steel pipe

Seamless steel pipes are hollow steel products manufactured through hot rolling or cold rolling processes, possessing higher overall strength and pressure resistance due to their of welds. They are widely used in various industries, including petroleum, chemical engineering, and mechanical manufacturing.

Seamless steel pipes are long strips of steel with a hollow-section and no joints around the periphery, formed by piercing and rolling a whole piece of metal.21 They are mainly distinguished from welded steel pipes by their production and structural integrity—seamless steel pipes are produced by heating and piercing steel ingots or solid tube blanks, followed by hot rolling, cold rolling, or cold drawing avoiding potential weak points caused by welds.3 This manufacturing method makes them more suitable for high-pressure and high-strength working environments, thus becoming an important material in industrial. Main classifications and uses Seamless steel pipes can be divided into various types based on their production process, material, and use: By production process: -rolled seamless pipes: Suitable for large diameters (such as above Φ325mm) and medium to low-pressure scenarios, with high production efficiency. old-rolled/cold-drawn seamless pipes: High dimensional accuracy (tolerance can reach ±0.05mm) and good surface finish, often used in precision instruments and systems, etc.