Flange flange short, just a general term usually refers to the periphery in a similar disk-shaped metal body open on several fixing holes for connecting to other things. This is something on the mechanical application of a very wide range, so it looks strange, as long as that is called a flange. Sealing surface forms: raised face (RF), uneven surface (MFM), tongue and groove (TG), ring joint face (RJ) Material: Carbon Steel (Carbon Steel): ASTM A105,20 #, Q235,16Mn, ASTM A350 LF1, LF2 CL1 / CL2, LF3 CL1 / CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70; stainless steel (Stainess Steel): ASTM A182 F304,304L, F316,316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321,18-8; alloy (Alloy Steel): ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11,16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8 / Ⅲ, 35CrMoV, 45CrMo and other manufacturing standards: ANSI B16.5, GB / T9117.1-2000-GB / T9117.4-200, HG20592-2009 (PN series) \ HG20615-2009 (Calss series) flange connection is the two pipes, fittings or equipment, each fixed to a first flange, between two flanges, with flange gasket, fastened together by bolts to complete the connection. Some fittings and equipment already comes with flange, also belong to the flange connection. Flanged connections is an important pipeline construction. Flanged easy to use, able to withstand greater pressure. In industrial pipe, use a very wide flange connection. Within the family, the pipe diameter is small, but low pressure, invisible flange connection. If a boiler room or the production site, everywhere flanged pipes and equipment.