperature resistance, etc. At the same time, their production processes are also very complicated, requiring a high degree of technical mastery and production experience accumulation.