pipe flange professional pipe fittings, factory supply，pipe flange, flange pipe fitting is a kind of welded pipe fitting. Such pipe fittings are used to match the pipeline. Some are processed, and some don’t need to be processed. Some castings are made by casting all the flanges together. The welding is post-processed. It can be processed in the factory or on the construction site. There are large and small flange pipe fittings, as well as elbow and three-way flange pipe fittings. Its materials are also diverse, including carbon steel, alloy steel, stainless steel and so on.