Integral flange

The whole sub-thread pipe flange connection (wire tapping) the overall integral flange and welding flange. Low-voltage wire connected with the overall small-diameter flange, high pressure and low pressure are the use of large diameter welded integral flange, different pressures and the overall thickness of flange bolt diameter and the number is different. According to the different levels of pressure, the overall flange pads have different material, asbestos mat from the low and high pressure to the metal pads are asbestos pad. 1. The material by steel flange, steel flange, steel flange, stainless steel flanges, copper flanges, aluminum flange, plastic flange, flange Lek Ar Ge, ppc flange. 2. To production methods can be divided into the overall flange forging, casting the whole flange, welding the whole flange, flange roll as a whole (large number) 3. To create criteria can be divided into national standards (Ministry of Chemical Industry standards, petroleum standards, power standards), American standard, Germany standard, Japanese standard, the Russian standard and so on. International standards on several system pipe flange 1, flange connection or flange joint is defined by flanges, gaskets and bolts connected to each other as a set of three composite sealing structure can be folded link means a pipe flange pipe flange for piping device, with on the device means equipment import and export flange. 2, the international standard on several system pipe flange 1) European flange system: the German DIN (including the Soviet Union), the British standard BS French standard NF Italian standard UNI a, 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 b, the public operator diameter: 15 4000mm (maximum diameter and the selected flange size and flange pressure levels corresponding change in different dimensions) c, the structure of flange types: flat plate welding, flat weld loose sleeve, crimping loose sleeve, loose sleeve crimp butt, butt ring loose-style, welded type, with neck threaded connection type, integral and flange covers d, flange sealing surface are: flat, concave, convex surface, tongue and groove, rubber ring joint face, the lens surface and the patch welding surface e, the Soviet Union in 1980 with the release of OCT pipe flange standards recorded with the German DIN standard is similar to not repeat them 2) American Flange System: U.S. ANSI B16.5 "steel pipe flanges and flanged fittings" ANSI B16.47A / B "large diameter steel flanges" B16.36 Orifice Flanges B16.48 character method orchids. a, nominal pressure: 150psi (2.0Mpa), 300psi (5.0Mpa), 400psi (6.8Mpa), 600psi (10.0Mpa), 900psi (15.0Mpa), 1500psi (25.0Mpa), 2500psi (42.0Mpa), b, the public operator diameter: 6 4000mm c, flange structure type: Article welding, socket welding, threaded connections, loose, welded and flange covers d, flange sealing surface: concave, convex surface, tongue and groove, metal ring connections surface 3) *** JIS pipe flanges: in the petrochemical plant is only used for public works in general, little influence in the international arena, has not formed an independent in the international system. 3, China's national standards for steel pipe flanges 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 One PN0.25, PN0.6, PN1.0, PN1.6, PN2.5, PN4.0 grades 6 belongs to the flange dimensions as the representative of Germany, Europe flange flange system, the rest of American Law Blue America as represented by the flange system. In the GB standards, subordinate to the European level the maximum nominal pressure flange system for 4Mpa, subordinate to the American system of nominal level flange maximum 42Mpa. 2) Nominal diameter: 10mm 4000mm 3) flange structure: Integral flange Flange unit a, threaded flange b, welded flange welded flange With neck-welding neck flange Socket welding flange plate with welded flange c, loose flange welded neck flange with ring Loose Loose plate flange ring butt weld flat Loose plate flange plate turn loose flanges d, flange cover (blind hole flange) e, rotating flange f, Anchor Flange g, welding / cover flange welding 4) flange sealing surface: flat, concave, convex surface, tongue and groove face, ring joint face Second, the instruments commonly used in pipe flange standards 1, DIN standards 1) Common Pressure Level: PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160, PN250 2) flange sealing surface: raised face DIN2526C raised face flange grooued acc. DIN2512N tongue and groove 2, ANSI standard 1) common pressure levels: CL150, CL300, CL600, CL900, CL1500 2) flange sealing surface: ANSI B 16.5 RF flanges raised face flange 3, JIS standard: not used 1) common pressure levels: 10K, 20K...