The materials and uses of straight seam steel pipes vary. There are types of straight seam steel pipes:
1. Straight seam steel pipes are mainly used to transport general low-pressure fluids such as water, gas, air, oil, and heating steam. The pipe ends are divided into non-threaded steel pipes and threaded steel pipes. The specification of the nominal diameter steel pipe is usually in inches, which is an approximate value of the inner diameter. Straight seam steel pipes are used directly to transport fluids and as the original pipeline of galvanized welded steel pipes for low-pressure fluid transportation.
2. Ordinary carbon steel wire casing is a straight seam steel pipe used to protect wires in industrial and civil buildings, installation of machinery and equipment, and other electrical installation projects.
3. Straight seam steel pipes are straight seam steel pipes parallel to the length direction of the steel pipe. Usually divided into metric electric welded straight seam steel pipes, electric welded thin-walled straight seam steel pipes, and transformer cooling oil straight seam steel pipes.
4. Spiral seam submerged arc welding pressure fluid conveying straight seam welded steel pipe is a spiral welded steel pipe made of hot-rolled strip steel, usually formed by temperature spiral, and welded by double-sided submerged arc welding to convey pressure fluid. The steel pipe has strong pressure-bearing capacity and good welding performance. After various rigorous scientific inspections and tests, it is safe and reliable to use. The steel pipe has a large diameter and high transportation efficiency, which can save the investment in laying pipelines. It is mainly used for oil and natural gas pipeline transportation.
5. Spiral weld high-frequency welded steel pipe for pressure fluid transportation is a spiral welded pipe using high-frequency lap welding, usually made of hot-rolled strip steel coils, high-frequency lap welding, and used for the transportation of pressure fluids. The steel pipe has strong pressure-bearing capacity, good plasticity, and convenient welding processing. After various rigorous scientific inspections and tests, it is safe and reliable to use. The steel pipe has a large diameter and high transportation efficiency. This can save the investment in laying pipelines. It is mainly used for oil and natural gas transportation.
6. It is a kind of hot-rolled steel strip coil as a pipe blank, usually formed by double-sided automatic submerged arc welding or single-sided welding.
7. The spiral welded high-frequency welded steel pipe generally used for low-pressure fluid transportation is a spiral welded high-frequency welded steel pipe formed at a certain temperature with hot-rolled strip steel as the tube blank.
8. Spiral welded steel pipes for piles are made of hot-rolled steel strips and are usually formed by double-sided submerged arc welding or high-frequency welding. They are suitable for foundation piles such as civil structures, docks, and bridges. The production process is simple, the production efficiency is high, the cost is low, and the rapid development of straight seam steel pipes, larger diameter welded pipes can be produced with narrower billets, and welded pipes of different diameters can be produced with the same billet width. This also reduces productivity, it increases the weld length by 30% and 100% compared with straight pipe joints.