The specification table of seamless steel pipe is shown in the figure below:
Seamless steel pipe is a long steel material with no seams around it and has a hollow section. It is widely used for transporting fluids. Compared with solid steel, pipes are lighter in weight when subjected to the same flexural and torsional strength. They are an economical cross-section steel and are widely used in the manufacture of structural parts and mechanical parts.
In terms of caliber, lt;φ76 accounts for 35, and lt;φ159-650 accounts for 25. In terms of varieties, general-purpose pipes accounted for 1.9 million tons, accounting for 54%; oil pipes accounted for 760,000 tons, accounting for 5.7%; hydraulic props and precision pipes accounted for 150,000 tons, accounting for 4.3%; stainless steel pipes, bearing pipes, and automobile pipes accounted for 50,000 tons , accounting for 1.4.
Notes on purchasing seamless steel pipes
1. Go to a large conventional steel pipe company to purchase. Regular large companies generally purchase or act as agents from relatively well-known large-scale seamless steel pipe companies in China, and the quality is guaranteed.
2. Check the product quality certificate issued by the seamless steel pipe manufacturer and the certificate number for production license management.
3. Choose appropriate specifications, because seamless steel pipes of different specifications are used in different fields and have different functions.
4. Choose seamless steel pipes with different processes, because seamless steel pipes can be divided into cold rolling and hot rolling. With different production processes, the characteristics of steel pipes are also different, and the applicable fields are naturally different.
5. For seamless steel pipes of the same specification, you can consult different manufacturers and compare them repeatedly. If they are far below the average, you cannot buy them.
6. Pay attention to observation. The surface of seamless steel pipes is not allowed to have defects such as cracks, scars, and folds.