The production and manufacturing process of thick-walled seamless steel pipe production can be divided into four basic ways: cold-drawn, cold-rolled, hot-rolled, and hot-expanded. The material of the steel pipe is 10#, 20#, 35#, 45# called ordinary steel pipe. Seamless steel pipe is expressed in terms of outer diameter, wall thickness, thick-walled seamless steel pipe mainly used for machining, coal mining, hydraulic steel, and many other applications.