Hebei Xinyue provide a series of Russian standard of flanges in carbon steel and stainless steel, include main types of Plate, Welding Neck, Blind.
Plate Flange is the most common flange, it 's wihtout a low or high hub. The pipe is welded onto inside of the bore of the flange.
Welding Neck Flange
Welding Neck Flange is generally referred to as a "high hub" flange. It is designed to transfer pressure to the pipe and reduce high pressure at the base of the flange. Welding Neck Flange is a butt-welding flange with the best design among currently available flanges because of its unique structure.