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What are the main types of pipe welded steel pipes?
Time: 2018-08-31 10:40 Author: admin Hits: Times
Welded steel pipes, also called welded pipes, are welded with steel plates or steel strips. Welded pipe has simple process, high production efficiency, various specifications and few equipment, but the overall strength is lower than that of seamless steel pipe. Since the 1930s, with the rapid development of high-quality strip continuous rolling production and the improvement of welding inspection technology, the quality of welds has been improved, and the variety and specifications of welded steel pipes have been increasing. Seam steel pipe. Welded steel pipes are divided into longitudinal welded pipes and spiral welded pipes according to the welding form.
The longitudinal welded pipe has the advantages of simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipes is generally higher than that of straight welded pipes. It can produce a larger tube with a narrow blank, and a blank of the same width can be used to produce a tube of a different diameter. But compared with the straight seam pipe of the same length, the weld seam length has increased by 30-100%, and the production speed is slower. Therefore, small diameter welded pipes are mostly longitudinal welded pipes, and large diameter welded pipes are mostly spiral welded pipes.
Welded pipes for low-pressure fluid transport are also called universal welded pipes, commonly known as clarinets. Used to transport water, gas, gas, oil, hot steam and other low-pressure fluids and other uses of welded steel pipes. The steel pipe wall is thickened into ordinary steel pipe and thickened steel pipe. The nozzle end is divided into non-threaded steel pipe (light pipe) and threaded steel pipe.
The specifications of the steel pipe are expressed by the nominal diameter (mm), and the nominal diameter is an approximate value of the inner diameter. Usually used for inches, such as 11/2. Welded pipe for low-pressure fluid transport, not only directly used to transport fluid, but also galvanized steel pipe for the original pipeline for low-pressure fluid transport.