refer to steel pipes with seams on the surface that are welded after bending and deforming steel strips or steel plates into round or square shapes. The billet used for welded steel pipe is steel plate or strip steel. 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.
refer to steel pipes with seams on the surface that are welded after bending and deforming steel strips or steel plates into round or square shapes. The billet used for welded steel pipe is steel plate or strip steel. 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.1. Different appearance:Seamed steel pipes have weld bars on the inner wall of the welded pipe; while seamless steel pipes have no weld bars on the inner wall of the welded pipe2. The pressure is different:The seamed steel pipe is about 10 MPa; while the pressure of the seamless steel pipe is relatively high.3. Different uses:Seamed steel pipes are mainly used in the construction industry; while seamless pipes are mainly used in the machinery industry.4. The process is different:Seamed steel pipes need to be rolled and welded; while seamless steel pipes are formed in one pass during rolling.1. The maximum working pressure that the seamed pipe can generally withstand is within 20 kg, which is the safest range of use. It is generally used for water, gas, compressed air and other low-pressure fluids:2. The seamless pipe can withstand ultra-high pressure, and of course its wall thickness will increase accordingly, which needs to be designed according to the pressure requirements. It is generally used in high-temperature and high-pressure equipment such as high-pressure oil pipes and boiler pipes.