Features :# 'U' bending is done by cold working process.# 'U' bending is done to the required radius as per customer drawings.# The bend portion and six inch leg is stress relieved by resistance heating.# Inert gas (Argon) is passed through it at the required flow rate to avoid oxidation in ID.# The radius is checked for its OD and wall thinning with the recommended specification.# The physical properties and micro-structure is checked at three different position.# Visual inspection for waviness and cracks is done with Dye Penetrant Test.# Each tube is then hydro tested at the recommended pressure to check for leakage.# Cotton ball test is done to check the ID cleanliness of the tube.# Thereafter pickled, dried, marked and packed.# All procedure is strictly followed as per TEMA "C" and ASTM A-688.Stainless Steel U Bend Tube ASTM B163, ASME SA 213, ASME SB 163, EN10216-5 TC2 D4U-BendTubearewidelyusedinHeatExchangerSystems.Heat-ExchangerEquipmentonthebasisofSeamlessStainlessU-TubesandWeldedStainlessUbendTubeisessentialinstrategicallyimportantandcriticalfelds---NuclearAndPetrochemicalMachineBuilding.XINZHOUGroupStarttoProduceUBendingTubeSince2006,Uptonowalreadysupplymorethan30000tonsStainlessSteelUBendTubeto35countries.TheU-BendTubeComplyWithTheFollowingStandards:1.ASTMA688/ASMESA6882.ASTMA803/ASMESA8033.ASTMA556/ASMESA556SteelGrade:----Ferrite|Austenite|Duplex|SuperDuplex|Ni-Alloys|Titanium|TP410TP405S44400S44660TP430|TP304/304LTP316/316LTP316TiTP317/317LTP321TP347|S31803S32205S32304|S32750S32760|N06600N08020N00880N08825N08904|Gr.2|----TubeOfOtherAlloysAndSteelGradesCanBeProducedUponAgreement.TechnicalRequirements:StraightTubes Standard Specification ForBending:ASMESA213;ASMESB163;ASMEA789,ASMESA268,ASMESA269,etc.Marking:BeforeBendingByMarkingMachineAllOverTheTubeLength(BentSectionAfterHeatTreatmentWithoutMarking)Note:MarkingisalsopossibleAfterBendingOnTheStraightPartsOfU-BendingTube.U-BendTubes:-TEMARCB2.31StandardOfTheTubularExchangerManufacturersAssociation(9thEdition).-ASTMA688/ASMESA688StandardSpecificationForWeldedTubesOfAusteniticCorrosionResistantSteelGradeDesignedForFeedWaterBoilers.-ASTMB163/ASMESA163StandardTechinicalRequirementsForTubesOfNickelAndNickelAlloyForCondensersAndHeatExchangers.-CustomerSpecifications.BendingRadius:From1.5*OD(OutsideDiameter)To1500mmWhenOrderingTubesWithRadiuslessorequalto1.5*OD,ItIsNecessaryToAgreePrecisionOfGeometrics.StraightTubesMaximumLength:(BeforeBending):35000mm.LegLength:Min1Meter,Max.16500mm(ForMaxR=1500mm)Note:OtherSizeAreAvailableUponAgreement.HeatTreatment:StressRelievedAfterU-Bending(BendingAreaPlus300MMForEachLeg).HydrostaticTestAfterUBending:MaximumTestPressure600Bar,Soaking10Sec.WithDematerializedWater.CompressedAirCleaningAfterHydro-Test.Packaging:InStrongTransport-WorthyPre-fumigatedwooden boxesofcorrespondingdimensionsforeachtubeLength,Radius,Diameter,AccordingToPO requirements aswellas wrappedIn polyethylenefilmsWith soft plastic caps on both endofTube.
