Thaum muab cov raj rau cov khoom siv hluav taws xob, cov condensers, lossis cov tshuab cua txias, ob qho kev xaiv hauv qabASTM B111txheem yogC68700(Arsenical Aluminium Brass) thiabC12200Phosphorized tooj liab.Xaiv lub raj tsis ncaj ncees lawm tuaj yeem ua rau tsis muaj kev xav txog corrosion, kev saib xyuas tsis tu ncua, thiab kev hloov lub cev ntxov ntxov.
Yog li, qhov twg alloy yog haum rau koj daim ntawv thov? Qhov kev sib piv ntxaws no yuav pab koj nkag siab txog qhov sib txawv thiab txiav txim siab paub.
C68700 thiab C12200 yog dab tsi?
Qhov tseem ceeb sib txawv ntawm ob lub alloys yog nyob rau hauv lawv cov chemistry.ASTM B111 C68700 Covyog tooj dag-raws li alloy (tooj liab-zinc nrog txhuas thiab arsenic), thaum C12200 yog cov khoom lag luam ntshiab tooj liab nrog me me ntawm phosphorus.
| Element | ASTM B111 C68700 (Aluminium Brass) | C12200 (phosphorized tooj liab) |
|---|---|---|
| Copper (Cu) | 76.0 - 79.0% | 99.9% min |
| Zinc (Zn) | Tseem tshuav (kwv yees . 20.5%) | - |
| Aluminium (Al) | 1.8 - 2.5% | - |
| Arsenic (As) | 0.02 - 0.06% | - |
| Phosphorus (P) | - | 0.015 - 0.040% |
| Lwm Yam Khoom | 0.3% max | 0.1% max |
Kev nkag siab tseem ceeb:C12200 yog ze li ntawm tooj liab ntshiab, thaumC68700 yog ib tug complex engineered alloytsim tshwj xeeb rau kev siv dej hiav txwv.
Dab tsi Alloy muab kev tiv thaiv corrosion zoo dua rau koj daim ntawv thov?
Kev tiv thaiv corrosion feem ntau yog qhov # 1 kev txhawj xeeb rau cov kws ua haujlwm xaiv cov raj kub hloov pauv.
ASTM B111 C68700 Covtau tsim tshwj xeeb rau kev pabcuam dej hiav txwv thiab dej brackish. Cov ntsiab lus aluminium pab tsim cov yeeb yaj kiab oxide tiv thaiv, thaum lubarsenic ntxiv tiv thaiv dezincification- hom tsis ua hauj lwm hauv cov tooj dag.
C12200, yog tooj liab ntshiab, muaj kev tiv thaiv corrosion zoo hauvdej tshiab, chav dej, thiab tsis yog - ib puag ncig nruj. Txawm li cas los xij, nws ua haujlwm tsis zoo hauv cov dej hiav txwv lossis cov kua dej uas muaj sulfides.
| Corrosion Ib puag ncig | ASTM B111 C68700 Cov | C12200 |
|---|---|---|
| Dej ntshiab huv | Zoo | Zoo heev |
| Siab -Ncej dej hiav txwv | Zoo heev | Poor (kev yaig sai) |
| Tsawg-Nqe dej hiav txwv | Fair (risk ntawm pitting) | pluag |
| Chav / Condensate | Ncaj ncees | Zoo heev |
| Sulfide-Cov kua dej | pluag | Neeg pluag heev |
| Ammonia Ib puag ncig | pluag | Ncaj ncees |
Kev txiav txim:Rau dej hiav txwv,xaiv C68700. Rau dej tshiab los yog chav dej,xaiv C12200.
Mechanical Properties Sib piv ntawm C68700 thiab C12200 li cas?
Cov cuab yeej siv tshuab txiav txim siab seb lub raj zoo li cas tiv taus siab, kev co, thiab kev teeb tsa kev ntxhov siab.
| Khoom | ASTM B111 C68700 Cov | C12200 |
|---|---|---|
| Tensile zog (min, psi) | 50,000 | 40,000 |
| Yield zog (min, psi) | 18,000 | 12,000 |
| Elongation (min,%) | 30 | 35 |
| Hardness (Rockwell F) | 60 - 80 | 40 - 65 |
| Thermal conductivity (W / m · K) | ~120 | ~380 |
ASTM B111 C68700 muaj zog duatshaj C12200 - kwv yees li 25% siab zog tensile. Qhov no txhais tau tias C68700 hlab tuaj yeem tiv taus kev ua haujlwm siab dua thiab tiv taus ntau dua rau kev co- ua rau qaug zog.
Txawm li cas los xij, C12200 muajntau dua thermal conductivity(kwv yees li 3x siab dua), ua kom muaj txiaj ntsig zoo rau kev hloov hluav taws xob hauv kev siv huv.
Cov Alloy twg yooj yim dua rau nruab, khoov, thiab Weld?
Cov nqi teeb tsa tuaj yeem cuam tshuam rau koj qhov project pob nyiaj siv.
ASTM B111 C68700 Cov Lus Qhia:Muaj zoo formability tab sis yuav tsum taukev kho cua sov kom zoo tom qab khoovlos tiv thaiv kev ntxhov siab corrosion cracking. Vuam nyuaj thiab tsis pom zoo - siv cov menyuam nthuav dav lossis brazing hloov.
C12200: Zoo heev formability thiab weldability.Cov hlau no tuaj yeem khoov, flared, thiab welded nrog cov txheej txheem txheem. Nws yog qhov kev xaiv zoo tshaj plaws rau kev sib koom ua ke ntawm cov raj sib txuas thiab kev kho thaj chaw.
Installation tswv yim:Yog tias koj tus qauv tsim yuav tsum tau vuam dav lossis nruj U- khoov,C12200 yog qhov yooj yim dua los ua haujlwm nrog. Rau cov menyuam- nthuav dav cov raj ncaj,ob qho tib si alloys ua tau zoo.
Yuav Ua Li Cas Txog Tus Nqi - Qhov twg yuav txuag koj nyiaj ntau dua?
Tus nqi yog ib txwm xav txog, tab sis nco ntsoov qhov tseem ceeb ntawm tag nrho cov nqi ntawm lub neej, tsis yog tus nqi yuav khoom xwb.
| Nqi Factor | ASTM B111 C68700 Cov | C12200 |
|---|---|---|
| Tus nqi raw khoom | Nruab nrab | qis |
| Tus nqi installation | Nruab nrab (yuav tsum tau saib xyuas) | qis dua (yooj yim ua haujlwm) |
| Expected Lifespan (Seawater) | 15-25 xyoo | 1-5 xyoos |
| Cia siab rau Lifespan (Fresh Water) | 15-20 xyoo | 20-30+ xyoo |
Rau kev siv dej tshiab:C12200 yog kev lag luam ntau dua tag nrho vim cov khoom siv qis dua thiab kev ua neej ntev dua.
Rau kev siv dej hiav txwv: ASTM B111 C68700 yog qhov pheej yig dua nyob rau lub sijhawm ntevvim C12200 yuav ua tsis tau sai, yuav tsum tau nquag retubing.
Thaum twg Koj Yuav Tsum Xaiv C12200 Tshaj C68700?
C12200 yog qhov kev xaiv zoo dua hauv cov xwm txheej no:
Cov dej txias txias(dej, pas dej, cov yees txias) - C12200 kav ntau xyoo
Chav condensernyob rau hauv ib puag ncig huv si - zoo heev tiv thaiv chav - sab corrosion
HVAC chillerssiv dej tshiab los yog glycol - siab thermal conductivity txhim kho efficiency
Cov ntawv thov uas yuav tsum tau siv vuam dav- C12200 yog yooj yim welded
Tsawg- cov ntawv thov siabqhov twg lub zog tsis tseem ceeb
Thaum twg Koj Yuav Tsum Xaiv C68700 Hloov?
Yog tias koj daim ntawv thov cuam tshuam nrog dej hiav txwv, dej brackish, lossis ib qho siab - dej nrawm nrog cua nkag, koj yuav tsum xaiv ASTM B111 C68700.C12200 yuav raug kev txom nyem los ntawm corrosion sai sai thiab impingement nres, tej zaum yuav ua tsis tau tejyam nyob rau hauv lub hlis es ntau xyoo.
Cov ntawv thov tshwj xeeb xav tauC68700suav nrog:
Fais fab nroj tsuag condensers siv seawater los yog dej brackish
Marine heat exchangers thiab auxiliary coolers
Desalination cog ua ntej- tso cua sov
Chemical plant coolers nrog saline txias dej
Offshore platform cua txias tshuab
Kev sib piv: Fais fab cog vs. HVAC Chiller
Scenario 1: Coastal Power Plant (Seawater Cooling)
SivC12200→ Tubes tsis pub dhau 6-12 lub hlis vim kev xeb corrosion
SivASTM B111 C68700 Cov→ Tubes kav 15-20 xyoo nrog kev tu kom zoo
Tus Qauv Zauv: C68700
Scenario 2: Chaw Ua Haujlwm Lub Tsev HVAC (Coling Tower Dej)
SivC12200→ Tubes kawg 20-30 xyoo, zoo heev tshav kub hloov
SivASTM B111 C68700 Cov→ Tsis tas li ua haujlwm tab sis qis thermal conductivity thiab tus nqi siab dua
Tus yeej: C12200
100% Kev Tshuaj Xyuas Ib ASTM B111 / C68700 - Cov Neeg Siv Khoom Pom Zoo
Txhua lub raj hauv ntau qhov no tau dhau qhov thib peb - tog neeg pom kev tshuaj xyuas raws li ASTM B111 tus qauv rau C68700 alloy. Hauv qab no yog cov duab tiag tiag los ntawm cov neeg siv khoom- kev tshuaj xyuas ntawm qhov chaw, suav nrog kev ntsuas tam sim no thiab kev txheeb xyuas qhov ntev.
Cov khoom tshawb xyuas tau lees paub:
• Eddy tam sim no kuaj (ECT) – tsis dhau los ntawm - phab ntsa tsis xws luag
• Sab nraud txoj kab uas hla & phab ntsa thickness - nyob rau hauv ± 0.02mm kam rau ua
• Nto tiav & temper (O61) - ua raws li ASTM
• Hardness & tshuaj muaj pes tsawg leeg – tau ntawv pov thawj.
Export-Packing - Anti-Xeb & Ntoo Case
Tom qab kev soj ntsuam dhau lawm, tag nrho cov raj tau ntim raws li cov qauv xa tawm thiab cov neeg siv khoom - cov cai tshwj xeeb. Cov txheej txheem ntim khoom tau sau tseg hauv qab no kom paub meej txog kev taug qab thiab kev puas tsuaj - pub dawb.
Packing cov kauj ruam qhia hauv video & duab:
1. Tube tu & ziab
2. Cov kaus mom yas kawg ntawm ob qhov kawg
3. VCI los tiv thaiv- xeb daim ntawv qhwv
4. Bundle strapping nrog noo noo barrier zaj duab xis
5. Plywood ntoo rooj plaub (ISPM-15 raws) nrog ua npuas ncauj padding
6. Daim ntawv lo nrog ASTM qib, ntau tus lej, thiab cov ntawv tshuaj ntsuam xyuas
Peb lub Hoobkas & Khoom siv
Tag nrho cov raj ASTM C68700 yog tsim thiab tshuaj xyuas ntawm peb hauv - khoom siv hauv tsev, tso cai rau tag nrho cov txheej txheem tswj los ntawm billet casting mus rau qhov kawg ntim.
Cov khoom siv tseem ceeb siv rau ntau qhov no:
• Induction melting rauv – precision alloying (Cu + Zn + Al + As)
• Kab rov tav nruam casting – ib yam li cov qauv billet
• Extrusion xovxwm (800T / 1630T) – seamless raj txoj kev
• Txias kos duab lub rooj ntev zaum (5–40m) - qhov tseeb qhov tseeb rau ± 0.02mm
• Online eddy tam sim no tester (FOERSTER / MAC) - 100% NDT
• Ultrasonic phab ntsa thickness ntsuas - tiag - xyuas lub sij hawm
• Lub qhov cub tawg (tswj cua) – kub O61
Hauv -house metrology: Micrometers, pin gauges, optical comparator, hardness tester (HV/HRB)
Tag nrho cov cuab yeej yog calibrated peb lub hlis twg. Cov ntaub ntawv ntau lawm yog traceable los ntawm ntau tus lej.
Copper & Copper Alloy Cov Khoom - Cov Khoom Muag Khoom
| Daim ntawv khoom | Common Alloys / Qib | Qhov Loj | Cov qauv | Tej kev siv |
|---|---|---|---|---|
| Tube / Tube | C12200, C11000, C68700, C70600, C71500, C44300, C27000 | OD: 4mm-219mm Phab ntsa: 0.5mm-20mm Ntev: mus txog 15m |
ASTM B68, B75, B111, B280, B359, B466 | Thaum tshav kub kub exchangers, condensers, HVAC, kav dej, roj txias |
| Phaj / Ntawv | C11000, C12200, C26000, C26800, C52100, C68700 | Loj: 0.5mm-50mm Dav: mus txog 1200mm Ntev: mus txog 4000mm |
ASTM B152, B169, B103, B465 | Hluav taws xob qhov chaw, ru tsev, gaskets, industrial panels |
| Qws / Bar | C11000, C26000, C36000, C46400, C48500, C63000 | Loj: 3mm-120mm Ntev: 1m - 6m (los yog kev cai) |
ASTM B16, B124, B138, B150, B453 | Valve stems, shafts, fasteners, machined Cheebtsam |
| Hlau | C11000, C16200, C17500, C26000, C52100, C64700 | Loj: 0.1mm-12mm Coil hnyav: mus txog 100kg |
ASTM B1, B2, B3, B197, B206, B624 | Vuam electrodes, hluav taws xob conductors, springs, mesh |
| Sawb / Ntawv Nyiaj | C11000, C19400, C26000, C26800, C52100, C70250 | Loj: 0.05mm-3.0mm Dav: 5mm-600mm |
ASTM B36, B465, B694, B888 | Connectors, terminals, roj teeb tabs, shielding, stamping qhov chaw |
Tshawb xyuas Hnub no Cov Tshuag & Lub Sijhawm Lead
