en.geldbachshanxi.comFlange,Pipe fittings,Forgings_M.GELDBACH(SHANXI)FLANGE & FITTINGS CO.,LTD

Flange,Pipe fittings,Forgings_M.GELDBACH(SHANXI)FLANGE & FITTINGS CO.,LTD 中文简体 English   4 3 2 1  关于我们 M.Geldbach (Shanxi) Flange & Fittings Co., Ltd. is a German-Chinese Joint Venture, located at the well-known of FORGING TOWN OF CHINA” in Dingxiang County. Shanxi province, which is only about 120 kilometers away from the capital of Shanxi Province-Taiyuan city. It covers the land of about 35,000.00 square meters and 25,000 square meters in building. The whole completed production line has been well in practice, such as raw material cutting, die and ring rolling forging, heat treatment, maching, testing, inspection, marking and coating etc. all together about 60 equipments have been manipulated by our well-experienced staff whom are having a very good knowledge of our products. MORE PRODUCTS SHOW 产品展示 Flange Pipe fittings Forgings 工程案例 Tube Sheet Number of views : 1028 Keywords : Blind Number of views : 1029 Keywords : BUND Number of views : 1030 Keywords : Nozzle Flange Number of views : 1026 Keywords : NEWS CENTER 新闻中心 Category brief summary: 新闻资讯 Four quality inspection aspects of elbow weldingFour quality inspection aspects of elbow welding Time of issue : 2019-03-18 20:07:00 Time of issue : 1552910820000visualinspection:generallybasedonthenakedeyeobservation,sometimeswitha5-20timesmagnifyingglassforobservation.Throughvisualinspection,surfacedefectsofweldelbowwelds,suchasundercuts,welds,surfacecracks,pores,slaginclusionsandweldpenetration,canbefound.Thedimensionsoftheweldcanalsobemeasuredusingawelddetectorortemplate. 2.Non-destructivetesting:Inspectionofdefectssuchasslaginclusions,poresandcrackshiddeninsidetheweld.Atpresent,themostcommonuseisX-rayinspection,aswellasultrasonicflawdetectionandmagneticflawdetection.TheX-rayinspectionusesX-raystotakepicturesoftheweld,andjudgeswhethertherearedefects,thenumberandtypeofdefectsintheinteriorbasedontheimageofthefilm.Accordingtothetechnicalrequirementsoftheproduct,theweldisqualified.Thebasicprincipleofultrasonicflawdetectionisshowninthefigurebelow.Theultrasonicbeamisdetectedbythehairandtransmittedtothemetal.Whentheultrasonicbeamistransmittedtotheinterfacebetweenthemetalandtheair,itisrefractedandpassedthroughtheweld.Ifthereisadefectintheweld,theultrasonicbeamisreflectedtotheprobeandaccepted,andareflectedwaveappearsonthescreen.Basedonthecomparisonanddiscriminationofthesereflectedwaveswithnormalwaves,thesizeandpositionofthedefectscanbedetermined.UltrasonicflawdetectionismuchsimplerthanX-rayphotographyandisthereforewidelyused.However,ultrasonicflawdetectionoftenonlymakesjudgmentsbasedonoperationalexperience,anditcannotleaveatestbasis.Forinternaldefectsthatarenotdeepfromthesurfaceoftheweldandextremelysmallcracksonthesurface,magneticflawdetectioncanalsobeused. 3.Hydrostatictestandairpressuretest:Forpressurizedcontainersrequiringsealing,hydrostatictestand/orairpressuretestshallbecarriedouttocheckthesealingandpressurebearingcapacityoftheweld.Themethodistoinject1.25-1.5timesworkingwateroraworkingpressure(mostlyair)intothecontainerforacertainperiodoftime,andthenobservethepressuredropinthecontainer,andobservewhetherthereisleakageoutside.Accordingtothese,itcanbeassessedwhethertheweldisqualified. 4,themechanicalperformancetestoftheelbow:non-destructivetestingcanfindtheinherentdefectsoftheweld,butcannotexplainthemechanicalpropertiesofthemetalintheheataffectedzoneoftheweld,sosometimestheweldedjointshouldbesubjectedtotensile,impact,bendingandothertests.Thesetestswereperformedbythetestpanels.Thetestpanelsusedarepreferablyweldedtogetherwiththelongitudinaljointsofthecylindertoensureconsistentconstructionconditions.Thetestpanelswerethentestedformechanicalproperties.Inactualproduction,onlytheweldedjointsofthenewsteelgradesaregenerallytestedinthisrespect. See more information visualinspection:generallybasedonthenakedeyeobservation,sometimeswitha5-20timesmagnifyingglassforobservation.Throughvisualinspection,surfacedefectsofweldelbowwelds,suchasundercuts,welds,surfacecracks,pores,slaginclusionsandweldpenetration,canbefound.Thedimensionsoftheweldcanalsobemeasuredusingawelddetectorortemplate. 2.Non-destructivetesting:Inspectionofdefectssuchasslaginclusions,poresandcrackshiddeninsidetheweld.Atpresent,themostcommonuseisX-rayinspection,aswellasultrasonicflawdetectionandmagneticflawdetection.TheX-rayinspectionusesX-raystotakepicturesoftheweld,andjudgeswhethertherearedefects,thenumberandtypeofdefectsintheinteriorbasedontheimageofthefilm.Accordingtothetechnicalrequirementsoftheproduct,theweldisqualified.Thebasicprincipleofultrasonicflawdetectionisshowninthefigurebelow.Theultrasonicbeamisdetectedbythehairandtransmittedtothemetal.Whentheultrasonicbeamistransmittedtotheinterfacebetweenthemetalandtheair,itisrefractedandpassedthroughtheweld.Ifthereisadefectintheweld,theultrasonicbeamisreflectedtotheprobeandaccepted,andareflectedwaveappearsonthescreen.Basedonthecomparisonanddiscriminationofthesereflectedwaveswithnormalwaves,thesizeandpositionofthedefectscanbedetermined.UltrasonicflawdetectionismuchsimplerthanX-rayphotographyandisthereforewidelyused.However,ultrasonicflawdetectionoftenonlymakesjudgmentsbasedonoperationalexperience,anditcannotleaveatestbasis.Forinternaldefectsthatarenotdeepfromthesurfaceoftheweldandextremelysmallcracksonthesurface,magneticflawdetectioncanalsobeused. 3.Hydrostatictestandairpressuretest:Forpressurizedcontainersrequiringsealing,hydrostatictestand/orairpressuretestshallbecarriedouttocheckthesealingandpressurebearingcapacityoftheweld.Themethodistoinject1.25-1.5timesworkingwateroraworkingpressure(mostlyair)intothecontainerforacertainperiodoftime,andthenobservethepressuredropinthecontainer,andobservewhetherthereisleakageoutside.Accordingtothese,itcanbeassessedwhethertheweldisqualified. 4,themechanicalperformancetestoftheelbow:non-destructivetestingcanfindtheinherentdefectsoftheweld,butcannotexplainthemechanicalpropertiesofthemetalintheheataffectedzoneoftheweld,sosometimestheweldedjointshouldbesubjectedtotensile,impact,bendingandothertests.Thesetestswereperformedbythetestpanels.Thetestpanelsusedarepreferablyweldedtogetherwiththelongitudinaljointsofthecylindertoensureconsistentconstructionconditions.Thetestpanelswerethentestedformechanicalproperties.Inactualproduction,onlytheweldedjointsofthenewsteelgradesaregenerallytestedinthisrespect. Categories ：News Author ： Origin ： Forging process of butt flangeForging process of butt flange Time of issue : 2019-03-18 20:07:00 Time of issue : 1552910820000Whatisabuttweldflange?Buttweldingflangesincludelongneckbuttweldflanges,flangeswithneckbuttwelds,neckweldflanges,etc.Itismainlysuitableforthebuttweldingofflangesandpipes.ItsstructureisreasonableanditsstrengthisIthashighrigidity,canwithstandhightemperature,highpressureandrepeatedbendingandtemperaturefluctuation;anditssealingperformanceisreliable.Thebuttweldingflangewithnominalpressureof0.25~2.5MPaadoptsconcaveandconvexsealingsurface. Ingeneral,abuttweldflangeisaflangewithaneckthathasatransitionofaroundtubeandisbuttweldedtothetube.Buttweldingflangeisoneoftheflangedpipefittings.Itiswidelyusedandpopularizedindifferentfieldsandindustries.Ithasdifferentscopesforuseinuse,andtheenvironmenttobeusedisdifferent.Itneedstobeusedaccordingtocertainconditions.. Theweldedflangeissuitableforsteelpipeconnectionswithanominalpressurenotexceeding2.5MPa.Itplaysanimportantroleandvalueinthelinkofthepipe,butthenominalpressuremustbeguaranteedtobewithinacertainrange.Thesealingsurfaceoftheweldingflangecanbemadeintothreetypes:smooth,concave-convexandgrooved.Thesmooth-typebutt-weldingflangeisthemostwidelyused,especiallywhenthemediumconditionismoderate,suchaslow-pressurenon-purifiedcompressedair.Lowpressurecirculatingwater,itsadvantageisthatthepriceisrelativelycheap.Buttweldflangesaresuitableforpipelineswithhighpressureortemperaturefluctuationsorforhightemperature,highpressureandlowtemperaturepipelines,aswellasforpipelinesthatareexpensive,flammableandexplosive....