Flange

Flange connection or flange joint is defined by the flange, elbow, gasket and bolts connected to each other as a set of three composite sealing structure can be folded link means the pipe flange pipe flange for piping device, equipment means the equipment used in the import and export flange. International standards on several system pipe flange Flange system in Europe: Germany din (including the Soviet Union) British standard bs French standard Italian standard uni nf Nominal pressure: 0.1, 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.4, 10.0, 16.0, 25.0, 32.0, 40.0, mpa Public Operators Path: 15 4000mm (maximum diameter flange size and flange with the selected pressure levels corresponding change in different dimensions) Flange structure type: flat welding plate, flat weld loose sleeve, crimping loose sleeve, loose sleeve crimp butt, butt ring loose sets, welded type, with neck threaded connection type, the overall and flange covers Flange sealing surface are: flat, concave, convex surface, tongue and groove, rubber ring joint face, the lens surface and the patch welding surface The Soviet Union in 1980 with the release of oct recorded standard pipe flange din standard similar to Germany, will not go into Flange: in the petrochemical plant in general only for public works, less influence in the international arena, has not formed an independent in the international system. American Flange System: U.S. ansi b16.5 "steel pipe flanges and flanged fittings" ansi b16.47a / b "large diameter steel flanges" b16.36 character flange plate flange b16.48 . Nominal pressure: 150psi (2.0mpa), 300psi (5.0mpa), 400psi (6.8mpa), 600psi (10.0mpa), 900psi (15.0mpa), 1500psi (25.0mpa), 2500psi (42.0mpa), Public Operators Path: 6 4000mm Flange sealing surface: concave, convex surface, tongue and groove, metal ring connections surface Flange structure type: Article welding, socket welding, threaded connections, loose, welded and flange covers