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Processing informationThe tube system for high-pressure applications
Inairconditioning/refrigeration,andinparticularintheareaofcommercialorindustrialrefrigerationsystems,moreandmoreecology-orientedconceptsarebeingimplemented,withthefocusbeingonefficiencyandenvironmentallyfriendlyrefrigerants.
The use of the natural refrigerant CO2 (R744)leadstohigheroperatingpressures,particularlyintranscriticaloperation.ThenewK65system,consistingoftubesandfittings, isparticularlysuitedtotheseapplications.
K65isahigh-strengthcopperalloyandenablessimple,safeandeconomical installationof refrigerationsystemswithoperationpressuresofupto120bar(otherpressure levelsonrequest).
BoththetubesandthefittingsoftheK65systemareTÜV-certifiedand,therefore,meettherequirementsoftheEuropeanPressureEquipmentDirective97/23/EC.
K65tubesandK65fittingsareclearlymarked,sothatthesystemcomponentscanbeeasilyidentifiedatalltimes.
Your benefits of using K65:
•Cost reduction and improved handling due to weight reduction•Excellentheattransfercharacteristics•Knownanduser friendlyprocessing technologies (e.g. brazing)•Existingprocessesandequipmentcanbeused•Clearidentificationofthesystemcomponents•TÜV-certified
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Applications
•Airconditioningandrefrigeration,heating,non-hazardous refrigerants,inparticulartherefrigerantCO2(R744).
•Furthermediaarepossibleafterconsultationwiththe manufacturer.
Material properties
Material designation CompositionK65,CW107C, Fe2.10–2.60%CuFe2P Zn0.05–0.20%UNSC19400 P0.015–0.15% Pbmax.0.03% CubalanceStandardsEN CuFe2P(EN12449) CW107CVdTÜV MaterialSheet567UNS* C19400* Unified Numbering System (USA)
Temper*K65tubes=R300,accordingtoEN12449andVdTÜV567(heattreated)and/orR420accordingtoEN12449(hardasdrawn)* The temper for K65 fittings is above the value R300 due to work-
hardening during manufacturing process.
Corrosion resistanceK65is insensitivetostresscorrosioncrackingandexhibitshighresistancetonaturalatmosphere.
Physical properties* Thermalconductivity >260W/(mK)Density 8.91g/cm3
Coefficientofthermalexpansion 17.6·10-6/K* Reference values at room temperature
K65isslightlymagneticandcaneasilybedistinguishedfromothercoppermaterials(e.g.Cu-DHP)bymeansofaneody-miummagnet–ahelpful,practicaladvantage.
Processing
Proven joining technology – brazing!K65hasexcellentprocessingpropertieswhicharesimilartothoseofpurecopper.K65tubesmaybejoinedwithK65fit-tingsthroughbrazing.K65fittingsaremanufacturedbyIBPConex/Bänninger.
Silver-containingsolderswithasilvercontentofmin.2%haveprovedtobeverysuccessful.Usually,nofluxisnecessaryforthebrazingofK65tubeandK65fittingandtheuseofsilver-containingCuPsolders.Forthejoiningofcopperalloyssuchasbrasstheadditionaluseoffluxes,e.g.FH10accordingtoDINEN1045,isrecommen-ded.Thisensuresoptimumfillingofthecapillarygap.Residualfluxhastoberemovedafterbrazing(e.g.withamoistcloth).
Theprocessinginstructionsfortheinstallationoftubesandconnectingtubesmadeofcopper,e.g.,accordingtoEN378andDKIinformationi164*,commonforairconditioningandrefrigeration,havetobefollowed.Inaddition,compliancewiththebasicrequirementsoftheEuropeanPressureEquipmentDirective97/23/EChastobeexaminedinindividualcases.Thesafetyprecautionsofhigh-pressuresystems,particularlyforpressuretestingandcommissioninghavetobeobserved,ifnecessarybycallinginexperts.
* i164, Copper tubes in air conditioning and refrigeration for techni-
cal and medical gases
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Duringbrazing,itisimperativethatthebrazedjointishandledandheatedproperly.Additionalheatingandannealingofthetubesandthefittingbodyarenotpermitted.
Joining properties of K65Brazing excellentSoftsoldering excellentInertgaswelding excellentResistancewelding goodLaserwelding good
Solder according to DIN EN ISO 17672
Operating tempera-ture °C
Composition in per cent by weight
Ag Cu Zn Sn P
CuP279 740 2 91.7 – – 6.3
CuP281 710 5 89 – – 6.0
CuP284 700 15 80 – – 5.0
Ag244 730 44 30 26 – –
Ag134 710 34 36 27.5 2.5 –
Ag145 670 45 27 25.5 2.5 –
Wieland K65 tube for max. 120 bar
Outside diameter Wall thickness Wieland
material No.
Small bundle Ballot
Temper
Minimum bending radius
Zoll mm mm Number of tubes of 5 m each
Metres per small bundle
Small bundles per ballot
Metres per ballot mm
3/8" 9.52 0.65 433009520 10 50 20 1,000 R420 43
1/2" 12.70 0.85 433012700 10 50 20 1,000 R420 52
5/8" 15.87 1.05 433015870 10 50 20 1,000 R300 63
3/4" 19.05 1.30 433019060 10 50 20 1,000 R300 75
7/8" 22.23 1.50 433022230 10 50 10 500 R300 98
11/8" 28.57 1.90 433028510 5 25 20 500 R300 115
13/8" 34.92 2.30 433034920 5 25 10 250 R300 –*
15/8" 41.27 2.70 433041270 3 15 10 250 R300 –*
Flux DIN EN1045
Tem-perature°C
Note
FH10 550–970 Thefluxesarecorrosiveandhavetoberemoved.
Selection of recommended solders
IncompliancewiththerequirementsoftheAD2000rulesandtheVdTÜVMaterialDataSheet567thefollowingdimensi-onsareavailablefromstockforoperatingpressuresofupto120bar.
Thedimensionsmentionedherecanbecoldbentwithsui-tablebendingequipmentandbendingsegmentsthatarepreciselytailoredtotheoutsidediameter.Hotbendingisnotrecommended.
Additionaldimensionsandformsofdelivery(e.g.level-woundtubes)arepossiblefor industrialapplicationsaccordingtothecustomer’sspecificationandforotherpressuresaswell.
Tubes in K65
Identification: WielandK65120barDimensionaltolerances: accordingtoEN12735-1Material: WielandK65Temper: R300(heattreated) R420(hardasdrawn)Maximumoperatingpressure: 120bar(respectivedimensionssee table)Certification: accordingtoVdTÜVMaterialData Sheet567Tubeends: closedPacking: insmallbundlesandballots
Recommended fluxes
Indifficult-to-reach joints,as theymayoccur incomplexassemblies, theuseofphosphorus-freebrazingsolderswithhighersilvercontent,suchasAg134orAg145,usingfluxesisrecommended.Thesesoldersarecharacterisedbyahighergap-fillinglevel.
* No standard bending radii defined
Changes in surface colour are possible with this material but have no impact on technical properties.
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Fittings in K65
Designation of the fittingThefittingisdesignatedby• shape(e.g.bend,elbow,T-piece,coupling)• itemnumber• dimension
Inyourorder,pleasestateatleast:•itemnumber•dimension•numberofunits
Equal fittingswhoseoutletsallhavethesameconnectiondimensionaresufficientlydesignatedbythisonedimension,e.g.K51303/4''–3/4''–3/4''=K51303/4''
Reduced fittings aredesignatedbytheoutletswiththerespectiveconnectiondimensionasfollows:
Startwiththelargerdimension;forT-piecesandreducerswiththelargersurfaceofthelargerdimensionofthepassage.
Pleasestatetheoutletswiththerespectivetubeoutsidediameter inthefollowingorder:
Designationofafittingwith2outlets,e.g.red.nippleK52433/4''–1/2''e.g.bendK50023/4''
DesignationofT-piecese.g.TK51303/4''–3/4''–5/8''
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Dimension L1 L2 L3 Z1 Z2 Z3 Item number
3/8" 20.0 22.0 12.0 K5001003000000
1/2" 25.5 27.5 16.0 K5001004000000
5/8" 31.5 33.5 20.0 K5001005000000
3/4" 37.5 39.5 24.0 K5001006000000
7/8" 44.5 46.5 28.0 K5001007000000
11/8" 52.5 54.5 36.0 K5001009000000
13/8" 65.0 67.0 44.0 K5001011000000
15/8" 73.0 75.0 52.0 K5001013000000
Dimension L1 L2 L3 Z1 Z2 Z3 Item number
3/8" 22.0 14.0 K5002003000000
1/2" 27.5 18.0 K5002004000000
5/8" 33.5 22.0 K5002005000000
3/4" 39.5 26.0 K5002006000000
7/8" 43.5 27.0 K5002007000000
11/8" 54.5 38.0 K5002009000000
13/8" 67.5 46.0 K5002011000000
15/8" 75.5 54.0 K5002013000000
Dimension L1 L2 L3 Z1 Z2 Z3 Item number
3/8" 14.5 14.5 6.5 6.5 K5130003003003
1/2" 18.0 18.0 8.5 8.5 K5130004004004
5/8" 22.0 22.0 10.5 10.5 K5130005005005
3/4" 26.0 26.0 12.5 12.5 K5130006006006
7/8" 30.5 30.5 14.0 14.0 K5130007007007
11/8" 34.0 34.0 17.5 17.5 K5130009009009
13/8" 42.0 42.0 21.0 21.0 K5130011011011
15/8" 46.0 46.0 25.0 25.0 K5130013013013
Dimension L1 L2 L3 Z1 Z2 Z3 Item number
3/4" 21.5 37.5 8.0 K5040006000000
7/8" 25.5 27.5 9.0 K5040007000000
11/8" 28.0 31.0 12.0 K5040009000000
13/8" 38.0 43.0 17.0 K5040011000000
15/8" 39.0 51.0 18.0 K5040013000000
Dimension L1 L2 L3 Z1 Z2 Z3 Item number
3/4" 21.5 8.0 K5041006000000
7/8" 25.0 16.5 K5041007000000
11/8" 27.0 10.5 K5041009000000
13/8" 39.0 18.0 K5041011000000
15/8" 43.0 22.0 K5041013000000
K5001Bend90°I/A
K5002Bend90°
K5040Bend45°I/A
K5041Bend45°
K5130Tee
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Dimension L1 L2 L3 Z1 Z2 Z3 Item number
1/2–3/8–3/8" K5130004003003
1/2–1/2–3/8" 18.0 18.0 18.0 8.5 8.5 10.0 K5130004004003
5/8–5/8–1/2" 22.0 22.0 21.0 10.5 10.5 11.5 K5130004005004
5/8–1/2–1/2" 21.0 20.0 9.5 10.5 K5130005004004
5/8–5/8–3/8" 22.0 22.0 21.0 10.5 10.5 13.0 K5130005005003
3/4–3/4–5/8" 26.0 26.0 25.0 12.5 12.5 13.5 K5130006006005
7/8–7/8–3/4" 31.0 31.0 28.0 14.5 14.5 14.5 K5130007007006
11/8–11/8–5/8" 34.0 34.0 33.0 17.5 17.5 16.5 K5130009009007
13/8–13/8–7/8" 42.0 42.0 45.0 21.5 21.0 28.5 K5130011011007
15/8–15/8–13/8" 46.0 46.0 45.0 25.5 25.0 24.0 K5130013013011
Dimension L1 L2 L3 Z1 Z2 Z3 Item number
1/2–3/8" 25.0 7.5 K5243004003000
5/8–1/2" 28.5 7.5 K5243005004000
5/8–3/8" 29.0 9.5 K5243005003000
3/4–5/8" 32.0 7.0 K5243006005000
3/4–1/2" 32.0 9.0 K5243006004000
3/4–3/8" 35.0 13.5 K5243006003000
7/8–3/4" 38.0 8.0 K5243007006000
7/8–3/8" 46.0 21.5 K5243007003000
7/8–5/8" 38.5 10.5 K5243007005000
11/8–7/8" 43.5 10.5 K5243009007000
13/8–7/8" 43.0 13.0 K5243009006000
11/8–5/8" 46.0 18.0 K5243009005000
13/8–11/8" 48.0 10.5 K5243011009000
13/8–13/8" 52.5 10.5 K5243013011000
Dimension L1 L2 L3 Z1 Z2 Z3 Item number
3/8" 23.0 7.0 K5270003000000
1/2" 27.0 8.0 K5270004000000
5/8" 32.0 9.0 K5270005000000
3/4" 37.0 10.0 K5270006000000
7/8" 43.0 10.0 K5270007000000
11/8" 45.0 12.0 K5270009000000
13/8" 56.0 14.0 K5270011000000
15/8" 57.0 15.0 K5270013000000
Dimension L1 L2 L3 Z1 Z2 Z3 Item number
1/2" 12.6 3.1 K5301004000000
5/8" 14.9 3.4 K5301005000000
3/4" 18.7 5.2 K5301006000000
7/8" 22.5 6 K5301007000000
11/8" 23.6 7.1 K5301009000000
13/8" 29.3 8.3 K5301011000000
15/8" 30.4 9.4 K5301013000000
K5130Reductiontee
K5243Reductioncoupling
K5270Straightcoupling
K5301Endcap
Thisbrochureisforyourgeneralinformationonlyandisnotsubjecttorevision.Noclaimscanbederivedfromitunlessthereisevidenceofintentorgrossnegligence.Thedatapresentedisnotguaranteedanddoesnotreplaceexpertadvice.
0541-0449
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