Nov 19, 2018
The butt weld flange is the same as the pipe to be welded at the joint end, and is welded like two pipes. The Flat Flange is a concave table that is slightly larger than the outer diameter of the pipe at the interface, and the pipe is welded inside.
Butt welding has better welding performance and less corrosion.
DI Flanged Pipe Fittings Manufacturer tell you flat welding and butt welding are welding methods when flanges and pipes are connected. When welding flat welding flanges, only one side welding is required, and the inner joints of welded pipes and flanges are not required. The welding of the welded flanges requires flange double. Face welding. Therefore, flat welding flanges are generally used for low and medium pressure pipes. Butt welding flanges are used for the connection of medium and high pressure pipes. Butt welding flanges are generally at least PN2.5 MPa. Butt welding is used to reduce stress concentration. The welding flange is mostly a Long Weld Neck Flange and also a nipple flange. Therefore, the installation cost of the welding flange, labor costs and auxiliary materials costs are higher, because there is more than one process.
For the welding flange, not all of them need to be welded inside and outside. There is no special requirement. Generally, it is only welded outside. I have not seen the 1/2" butt welding flange:), the flat welding is better. Because the tube and flange are right and vertical, the tube will not be inclined.