Feb. 01, 2021
Seamless steel pipe is a steel pipe without welded seams manufactured by hot processing methods such as piercing and hot rolling. If necessary, the thermally processed tubes can be further cold worked to the required shape, size and performance. Currently, seamless steel pipes (DN15-600) are the most used pipes in petrochemical production units.
Seamless steel pipe is a round, square and rectangular steel with a hollow cross-section and no peripheral seams. Seamless steel pipe is made from ingots or solid billets that are perforated into a burr tube and then hot rolled, cold rolled or cold punched. Seamless steel pipe has a hollow cross-section and is used in large quantities as a pipeline for transporting fluids. Compared with solid steel such as round steel, steel pipe is lighter in weight when the bending and torsional strength is the same and is economic section steel, widely used in the manufacture of structural and mechanical parts, such as steel scaffolding for oil drilling, etc. Next seamless steel pipe supplier will introduce the development history and use of seamless steel pipe
Seamless steel pipe production has a history of nearly 100 years.
German Mannesmann brothers in 1885 first invented the two-roller slant-rolling perforating machine, and in 1891 invented the cycle rolling machine, in 1903 the Swiss Stiefel (R.C. Stiefel) invented the automatic rolling machine (also known as the top-head rolling machine), and later appeared in the continuous rolling machine and top tube machine and other extension machines, the formation of modern seamless steel pipe industry began.
The 1930s due to the use of the three-roller rolling mill, extrusion machine, periodic cold rolling mill, improved the quality of steel pipe varieties. 60s due to the improvement of continuous rolling mill, the emergence of the three-roller perforating machine, especially the application of tension reduction machine and the success of continuous casting billet, improved production efficiency and enhanced the ability of the seamless pipe to compete with the welded pipe. 70s seamless pipe and the welded pipe is going hand in hand, the world's steel pipe production to The world steel pipe production is increasing at a rate of more than 5% per year.
China attaches importance to the development of a seamless steel pipe industry after 1953, has formed the initial production system of rolling various large, medium and small tubes. Copper pipe is also generally used in the ingot billet diagonal rolling perforation, rolling mill rolling, coiled tube stretching process.
Uses: Seamless steel pipe is economic section steel, has a very important position in the national economy, widely used in petroleum, chemical, boiler, power station, ships, machinery manufacturing, automotive, aviation, aerospace, energy, geology, construction and military industry and other sectors.
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