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 fittings can be cast from it, can also be screwed or welded constitute criteria: German standard DIN, American Standard ANSI, ASME, British Standard BS, Japanese standard JIS, Italian standard UNI, Germany and China Standard GOST standard GB, HG , JB and so on. Our steel pipe flanges national standards GB 1) Nominal pressure: 0.25Mpa ~ 42.0Mpa a, Series 1: PN1.0, PN1.6, PN2.0, PN5.0, PN10.0, PN15.0, PN25 .0, PN42 (main series) b, Series 2: PN0.25, PN0.6, PN2.5, PN4.0 which PN0.25, PN0.6, PN1.0, PN1.6, PN2.5, PN4 A total of six grades of 0.05 flange size flange system belongs to Germany, represented by the European flange system, the rest of the United States of America as represented by the flange flange system. In GB standard, belonging to the European flange system of nominal maximum level for 4Mpa, belonging to the Inter-American system of nominal level flange maximum 42Mpa. Flange cover (HG20601, HG20622, GB / T9123, JB / T86), also known as Blind, its role is closed conduit or cut off the pipeline, mainly used for pipe end or head for use. Sealing surface with a flat, sudden face, convex face, tongue and groove and ring joint face. Flange Applicable standards: Ministry of Chemical Industry HG20601-1997, American Standard ANSI B16.5, Ministry of Chemical Industry HG20622-1997, GB GB / T9123.1-2000-GB / T9123.4-2000. Cover flange sealing surface: flat (FF), raised face (RF), convex surface (MFM), tongue and groove (TG), ring joint face (RJ) flange cover production materials: carbon (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;