ANSI-ASME-FLANGE-types参考标准规范

HEBEI HAIHAO GROUPISO.ABS.CE/PED APPROVEDMengcun,Cangzhou,Hebei,ChinaProfessional Steel Piping SolutionHAIHAO GROUPwww.haihaopiping.comEmail:sales@haihaogroup.comFlanges General InformationA Flange is a method of connecting pipes,valves,pumps and other equipment to form apipework system.It also provides easy access for cleaning,inspection or modification.Flanges are usually welded or screwed into such systems and then joined with bolts.Flange TypesWeld NeckThis flange is circumferentially welded into the systemat its neck which means that the integrity of the buttwelded area can be easily examined by radiography.The bores of both pipe and flange match,whichWeld Neckreduces turbulence and erosion inside the pipeline.The weld neck is therefore favoured in criticalapplicationsSlip-onWeldThis flange is slipped over the pipe and then filletSlip Onwelded.Slip-on flanges are easy to use in fabricatedapplications.BlindThis flange is used to blank off pipelines,valves andWeld.pumps,it can also be used as an inspection cover.ItPipeis sometimes referred to as a blanking flange.2BlindSocket WeldStud Bolt-This flange is counter bored to accept the pipe beforebeing fillet welded.The bore of the pipe and flange areboth the same therefore giving good flowWeld_characteristics.Socket WeldThreadedThis flange is referred to as either threaded orscrewed.It is used to connect other threadedcomponents in low pressure,non-critical applications.No welding is required.ThreadedLap JointThese flanges are always used with either a stub endhreaded Pipeor taft which is butt welded to the pipe with the flangeloose behind it.This means the stub end or taft alwaysmakes the face.The lap joint is favoured in lowWeldpressure applications because it is easily assembledand aligned.To reduce cost these flanges can beLap Jointsupplied without a hub and/or in treated,coatedStubcarbon steel.EndLap Joint FlangeRing Type JointRingThis is a method of ensuring leak proof flangePconnection at high pressures.A metal ring iscompressed into a hexagonal groove on the face ofthe flange to make the seal.This jointing method canRing Type Jointbe employed on Weld Neck,Slip-on and BlindFlanges.