Tianjin Seamless Steel Tube Factory is a large-scale seamless steel tube enterprise. *Manufactures and sells Tianjin's large seamless steel tubes, and exports various oil casing pipes, structural pipes, fluid pipes, high-pressure pipes, alloy pipes, in compliance with national standards; GB8162-2008; GB8163-2008; GB5310-2008.12CR1MOVG; 15CRMOG; P110. Quality guaranteed, variety abundant, agency for oxygen吹管; sizes from small 8*1 to large 180; seamless steel tubes ranging from small diameter 6*1mm to large diameter 820*10-180mm, favored by both new and old customers.

Solid bending, as the name implies, is the compression bending, where both the inner and outer rolls compress the inner and outer walls of the billet. 1) The advantages of solid bending are minimal springback, accurate shaping, and as long as the roll shape is accurate, the radius of the internal angle shape is also accurate. 2) The disadvantages include stretching/thinning effects. Solid bending causes stretching at the bending area, which shortens the longitudinal length of the bending line; the metal at the bending area becomes thinner due to stretching. 2. Hollow bending Hollow bending is formed by the unidirectional contact of the outer roll with the outer wall of the billet, creating a bending moment to bend the strip. Hollow bending causes compression in the bending line, resulting in the longitudinal elongation of the bending line and the metal at the bending area becoming thicker, which is the compression/thickness effect of hollow bending. 1) The advantages of hollow bending are that it can bend the edge lengths when solid bending is not possible, such as simultaneous bending and finishing of the upper/side edges of square rectangular tubes. Hollow bending can also bend R

The advantages of hot-rolled seamless steel pipes include the ability to disrupt the casting structure of the ingot, refine the grain structure of the steel, and eliminate defects in the microstructure, making the steel structure denser and improving its mechanical properties. This improvement is primarily evident along the rolling direction, making the steel pipes somewhat anisotropic to a degree; bubbles, cracks, and疏松 formed during casting can also be fused under high temperature and pressure.