What is the difference between the form of FF and RF in the connection surfaces of flanges?
FF is a full flat flange, and the RF is a flange with a sealing surface.FF surface generally used in low pressure flanges, or sealing surface, need to be affixed with stainless steel lining ring sealing surface, corrosion resistance.
The difference is that one is the flower on the bar, and the other is the cannon under the bar
RF is a convex flange and can be used for PN1.6~PN10MPA.While FF is planar, the seal is not as good as RF, the pressure is 1.6~2.0MPA (standard GB9113), and other forms such as RTJ and FM are under higher pressure.RF FF gaskets are versatile.Flanges are also called flanges or flanges. The flange is the part that connects the pipe to the pipe and the valve and is connected to the end of the pipe. The flange is lined with bolts to secure the two flanges. Gaskets for gaskets between flanges. Flanges, threaded connections (wire connections), flanges and welded flanges and clamp flanges.
