... a bore in the center, blind flange is designed to block off pipelines.Available Sizes 3/8"~ ... System:PN2.5,PN6,PN10,PN16,PN25,PN40,PN63,PN100. Flange Facing Flat face(FF),Raised face(RF),Tongue face(T ... Process Cutting of Raw Material-Die Forging-Machining Application The flange is widely used in many areas such as power generation ...