Plate flat welding flange sealing surface: flat (FF), raised face (RF) production materials: stainless steel (Stainess Steel): 201,202,301,304,304L, 316,316L, 321, stainless steel flanges applicable standardization Industry HG20593-1997, GB GB / T9119 -2000, machine standard JB / T81-94 main dimensions and connecting dimensions reference plate flat welding flange (flange) is to connect two pipes, fittings or equipment attached to each one of the flange, the two flanges between the plates, plus flange gasket, bolted together to complete the connection. Some fittings and equipment already comes with flange, also belong to the flange connection. Flanged connections are important pipeline construction. Flange (Flange) also known as the flange or flange flange tube and pipe is interconnected parts, connected to the pipe end. There are holes on the flange, so that the two flange bolts abuts Inter flange lining gasket seal flange points threaded connection (wire connected) flange and welding flange. Pressure Flange (sae flange JBZQ 4187-97) flanged fittings (flanged pipe fittings) refers to the flange (flange or disk access) with The tubular member which may be cast from, can also be screwed or welded constituted.