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Seamless steel tube is a tubular structure made of a single piece of metal, which has the advantages of high strength, corrosion resistance, and good sealing. Therefore, seamless steel tubes are widely used in many fields, such as petroleum, chemical industry, electric power, construction, machinery manufacturing, etc. This article will introduce the production process, equipment selection and related aspects of seamless steel tubes.

The production process of seamless steel tube mainly includes the following steps:
Heat treatment: heating metal raw materials to a high temperature state to change its internal structure and improve the strength and hardness of the material.
Rolling: The heated metal raw material is plastically deformed through a rolling mill to form a tubular structure.
Straightening: The rolled steel pipe is straightened to ensure its straightness and roundness.

Surface treatment: Cleaning, polishing, anti-corrosion treatment, etc. are performed on the surface of steel pipes to improve its surface quality and corrosion resistance.

The selection of equipment for seamless steel tube production has an important impact on its quality and output. 

The following are some main equipment and their selection basis and principles:

1. Centrifugal casting: Used to produce high-quality steel pipes. The selection is mainly based on the scale of production, the type and nature of metal raw materials, the diameter and length of the product, etc.
2. Heat treatment furnace: The heat treatment furnace is a key equipment in the heat treatment stage. Its selection is mainly based on factors such as the type of material, heating speed, and holding time.

3. Rolling mill: The rolling mill is the key equipment in the rolling stage. Its selection is mainly based on the diameter, length, material, accuracy requirements, etc. of the product. When selecting, factors such as the production capacity, reliability, and maintenance costs of the equipment need to be taken into consideration.