Welded steel pipes in small air separation unit, also known as seamed steel pipes, are generally made of steel sheets or steel strips rolled and welded.
According to the surface treatment form of the pipe: divided into galvanized and ungalvanized two. The surface of galvanised white, also known as white iron pipe or galvanised steel pipe; the surface is not galvanised, that is, ordinary welded steel pipe, also known as black iron pipe. Galvanised welded steel pipes, commonly used for conveying media requiring cleaner pipelines, such as domestic water, purified air, instrument air, etc.; welded steel pipes without galvanisation, can be used to transport steam, gas, compressed air and condensate, etc. Welded steel pipes can be divided into those with threaded ends, and those without threaded ends. Welded steel pipe by wall thickness: divided into thin-walled steel pipe, thickened steel pipe and ordinary steel pipe. The most used on the process pipeline is the ordinary steel pipe, the test pressure of 2.0 MPa. thickened steel pipe test pressure of 3.0 MPa. welded steel pipe coupling methods more: threaded coupling, flange coupling and welding. Flange coupling is divided into threaded flange coupling and welding flange coupling, welding methods are divided into gas welding and arc welding.
Dear air is well versed in the development of science and technology innovation as the main theme, technological innovation to lead industrial upgrading, industrial digitalization, intelligent promotion, welding a variety of steel pipe high quality to meet the application of small air separation unit and large separation unit.
