The raw material steel pipes produced by the grid frame are divided into seamless steel pipes and seamed steel pipes. The editor of Huahai Grid Framework briefly introduces the seamless steel pipes that produce grid trusses! 

Steel structure and grid structure seamless steel pipes are rolled from a single piece of metal without joints in section. According to the production method, seamless steel pipes are divided into hot-rolled pipes, cold-drawn pipes, extruded pipes, etc.; according to the cross-sectional shape, they are divided into two types: round and special-shaped. Special-shaped steel pipes have various complex shapes such as square, ellipse, triangle, star and finned pipe; according to different purposes, there are thick-walled pipes and thin-walled pipes. 

Seamless steel pipes are mainly used in high-precision structural steel pipes for petrochemicals, automobiles, tractors, and aviation. The materials are ordinary carbon steel, high-quality carbon structural steel and alloy structural steel. The specifications of seamless steel pipes are expressed by the nominal outer diameter and wall thickness. For example, a Φ50x5 steel pipe is a seamless steel pipe with a nominal outer diameter of Φ50mm and a wall thickness of 5mm. For boiler pipes that bear a certain pressure and temperature, boiler seamless steel pipes are commonly used, and their components include carbon seamless steel pipes and alloy seamless steel pipes.