Weld Neck Flange Long Neck Pipe Flange
Weld neck flange Weld neck flange features high deformation resistance.great sealing performance,wide application range,good rigidity,resilience and reasonable thinning transition for butt welding.Distant from the welding seam,the adjoining face won't deform due to high welding temperature. Hence,the flange is suitable for pipelines with large change of pressure and temperature or tubes with high valves where the working pressure is larger than 2.5Mpa.It is also applied on pipelines for transportation of expensive. Inflammable and explosive matter. Produced by unique production process,our flange has long neck,which leads to high price.However,it can be used in high-pressure situations,During butt welding,the tensile stress that the neck or the concentration imposes on the hub plays an important role of strengthening the flange.The flange hole can perfectly match with corresponding pipe hole,thus alleviating turbulence and erosion. Available Sizes 3/8＂~160＂,DN10~DN4000 Standards GB/T9112-2000,GB/T9113.1-2000,GB/T9113.2-2000,GB/T9113.3-2000,GB/T9113.4-2000,GB/T9124-2000,GB/T13402-1992 HG/T20592-2009,HG/T20614-2009,HG/T20615-2009,HG/T20623-2009,HG/T20635-2009 ASTM B16.5-2009,ASTM B 16.47-2006 API605-1988 MSS SP 44-2006 CSA Z 245.12-05-2005 EN,EN BS1560-3.1-1989,BS4504-3.1-1989 AFNOR NF E ISO AS2129-2000 JIS B2220-2004 Raw Materials Carbon steel:A105 Alloy steel:A182F 1-F 2-F 5-F 9-F 10-F 91-F 92-F 122-F 911-F 11-F 12-F 21-F 22 Stainless steel:A182 304-304H-304L-304N-304LN 316-316H-316L-316LN 321-321H 347-347H Low-temperature steel:A522 A707 Grade L 1-L 2-L 3-L 4-L 5-L 6-L 7-L 8 High-performance steel:A694 F 42-F 46-F 48-F 50-F 52-F 56-F 60-F 65-F 70F Pressure Grade American System:CLASS150,CLASS300,CLASS400,CLASS600,CLASS900,CLASS1500. European System:PN2.5,PN6,PN10,PN16,PN25,PN40,PN63,PN100. Flange Facing Flat face(FF),Raised face(RF),Tongue face(T),Groove face(G),Female face(F),Male face(M),Ring joints face(RJ). Producing Process Cutting of Raw Material-Die Forging-Machining Application The flange is widely used in many areas such as power generation plant, petroleum industry,natural gas system,chemical industry,shipbuilding industry,heating system,paper-making industry,metallurgy industry,etc.
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