Seamless steel pipe is a long steel bar with a hollow cross-section and no seams around it. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle racks and steel scaffolds used in construction. The use of steel pipes to manufacture ring-shaped parts can improve material utilization, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sleeves, etc. At present, steel pipes have been widely used for manufacturing. , Barrels, barrels, etc. are all made of steel pipes.
The seamed steel pipe is also called welded pipe, and is also divided into straight seam welded pipe and spiral welded pipe. It is a steel pipe made of steel plate or steel strip after crimping and welding. Welded steel pipe production process is simple, high production efficiency, many varieties and specifications, less equipment, but the general strength is lower than seamless steel pipe. Uses: low-pressure fluid delivery pipe, ordinary carbon steel wire sleeve, straight-seam welded steel pipe, galvanized welded steel pipe for low-pressure fluid delivery, spiral seam submerged arc welded pipe for pressure fluid delivery, spiral seam high-frequency for pressure fluid delivery Welded steel pipes, generally spiral welded submerged arc welded steel pipes for low-pressure fluid transportation, and spiral welded steel pipes for piles.
