Welded steel pipe, also known as welded pipe, is a steel pipe made of steel plate or steel strip after being crimped and welded. Welded steel pipe has a simple production process, high production efficiency, many varieties and specifications, and less equipment, but its general strength is lower than that of seamless steel pipes. Since the 1930s, with the rapid development of high-quality strip steel continuous rolling production and the advancement of welding and inspection technology, the quality of welds has been continuously improved, the varieties and specifications of welded steel pipes have been increasing, and more and more fields have replaced non-ferrous steel. Seam steel pipe. Welded steel pipes are divided into straight seam welded pipes and spiral welded pipes according to the form of the weld.
The production process of straight seam welded pipe is simple, the production efficiency is high, the cost is low, and the development is fast. The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe, and the welded pipe with a larger diameter can be produced with a narrower billet, and the welded pipe with different pipe diameters can also be produced with a billet of the same width. But compared to the same length of straight seam pipe, the length of the weld is increased by 30-100%, and the production speed is lower. Therefore, most of the welded pipes with smaller diameters use straight seam welding, and most of the welded pipes with large diameters use spiral welding.
Welded steel pipes also include welded steel pipes for low pressure fluid transportation, galvanized welded steel pipes for low pressure fluid transportation, ordinary carbon steel wire sleeves, straight seam electric welded steel pipes, spiral seam submerged arc welded steel pipes for pressurized fluid transportation, and pressure fluid transportation. Spiral seam high frequency welded steel pipe, spiral seam submerged arc welded steel pipe for low pressure fluid transportation, spiral seam high frequency welded steel pipe for low pressure fluid transportation, spiral welded steel pipe for pile.
Post time: Jul-20-2022