Titanium Tube kav ntev npaum li cas hauv Seawater?
May 22, 2026
Titanium tsim ib tus kheej - kho oxide zaj duab xis uas tam sim ntawd hloov kho yog puas. Cov yeeb yaj kiab no ua rau titanium tiv taus cov pitting, crevice corrosion, thiab yaig -corrosion hauv dej hiav txwv.
Titanium raj feem ntau kav ntev li 20-30 xyoo hauv kev pabcuam dej hiav txwv. Hauv ntau qhov tiag -kev teeb tsa hauv ntiaj teb, titanium tau ua yam tsis muaj kev ua haujlwm rau ntau tshaj 30 xyoo. Copper-nickel thiab stainless hlau raj feem ntau ua tsis tiav hauv 5-10 xyoo nyob rau hauv tib yam kev mob.
Titanium vs Lwm cov ntaub ntawv
| Khoom siv | Hom Kev Pabcuam Lub Neej hauv Seawater | |
|---|---|---|
| Titanium (Gr.1/Gr.2/Gr.7) | 20-30+ xyoo | Zoo tsis muaj - tseem nyob hauv kev pabcuam |
| Tooj liab -Nickel (90/10) | 5-10 xyoo | Kev yaig-corrosion, pitting |
| Stainless hlau (316L) | 2-5 xyoos | Pitting, crevice corrosion, SCC |
| Admiralty Brass | 3-8 xyoo | Dezincification, yaig |
Titanium Tube nyob rau hauv Seawater Service Real Case Data
Middle East Desalination tsob nroj (U-bent Tubes)
Khoom siv:Gr.1 titanium raj
Daim ntawv thov:Brine rhaub, dej hiav txwv ntawm 70-80 degree
Installation Xyoo: 2005
Service Life to Date: 19 xyoo
Qhov xwm txheej:Tsis muaj corrosion, tsis muaj pitting, tseem nyob hauv kev pabcuam
Cia siab rau lub neej:30+ xyoo
Nyiv Power Plant (Condenser Tubes)
Khoom siv:Gr.2 titanium raj
Daim ntawv thov:Seawater condenser
Installation Xyoo: 1990
Service Life to Date: 35 xyoo
Qhov xwm txheej:Cov raj qub tseem nyob hauv kev pabcuam. Tsis muaj dej paug. Tsis muaj thinning.
Cia siab rau lub neej:40+ xyoo
USA Coastal Power Plant (Retrofit Replacement)
Cov khoom qub:Copper-nickel tubes - ua tsis tiav tom qab 8 xyoo
Hloov cov khoom siv:Gr.1 titanium raj
Installation Xyoo: 2002
Service Life to Date: 23 xyoo
Qhov xwm txheej:Tsis muaj corrosion, tsis xav tau hloov. Thawj tooj liab-nickel raj tau hloov ob zaug ua ntej titanium.
Middle East Desalination (Multistage Flash)
Khoom siv:Gr.7 titanium raj (palladium qib)
Daim ntawv thov:Tsis lees txais cov brine txias, cov xwm txheej ruaj khov
Installation Xyoo: 2008
Service Life to Date: 17 xyoo
Qhov xwm txheej:Tsis muaj crevice corrosion ntawm lub raj ntawv. Gr.7 xaiv tshwj xeeb rau thaj chaw nyob ruaj khov.
Cia siab rau lub neej:30+ xyoo
European Offshore Platform
Khoom siv:Gr.2 titanium raj
Daim ntawv thov:Seawater txias rau cov khoom siv sab saum toj
Installation Xyoo: 1995
Service Life to Date: 30 xyoo
Qhov xwm txheej:Original tubes tseem siv tau. Tsis muaj corrosion. Tsis tu.
Cia siab rau lub neej:35-40 xyoo
Tuam Tshoj Nuclear Fais Fab Cog (Condenser Retrofit)
Cov khoom qub:Stainless hlau raj - pitting tsis ua hauj lwm tom qab 6 xyoo
Hloov cov khoom siv:Gr.2 titanium raj
Installation Xyoo: 2010
Service Life to Date: 15 xyoo
Qhov xwm txheej:Tsis muaj corrosion. Tsis muaj dej paug. Kev tshuaj xyuas txhua xyoo qhia tias xoom tube degradation.
Cia siab rau lub neej:30+ xyoo
Titanium vs Stainless hlau
| Parameter | Stainless hlau (316L) | Titanium (Gr.1 / Gr.2) |
|---|---|---|
| Hom kev pab cuam lub neej nyob rau hauv seawater | 2-5 xyoos | 20-30+ xyoo |
| Ua tsis tiav hom | Pitting, crevice corrosion, SCC | Tsis muaj (corrosion resistant) |
| Hloov cov voj voog (tshaj 30 xyoo) | 6-10 zaug | 0x ua |
| 30-xyoo tus nqi (khoom siv + ua haujlwm + downtime) | Siab heev (hloov tas mus li) | qis (ib - lub sijhawm nruab) |
| Kev txwv ceev | < 2.0 m/s (pitting risk at low flow) | Tsis txwv |
| Pitting kuj | Tsis zoo (tawg hauv chlorides) | Zoo heev |
| Crevice corrosion kuj | Tsis zoo (ua tsis tau raws li gaskets / biofouling) | Zoo (Gr.7 xav tau rau stagnant) |
| Kev ntxhov siab corrosion cracking (SCC) | Yog (Chloride SCC Risk) | Tiv thaiv kab mob |
Ntau lub zog cog thiab desalination cov ntaub ntawv ua haujlwm (Nyiv, Asmeskas, Middle East, Europe).
Vim li cas Titanium Outperforms Stainless Hlau hauv Seawater
| Qhov xwm txheej | Stainless hlau (316L) | Titanium |
|---|---|---|
| Oxide zaj duab xis stability | Nws tawg hauv chlorides | ruaj khov nyob rau hauv tag nrho cov seawater tej yam kev mob |
| Chloride kam rau ua | Limited (qhov siab> 1000 ppm Cl⁻) | Unlimited |
| Kev txhim kho corrosion | tshwm sim ntawm chav tsev kub | Resistant mus txog qhov kub thiab txias (Gr.7 rau stagnant) |
| SCC kev pheej hmoo | Yog lawm (chloride SCC) | Tiv thaiv kab mob |
| Biofouling | Biofilm tuaj yeem ua kom corrosion | Biofouling tsis ua rau corrosion |
Vim li cas titanium nyob ntev heev hauv dej hiav txwv?
| Tus kheej- kho oxide zaj duab xis | Titanium tam sim ntawd rov- ua nws cov txheej tiv thaiv oxide yog tias puas |
| Tsis muaj pitting | Uniform corrosion yog negligible - tsawg dua 0.001 mm / xyoo |
| Tsis muaj kev txwv ceev | High flow rate tsis erode titanium (tooj liab alloys erode) |
| Tsis muaj SCC | Titanium tiv thaiv kev ntxhov siab corrosion tawg hauv dej hiav txwv |
| Crevice kuj (Gr.7) | Palladium- ntxiv cov qhab nia tiv thaiv crevice corrosion txawm nyob rau hauv qhov tsis zoo |
FAQ
1. Gr.1 titanium raj kav ntev npaum li cas hauv dej hiav txwv?
20-30+ xyoo nyob hauv dej hiav txwv ntws. Ntau qhov kev teeb tsa los ntawm xyoo 1990s tseem nyob hauv kev pabcuam uas tsis muaj corrosion. Corrosion tus nqi tsawg dua 0.001 mm / xyoo.
2. Puas yog titanium xeb lossis corrode hauv dej hiav txwv?
Tsis yog. Titanium ua tus kheej - kho oxide zaj duab xis uas tiv thaiv xeb thiab xeb. Nws zoo li tshiab txawm tias tom qab xyoo caum hauv dej hiav txwv.
3. Puas yog Gr.7 tsim nyog rau seawater heat exchangers?
Tsuas yog tias muaj dej hiav txwv tsis tu ncua los yog qhov kev pheej hmoo ntawm kev tawg (tube-rau-tubesheet pob qij txha, hauv qab gaskets, lossis biofouling). Rau cov dej hiav txwv ntws, Gr.1 lossis Gr.2 txaus.
4. Dab tsi yog qhov kev pabcuam ntev tshaj plaws ntawm titanium raj hauv dej hiav txwv?
Tshaj li 35 xyoo (Nyiv fais fab nroj tsuag, ntsia xyoo 1990, tseem ua haujlwm). Cia siab tias yuav ncav cuag 40+ xyoo.
5. titanium zoo li cas piv rau tooj liab-nickel rau lub neej ntev?
Copper-nickel kav 5-10 xyoo. Titanium kav ntev 20-30+ xyoo. Tshaj 30 xyoo, tooj liab-nickel xav tau 3-4 hloov. Titanium xav tau xoom.
6. Dab tsi ua rau titanium raj tsis ua haujlwm hauv dej hiav txwv?
Yuav luag tsis muaj corrosion. Kev tsis ua haujlwm feem ntau yog cov neeg kho tshuab (kev txhim kho kev puas tsuaj, kev co, fretting) los yog crevice corrosion nyob rau hauv stagnant tej yam kev mob (siv Gr.7 los tiv thaiv).
7. Welded titanium raj tuaj yeem kav ntev npaum li seamless hauv dej hiav txwv?
Yog lawm. ASTM B338 welded raj, thaum ua haujlwm txias thiab annealed, muaj sib npaug corrosion tsis kam mus rau seamless. Qhov chaw weld tsis yog qhov tsis muaj zog.
8. Dab tsi yog qhov corrosion ntawm titanium hauv dej hiav txwv?
Tsawg dua 0.001 hli hauv ib xyoos. Lub 1.0 hli phab ntsa raj yuav theoretically kav tshaj 1,000 xyoo.
9. Puas yog qhov kub thiab txias cuam tshuam rau titanium lub neej kev pabcuam hauv dej hiav txwv?
Txog li 300℃(572℃F), titanium tuav zoo heev corrosion kuj. Nyob rau hauv tas li ntawd, oxidation accelerates. Feem ntau cov ntawv thov dej hiav txwv yog qis dua 100 degree.
10. Kuv yuav tau txais cov ntaub ntawv tiag tiag li cas rau kuv cov dej hiav txwv tshwj xeeb?
Hu rau GNEE. Peb tuaj yeem muab cov ntaub ntawv tshawb fawb los ntawm cov nroj tsuag zoo sib xws (lub zog, desalination, offshore) hauv koj cheeb tsam.
GNEE Titanium Tube
| Parameter | Paub meej |
|---|---|
| Cov qauv | ASTM B338, B861, B862 / ASME SB338, SB861, SB862 |
| Qib | Gr.1 (UNS R50250), Gr.2 (UNS R50400), Gr.7 (UNS R52400), Gr.9 (UNS R56320), Gr.12 (UNS R53400) |
| Hom | Seamless / Welded (TIG) / ERW / Fabricated |
| OD Ntau | Seamless: 1.0mm - 508mm / Welded: 6.0mm - 1219 hli |
| Phab ntsa Thickness | 0.3mm-50 hli |
| Thin Phab ntsa (Huab cua kub Exchanger) | 0.5 / 0.7 / 0.9 / 1.0 / 1.2 / 1.5 hli |
| Ntev | 3m - 30m (kev cai muaj) |
| Cov duab | Hloov / Square / Rectangular / U-bent / Coiled |
| Nto tiav | AP (Annealed & Pickled) / BA (Cim Annealed) / MP (Mechanical Polish) / EP (Electro Polish) |
| Xaus Xaus | Plain End / Beveled End / Threaded nrog lub kaus mom yas |
Tshuag Loj - Npaj Nkoj (OD x Phab Ntsa Thickness)
| OD (mm) | OD (inch) | Phab ntsa Thickness (mm) | Muaj Qib | Hom |
|---|---|---|---|---|
| 12.7 | 1/2" | 0.7 / 0.9 / 1.0 / 1.2 | Gr.1/Gr.2 | Seamless / Welded |
| 15.9 | 5/8" | 0.7 / 0.9 / 1.0 / 1.2 | Gr.1/Gr.2 | Seamless / Welded |
| 19.0 | 3/4" | 0.7 / 0.9 / 1.0 / 1.2 / 1.5 | Gr.1/Gr.2 | Seamless / Welded |
| 25.4 | 1" | 0.7 / 0.9 / 1.0 / 1.2 / 1.5 | Gr.1/Gr.2/Gr.7 | Seamless / Welded |
| 31.8 | 1-1/4" | 0.9 / 1.0 / 1.2 / 1.5 | Gr.1/Gr.2 | Seamless |
| 38.1 | 1-1/2" | 1.0 / 1.2 / 1.5 | Gr.1/Gr.2 | Seamless |
| 50.8 | 2" | 1.0 / 1.2 / 1.5 / 2.0 | Gr.1/Gr.2/Gr.9 | Seamless |
Custom Sizes
| Parameter | Custom Range |
|---|---|
| OD | Seamless: 1.0mm - 508mm / Welded: 6.0mm - 1219 hli |
| Phab ntsa Thickness | 0.3mm-50 hli |
| Ntev | 3 m – 30 m |
| Cov duab | Hloov / Square / Rectangular / U-bent / Coiled |
| U- cov hlab ntsha | Rau cov neeg siv khoom kos duab. Qhov tsawg kawg nkaus khoov vojvoog nyob ntawm OD / phab ntsa piv. |
15-25 hnub nyob ntawm seb muaj pes tsawg thiab qib.
