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Material selection analysis of seamless steel pipe manufacturer

Seamless steel pipe factory is a kind of round, square and rectangular steel with hollow section and no joints around. Seamless steel pipe is made of steel ingot or solid tube blank through perforation, and then made by hot rolling, cold rolling or cold drawing.

Seamless steel pipe has a hollow section and is widely used as a pipeline for conveying fluid. Compared with solid steel such as round steel, the steel pipe has the same bending and torsional strength and is lighter. It is an economic section steel. It is widely used to manufacture structural parts and mechanical parts, such as steel scaffold of oil drill.

Development history of seamless steel pipe: the production of seamless steel pipe has a history of nearly 100 years. The German Mannesmann brothers first invented the two roll cross rolling piercer in 1885, and the periodic pipe mill in 1891. In 1903, the Swiss R.C. stiefel invented the automatic pipe mill (also known as the top pipe mill). After that, various extension machines such as continuous pipe mill and pipe jacking machine appeared, which began to form the modern seamless steel pipe industry.

In the 1930s, due to the use of three roll pipe rolling mill, extruder and periodic cold rolling mill, the variety and quality of steel pipes were improved. In the 1960s, due to the improvement of continuous pipe mill and the emergence of three roll piercer, especially the success of tension reducing mill and continuous casting billet, the production efficiency was improved and the competition ability between seamless pipe and welded pipe was enhanced. In the 1970s, seamless pipe and welded pipe were keeping pace, and the world steel pipe output increased at a rate of more than 5% per year. Since 1953, China has attached importance to the development of seamless steel pipe industry, and has initially formed a production system for rolling all kinds of large, medium and small pipes. Generally, copper pipes also adopt the processes of billet cross rolling and piercing, pipe rolling machine rolling and coil stretching.