Hebei Shengtian Pipe-Fitting Group Co. manufacturer introduces the difference between butt welding flange and flat welding flange:
The pipe diameter and wall thickness of the butt welding flange at the interface end are the same as the pipe to be welded, so it is welded like two pipes.
The flat welding flange is a concave platform slightly larger than the outer diameter of the pipe processed at the interface, and the pipe is inserted and welded inside.
Flat welding and butt welding are the welding methods used when connecting flanges and pipes. When welding flat welding flanges, only one weld is needed. Internal parts do not require welded pipe and flange connections.
The welding installation of butt welding flange requires flange. Surface welding. Therefore, low and medium pressure pipelines generally use flat welding flanges, and medium and high pressure pipelines use butt welding flanges. Butt welding flanges are generally at least PN2.5MPa.
Use butt welding to reduce welding stress. Butt welding flange flanges are mostly neck flanges. Also called welding flange. Butt welding flange has better welding performance and less corrosion. Therefore, the installation cost, labor cost, and auxiliary material cost of the butt welding flange arise due to many problems.
Not all butt weld flanges require outside south pole welding. If there are no special requirements, it is usually only welded on the outside.
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