Condenser tubes ua los ntawmASTM B111 UNS C68700 Cov Lus Qhia, kuj hu uaaluminium tooj dag, muaj qhov tshwj xeeb corrosion tsis kam, yaig tsis kam, thermal conductivity, thiab txhua yam khoom, ua rau lawv zoo tagnrho rau ntau hom kev siv hluav taws xob sib pauv.
UNS C68700 yog ib qho alloy uas muaj npe77.5% tooj liab, 2% aluminium, thiab 20.5% zincnrog ib txoj kab ntawm arsenic (0.04%) ua tus inhibitor. Brass yog qhov tseem ceeb ntawm tooj liab -zinc alloy. Aluminium ntxiv suav nrog ib qho tseem ceeb ntawm cov yeeb yaj kiab corrosion mus rau tooj dag: aluminium oxide, uas ua rau muaj zog tiv thaiv kev cuam tshuam rau hauv kev kub ntxhov siab - nrawm nrawm dej.
Ib kab ntawm arsenic ntxiv rau cov txhuas tooj dag rauinhibit nws susceptibility rau dezincification(cov txheej txheem corrosion uas zinc yog xaiv tau tshem tawm ntawm cov hlau). Yog li ntawd, cov raj ua los ntawm arsenical aluminium brass ASTM B111 UNS C68700 feem ntau siv rau marine condensers thiab cov khoom siv hluav taws xob sib txawv uas cuam tshuam los ntawm siab - dej txias tshaj tawm yuav ua rau muaj teeb meem loj.
Chemical Composition Requirements
| Element | Feem pua |
|---|---|
| Copper (Cu) | 76.0% – 79.0% |
| Aluminium (Al) | 1.8% – 2.5% |
| Hlau (Fe) | Tsawg dua lossis sib npaug li 0.06% |
| Lead (Pb) | Tsawg dua lossis sib npaug li 0.07% |
| Arsenic (As) | 0.02% – 0.06% |
| Zinc (Zn) | Tshuav |
Mechanical Properties
ASTM B111 UNS C68700 seamless raj tau muab tso rau hauvannealed mobnrog temper designationO61:
| Khoom | Tus nqi (ksi) | Tus nqi (MPa) |
|---|---|---|
| Tensile zog | Ntau dua lossis sib npaug li 50 ksi | Ntau dua lossis sib npaug li 345 MPa |
| Yield zog | Ntau dua lossis sib npaug li 18 ksi | Ntau dua lossis sib npaug li 125 MPa |
| Elongation | Ntau dua lossis sib npaug li 55% | Ntau dua lossis sib npaug li 55% |
| Machinability ntsuas | 30% | 30% |
Cov qhab nia sib npaug thoob ntiaj teb
| Txuj | Qib |
|---|---|
| Tuam Tshoj (GB) | HLO 77-2 |
| British Standard (BS) | CZ110 |
| German (DIN) | CuZn20Al2 |
| Japanese (JIS H) | C6870 |
| UNS | C68700 |
Annealing kub:Ci ntsa iab ntawm 425℃- 600℃(800℃F - 1100℃F)
Kev Tshuaj Xyuas & Kev Xeem
| Kuaj / Tshuaj xyuas |
|---|
| Tshuaj ntsuam xyuas |
| Kev tshuaj xyuas qhov muag |
| Qhov ntsuas qhov ntsuas |
| Tensile xeem |
| Kev ntsuam xyuas qhov loj (ASTM E112) |
| Expansion xeem |
| Kev ntsuam xyuas |
| Kev ntsuam xyuas kev ntxhov siab |
| Eddy tam sim no xeem |
| Hydrostatic xeem |
| Pneumatic xeem |
FAQ
Q1: Dab tsi yog qhov txawv ntawm UNS C68700 txhuas tooj dag thiab UNS C12200 tooj liab raj?
A:UNS C68700 txhuas brass muaj 76-79% tooj liab, 1.8-2.5% txhuas, thiab li 20% zinc, ntxiv rau arsenic li inhibitor. Nws yog tsim tshwj xeeb rau kev siv dej hiav txwv thiab kev siv dej siab tshaj plaws vim tias cov txhuas ua cov txheej txheem oxide tiv thaiv. UNS C12200 yog tooj liab ntshiab (99.9%) nrog phosphorus, siv rau cov kav dej tshiab. C68700 resists impingement nres thiab dezincification ntau zoo dua C12200 nyob rau hauv marine ib puag ncig.
Q2: Dab tsi yog dezincification hauv UNS C68700 txhuas tooj dag raj?
A:Dezincification yog txheej txheem corrosion uas zinc xaiv tau tshem tawm ntawm cov tooj dag, tawm hauv qab ntxeem tau, tsis muaj tooj liab. Qhov no ua rau lub raj xau thiab tsis ua haujlwm. UNS C68700 muaj 0.02-0.06% arsenic, uas inhibits dezincification. Yog tsis muaj arsenic (xws li hauv cov tooj dag uas tsis yog arsenical), lub raj yuav ua tsis tiav hauv lub hlis hauv cov dej txhoj puab heev. Qhov sib ntxiv ntawm arsenic yog vim li cas C68700 hu ua "arsenical aluminium brass."
Q3: Qhov twg yog ASTM B111 UNS C68700 raj feem ntau siv?
A:UNS C68700 raj yog siv rau marine condensers, fais fab nroj tsuag tshav kub exchangers, desalination nroj tsuag, thiab cua txias tshuab siv seawater los yog dej brackish. Lawv yog qhov zoo tagnrho rau cov ntawv thov uas qhov dej txias tshaj tawm siab (6-10 ft/s) thiab kev cuam tshuam kev cuam tshuam yog kev txhawj xeeb. Feem ntau hauv cov nkoj, cov chaw tsim hluav taws xob ntug dej hiav txwv, thiab cov tshuab ua kom txias txias. Rau cov dej tshiab los yog kev pabcuam qis qis, tus qauv tooj liab lossis tus qhuas qhuas tooj dag tuaj yeem txaus.
Q4: Qhov txawv ntawm UNS C68700 thiab UNS C70600 (tooj liab-nickel) yog dab tsi?
A:UNS C68700 (txhuas tooj dag) raug nqi tsawg dua UNS C70600 (90/10 tooj liab-nickel). C68700 muaj kev tiv thaiv zoo rau impingement nres tab sis muaj kev cuam tshuam rau ammonia corrosion. C70600 muaj kev tiv thaiv zoo rau ammonia, kev tiv thaiv corrosion ntau dua, thiab kev ua haujlwm zoo dua hauv dej hiav txwv. Rau cov dej hiav txwv huv nrog lub nrawm nrawm, C68700 yog tus nqi - xaiv tau zoo. Rau cov dej qias neeg lossis tsis ruaj khov nrog sulfides, C70600 nyiam dua.
Q5: Dab tsi yog temper O61 rau UNS C68700 txhuas tooj dag raj?
A:O61 yog ib qho annealed temper designation rau ASTM B111 raj. Nws txhais tau hais tias lub raj tau raug cua sov thiab maj mam txias kom tsim tau ib qho muag muag, zas xim. Rau C68700 O61, tensile lub zog yog yam tsawg kawg nkaus 345 MPa thiab elongation yog yam tsawg kawg nkaus 55%. Qhov kev npau taws no tso cai rau lub raj kom nthuav dav thiab cog lus nrog thermal cycling yam tsis muaj kev tawg. O61 yog tus qauv temper rau cov cua kub exchanger raj.
Q6: Cov raj UNS C68700 puas tuaj yeem siv nrog ammonia- raws li cov kua dej txias?
A:Tsis yog. UNS C68700 aluminium brass yog raug rau kev nyuaj siab corrosion cracking nyob rau hauv lub xub ntiag ntawm ammonia los yog ammonium tebchaw. Txawm tias me me ntawm ammonia (los ntawm kev loj hlob lom neeg los yog tshuaj ntxuav) tuaj yeem ua rau tawg. Rau kev pabcuam ammonia, siv tooj liab-nickel alloys (C70600, C71500) lossis stainless hlau. Tsis txhob siv C68700 hauv cov nroj tsuag chiv lossis tub yees siv ammonia.
Q7: Dab tsi yog qhov dej siab tshaj plaws rau ASTM B111 C68700 raj?
A:UNS C68700 cov raj tuaj yeem tiv taus cov dej nrawm txog 8-10 ko taw ib pliag (2.4-3.0 m/s) ntawm sab raj yam tsis muaj qhov cuam tshuam loj heev. Qhov no yog ntau dua li 3-4 ft / s txwv rau cov tooj liab dawb lossis tooj liab qhuas. Aluminium nyob rau hauv lub alloy tsim ib tug tawv, adherent oxide txheej uas resists mechanical yaig. Rau velocities saum 10 ft / s, tooj liab-nickel alloys raug pom zoo.
Q8: Dab tsi yog qhov sib npaug thoob ntiaj teb ntawm UNS C68700 txhuas tooj dag raj?
A:UNS C68700 muaj ntau qhov sib npaug thoob ntiaj teb: Tuam Tshoj GB tus qauv hu nws HAL77-2; British Standard hu nws CZ110; German DIN hu nws CuZn20Al2; Japanese JIS H hu nws C6870. Tag nrho cov no yog arsenical txhuas tooj dag nrog tib lub npe muaj pes tsawg leeg (76-79% Cu, 1.8-2.5% Al, tshuav Zn, ntxiv rau arsenic). Lawv yog interchangeable rau kev siv tshav kub exchanger.
Q9: Vim li cas txhuas ntxiv rau UNS C68700 tooj dag raj?
A:Aluminium (1.8-2.5%) yog ntxiv los ua ib qho kev tiv thaiv aluminium oxide zaj duab xis ntawm lub raj nplaim. Cov oxide zaj duab xis no nyuaj heev, ua raws, thiab tus kheej - kho. Nws tiv thaiv lub raj los ntawm impingement nres (kev yaig-corrosion) tshwm sim los ntawm cov dej nrawm nrawm, npuas, lossis cov khoom raug tshem tawm. Yog tsis muaj txhuas, tus qauv tooj dag yuav erode sai sai nyob rau hauv turbulent seawater. Cov oxide zaj duab xis kuj txhim kho kev tiv thaiv corrosion hauv ntau qhov chaw.
Q10: Yuav tsum tau kuaj dab tsi rau ASTM B111 UNS C68700 raj?
A:ASTM B111 yuav tsum muaj tshuaj ntsuam xyuas (los xyuas Cu, Al, As, Zn), tensile test (min 345 MPa UTS), expansion test (ductility), flattening test, grain size test (ASTM E112), residual stress test (rau cracking susceptibility), and eddy current or hydrostatic test for to leaks. GNEE muab cov ntawv xeem ntawv pov thawj rau txhua qhov kev xeem uas xav tau rau txhua lub raj ntau.
Q11: Puas yog UNS C68700 cov raj tuaj yeem welded lossis brazed?
A:UNS C68700 tuaj yeem ua brazed tab sis tsis pom zoo rau fusion vuam. Cov ntsiab lus zinc (kwv yees li 20%) vaporizes ntawm vuam kub, tsim porosity thiab tsis muaj zog ntawm kev sib koom tes. Rau raj - mus rau -tubesheet pob qij txha hauv cov khoom siv hluav taws xob, dov thiab nthuav dav yog txoj hauv kev. Brazing nrog nyiaj -raws li cov hlau yog ua tau nrog ceev faj tswj kub. Rau cov welded los ua ke, siv tsawg-zinc tooj dag lossis tooj liab{10}}nickel hloov.
Q12: Dab tsi yog qhov machinability ntsuam xyuas ntawm UNS C68700 txhuas tooj dag raj?
A:UNS C68700 muaj qhov ua tau zoo ntawm 30% (piv rau dawb- txiav tooj dag C36000 ntawm 100%). Qhov no txhais tau hais tias nws yog ib qho nyuaj rau tshuab vim tias cov khoom yog ductile thiab nyhav smear ntau dua li daim ntawv chips. Rau lub raj kawg tiav thiab tig ntsej muag, cov cuab yeej ntse nrog cov kaum sab xis zoo yog xav tau. Qhov no tsis tshua muaj machinability yog siv tau vim hais tias cov raj feem ntau dov rau hauv tubesheets ntau dua li cov tshuab hnyav.
Yuav Ua Li Cas Peb Ntim Copper Heat Exchanger Tubes rau Kev xa khoom thoob ntiaj teb?
Kev ntim khoom tsis zoo ua rau puas tsuaj txawm tias qhov zoo tshaj plaws tooj liab kub exchanger raj. Raws li ib tug kws tshaj lij tooj liab kub exchanger tube Hoobkas ua hauj lwm tooj liab kub exchanger tube teb chaws USA, Europe, UAE, Saudi Arabia, thiab Is Nrias teb, peb ua raws li tub rog - qib export ntim cov qauv kom tsis muaj kev puas tsuaj thaum lub sij hawm hiav txwv los yog huab cua freight.
Peb Cov Txheej Txheem Ntim Txheej Txheem:
| Ntim Theem | Khoom siv / txoj kev | Lub hom phiaj |
|---|---|---|
| Ib leeg Tube tiv thaiv | Anti-xeb VCI ntawv + yas kawg kaus mom | Tiv thaiv kom tsis txhob ya raws, plua plav, thiab khawb ntawm tooj liab tube kub exchanger sab hauv. |
| Bundling | Nylon straps + ntoo spacers | Khaws tooj liab kub exchanger tube OD 19mm, 1 nti, los yog 5/8 nti qhov ntau thiab tsawg tau teeb tsa thiab kev co-dawb. |
| Moisture Barrier | Thick PE zaj duab xis qhwv (kub-shrink) | Thaiv cov av noo thaum lub sij hawm ntev hiav txwv voyages rau tooj liab kub exchanger raj lub teb chaws Yelemees los yog Saudi Arabia. |
| Ntim Ntim | Export-qib plywood case lossis steel-banded ntoo crates | Withstands stacking thiab ntxhib tuav. Txhua lub crate sau nrog PO tooj, alloy (xws li, SB111 C70600), thiab kom muaj nuj nqis. |
| Cov ntaub ntawv | Cov npe ntim + Daim Ntawv Pov Thawj Zeb Xeem (MTC) txuas sab nraud | Kev lis kev cai clearance txhawb rau tooj liab kub exchanger raj stockist thiab distributor koom tes. |
Rau U-Bundle Orders:U tube heat exchanger thiab U tube bundle heat exchanger yog muab tso rau hauv siab steel jigs hauv lub crate los tiv thaiv bending radius distortion.
Peb lub Hoobkas & Khoom siv
| Hom khoom siv | Specification / Muaj peev xwm | Kev cuam tshuam zoo |
|---|---|---|
| Kab rov tav nruam Casting kab | 10-tuj muaj peev xwm | Ua homogeneous tooj liab alloy raj rau tshav kub exchanger billets nrog xoom porosity. |
| Peb -Roll Piercing Mill | Txog li 60mm OD | Precision phab ntsa thickness tswj rau tshav kub exchanger raj phab ntsa thickness tsawg li 0.5 hli. |
| Txias Drawing Bench | 5 kos ua ke | Ua tiav nruj tolerances ntawm tooj liab kub exchanger raj ntev thiab tshav kub exchanger yeeb nkab txoj kab uas hla. |
| Straightening & Txiav Kab | CNC servo- tswj | Burr- txiav dawb rau tooj liab kub exchanger tube 3/4 nti thiab 1 nti kom ntev qhov project. |
| U-Bending Tshuab | CNC mandrel hom | Ua U tube condenser thiab U tube bundle heat exchanger yam tsis muaj kinking lossis ovality. |
| Eddy Tam sim no Tester | NDT (Tsis yog -Kev kuaj kev puas tsuaj) | 100% kev soj ntsuam ntawm C70600 raj thiab C71500 raj rau pinholes los yog tawg ib ASTM B111 pdf qauv. |
| Hydrostatic Tester | Txog li 200 bar | Validates tshav kub exchanger raj expansion thiab raj dov kev ncaj ncees. |
| Spectrometer | Optical emission (OES) | Pom zoo cov tshuaj muaj pes tsawg leeg ntawm ASME SB111, EN 12451, thiab JIS H3300 qib ntawm txhua pawg. |
Peb Cov Ntawv Pov Thawj & Ua Tau Zoo:
ASTM B111 pdf thiab ASME SB111 pdf tag nrho traceability.
ISO 9001: 2015 Kev tswj hwm kev ua haujlwm zoo.
Thib peb- tog neeg soj ntsuam txais: SGS, BV, Lloyds, los yog TUV.
Copper heat exchanger tube life expectancy test reports muaj raws li qhov kev thov.
Tau Txais Cov Lus Qhia Ceev & Logistics Plan
