After air drawing, the surface area of the outer surface of the seamless steel pipe increases, and the surface area of the inner surface decreases, and a neutral layer is required between the inner and outer layers.

3pe anticorrosive steel pipe is used in different working environments. In order to slow down or prevent the pipeline from being corroded and deteriorated by the chemical or electrochemical action of the external medium or by the metabolic activity of microorganisms, the outer wall of the pipe is coated with 2 or 3 layers.

The packaging of large-diameter seamless steel pipes should be able to prevent slack and damage during all normal handling, handling, transportation and storage.

The finished thick-walled seamless steel pipes are sent to the inspection department for product quality inspection after finishing, which is an important measure to ensure the quality of the thick-walled seamless steel pipes.

The main purpose of alloy steel pipes is to use in power plants, nuclear power, high-pressure boilers, high-temperature superheaters and reheaters and other high-pressure and high-temperature pipelines and equipment.

The cold rolling of seamless tube and steel tube transforms martensite into seamless tube and steel tube before the rolled piece enters the finishing rolling extruder. Rough rolling is still carried out under full martensite conditions.