Spiral pipe and its standard classification: Oil pipeline spiral steel pipe (SY5036-83) for pressure fluid transportation is mainly used to transport oil and natural gas pipelines; spiral seam high-frequency welded steel pipe (SY5038) for pressure fluid transportation -83), spiral seam high-frequency welded steel pipe welded by high-frequency lap welding method for pressure fluid transportation. The steel pipe has strong pressure bearing capacity and good plasticity, which is convenient for welding and processing and forming. Generally, the spiral seam submerged arc welded steel pipe for low-pressure fluid transportation (SY5037-83) is made of water, Submerged arc welded steel pipes for general low-pressure fluid transportation such as gas, air, and steam.
At present, the commonly used standards for spiral steel pipes are generally divided into SY / T5037-2000 (ministry standard, also called spiral seam submerged arc welded steel pipe for general fluid transportation pipelines), GB / T9711.1-1997 (national standard, also called oil and gas industry transportation Technical delivery conditions of steel pipe Part 1: A-grade steel pipe), API-5L (American Petroleum Institute, also called pipeline steel pipe), SY / T5040-92 (spiral seam welded steel pipe for piles)
Spiral tube material: Q235A, Q23b, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb. Q345 L245 L290 X42 X46 X70 X80
Welded steel ssaw spiral pipe refers to a steel pipe or steel plate that is bent and deformed into a round or square shape and then welded into a steel pipe with a seam on the surface. According to different welding methods, it can be divided into arc welded pipe, high frequency or low-frequency resistance welded pipe, gas welded pipe, furnace welded pipe, Bondi pipe, etc. According to the shape of the weld, it can be divided into straight seam welded pipe and spiral welded pipe. Welded steel pipes are used in oil drilling and machinery manufacturing. Furnace welded pipes can be used as pipes, etc., large diameter straight seam welded pipes are used for high-pressure oil and gas transportation, etc .; spiral welded pipes are used for oil and gas transportation, pipe piles, bridge piers, etc. Welded steel pipe has lower cost and higher production efficiency than the seamless steel pipe.
Oil Pipeline Spiral Steel Pipe
The straight seam welded pipe production process is simple, high production efficiency, low cost, and rapid development. Spiral pipe supplier china believes that spiral welded pipe generally has higher strength than straight-seam welded pipe. It can use narrow blanks to produce larger diameter welded pipes, and can also use blanks of the same width to produce pipes with different diameters. Welded pipe. But compared with the straight pipe of the same length, the length of the weld is increased by 30-100%, and the production speed is lower. Therefore, the weld pipes with smaller diameter are mostly welded by straight seam, and the weld pipes with a larger diameter are mostly spiral welded.