Vim li cas cov cua kub exchangers siv C70600 tooj liab nickel raj?
VimC70600 muab qhov zoo tshaj plaws tshuav nyiaj li cas ntawm corrosion kuj thiab tshav kub hloov.
Thaum tshav kub kub exchanger raj fim peb qhov kev hem thawj: corrosion los ntawm cov dej txias, fouling los ntawm cov kab mob hauv hiav txwv, thiab yaig los ntawm qhov siab tshaj tawm. ASTM B111 C70600 chaw nyob tag nrho peb.
Qhov zoo tshaj plaws rau cov cua sov exchangers:
Thermal conductivity ntawm 45 W / (m·K)- Hloov cov cua sov kom zoo yam tsis muaj phab ntsa tuab heev
Seawater corrosion kuj- kav ntev 20+ xyoo nyob rau hauv ntug dej hiav txwv fais fab nroj tsuag condensers
Biofouling kuj- txo qhov zaus ntawm kev ntxuav lub raj
Erosion kuj- withstands ntws ceev mus txog 3.0 m / s nrog tsawg hnav
Dab tsi yog qhov kev siv hluav taws xob hloov pauv rau C70600 raj?
| Daim ntawv thov | Kev lag luam | Vim li cas C70600 thiaj xaiv |
|---|---|---|
| Nto condenser | Lub zog cog | Cools turbine tso pa nrog dej hiav txwv |
| Txias | Tshuaj cog | Siv cov dej tsis huv los yog cov dej tsis huv |
| Lub rhaub | Desalination cog | Resistant brine corrosion ntawm siab kub |
| Evaporator | Marine (nkoj) | Cov dej tshiab tsim los ntawm cov dej hiav txwv |
| Intercooler / aftercooler | Compressor chaw nres tsheb | Compact loj, zoo tshav kub hloov |
ASTM B111 C70600 raj qhov ntev rau kev pab cuam tshav kub
Standard OD ntau yam muaj los ntawm Tshuag
| Sab nraud txoj kab uas hla (mm) | Phab ntsa thickness (mm) | Typical BWG gauge |
|---|---|---|
| 6.35 | 0.71 | 22 BWG |
| 9.52 | 0.89 | 20 BWG |
| 12.70 | 0.89 – 1.24 | 20-18 BWG |
| 15.88 | 1.02 – 1.24 | 19-18 BWG |
| 19.05 | 1.24 – 1.65 | 18-16 BWG |
| 25.40 | 1.24 – 2.11 | 18-14 BWG |
| 31.75 | 1.65 – 2.41 | 16-13 BWG |
| 38.10 | 1.65 – 2.77 | 16-12 BWG |
| 44.45 | 1.65 – 3.05 | 16-11 BWG |
| 50.80 | 1.65 – 3.40 | 16 – 10 BWG |
Qhov siab tshaj lub raj ntev: mus txog 30 meters seamless. Ntev ntev muaj raws li qhov kev thov.
Yuav ua li cas xaiv txoj cai C70600 raj phab ntsa thickness rau cua sov exchanger?
Phab ntsa thickness xaiv nyob ntawm peb yam: siab, corrosion pub, thiab tubing txhawb qhov sib nrug.
Kauj Ruam 1 - Xam qhov xav tau ntawm lub siab sab hauv
Rau cov dej txias hauv qab 2.0 MPa, 0.89mm (20 BWG) feem ntau txaus
Rau siab dua los yog chav ua haujlwm, siv 1.24mm (18 BWG) lossis tuab dua
Kauj Ruam 2 - Ntxiv kev tiv thaiv corrosion
Dej hiav txwv: 0.1-0.2mm
Cov dej qias neeg los yog dej khov: 0.3-0.5mm
Tsis muaj kev tso cai ntxiv rau kev txhim kho sab hauv yog tias tswj tau qhov nrawm nrawm
Kauj Ruam 3 - Txheeb xyuas qhov sib nrug ntawm lub raj
Thinner tubes (0.89mm) yuav tsum tau muab kev txhawb nqa ze dua los tiv thaiv kev co
Thicker tubes (1.65mm +) tuaj yeem ncua ntev ntawm cov baffles
Kev xyaum ua lag luam: Feem ntau lub plhaub-thiab- raj kub exchangers nrog C70600 raj siv 19.05mm OD x 1.24mm phab ntsa thickness (18 BWG) rau seawater txias.
Dab tsi ua rau C70600 kub exchanger raj tsis ua hauj lwm?
Txawm tias muaj cov khoom siv zoo heev, kev ua tsis tiav tshwm sim. Nov yog cov laj thawj tiag tiag:
| Ua tsis tiav hom | Keeb kwm | Kev kuaj xyuas txoj kev |
|---|---|---|
| Pitting corrosion | Cov ntsiab lus hlau tsawg (<1.0%) or stagnant water | Kev kuaj pom pom, eddy tam sim no kuaj |
| Kev txhim kho corrosion | Hauv zos tshaj tawm> 3.5 m / s (inlet kawg) | Thickness ntsuas ntawm lub raj inlet |
| Kev nyuaj siab corrosion cracking | Ammonia paug hauv dej txias | Kev kuaj mob microscopic, kuaj ammonia |
| Kev vibration fretting | Kev them nyiaj yug baffle tsis txaus | Tube OD hnav cov cim ntawm cov ntsiab lus txhawb nqa |
| Tube daim ntawv crevice corrosion | Tsis zoo lub raj expansion los yog gasket to | Dye penetrant test ntawm dov sib koom |
Feem ntau qhov chaw tsis ua haujlwm: Inlet kawg ntawm cov hlab ntsha (thawj 300mm) vim muaj kev kub ntxhov thiab cov khib nyiab impingement.
Yuav ua li cas tswj cov raj C70600 hauv kev pab cuam tshav kub?
Kev saib xyuas kom zoo txuas lub raj lub neej mus rau 25+ xyoo.
Maintenance checklist:
Txhua hli
Saib xyuas kev khiav ceev (kwv ntawm 1.0 - 3.0 m / s)
Tshawb xyuas cov dej khib nyiab hauv dej (strainers / lim)
Cov ntaub ntawv siab poob thoob plaws exchanger (sudden nce qhia tias fouling)
Peb lub hlis twg
Ua eddy tam sim no kuaj ntawm cov hlab neeg sawv cev
Ntsuas phab ntsa thickness ntawm inlet kawg
Tshawb xyuas cov ntawv sib txuas ntawm lub raj xa dej
Txhua xyoo
Ntxuav cov raj nrog cov pob txhuam los yog tshuaj ntxuav (tsis txhob muaj ammonia- cov tshuaj ntxuav raws li )
Hloov cov kaus mom kawg thiab gaskets
Tshawb xyuas cov ntaub ntawv qhia txog dej chemistry (chloride, ammonia, oxygen, pH)
Tsis txhob siv:
Hydrochloric acid rau kev ntxuav (ua rau pitting)
Hlau txhuam (kab qhov tiv thaiv oxide txheej)
Ammonia{0}}raws li cov kuab tshuaj (ua rau muaj kev ntxhov siab corrosion cracking)
FAQ
Dab tsi yog qhov siab tshaj plaws khiav ceev rau C70600 tshav kub exchanger raj?
3.0 m / s rau kev pabcuam dej hiav txwv txuas ntxiv. Txog li 3.5 m / s yog siv tau rau cov dej huv uas tsis muaj cov khib nyiab. Tshaj 3.5 m / s, yaig corrosion nrawm nrawm.
C70600 lub raj puas tuaj yeem siv rau hauv kev pabcuam dej tsis zoo?
Yog lawm, C70600 yog ib qho ntawm cov ntaub ntawv zoo tshaj plaws rau cov dej khib nyiab. Kev tiv thaiv corrosion zoo heev txawm tias muaj kev sib txawv ntawm salinity. Txawm li cas los xij, tsis txhob nyob twj ywm thiab tswj cov dej ntws siab tshaj 1.0 m / s.
Dab tsi yog qhov txawv ntawm C70600 thiab C71500 rau condenser raj?
C70600 muaj thermal conductivity ntau dua (45 vs 29 W / m·K) thiab tus nqi qis dua. C71500 muaj cov tshuaj ammonia zoo dua thiab muaj zog dua. Rau feem ntau cov fais fab nroj tsuag nto condensers, C70600 yog tus qauv xaiv.
Yuav ua li cas ntxuav cov hlab C70600 yam tsis ua puas rau lawv?
Siv daim txhuam cev pob (polyurethane) los yog tshuaj ntxuav nrog sulfamic acid. Tsis txhob siv hydrochloric acid. Tsis txhob siv cov txhuam hniav hlau. Rau cov nplai hnyav, sab laj nrog tus tsim nyog tshuaj ntxuav cov neeg cog lus.
Dab tsi eddy tam sim no xeem tus qauv siv rau C70600 tshav kub exchanger raj?
ASTM E243 yog tus qauv kev coj ua rau kev ntsuas tam sim no ntawm tooj liab thiab tooj liab alloy raj. Thov 100% eddy kuaj tam sim no nrog calibration qauv raws li ASTM E243.
Puas yog C70600 raj haum rau U-cov khoom siv hluav taws xob sib txuas?
Yog lawm, C70600 yog qhov tsim nyog rau U- khoov daim ntawv thov. Siv kev ntxhov siab-cov hlab ntsha (tsis yog tag nrho annealed) kom txo lub caij nplooj ntoos hlav- rov qab. Yam tsawg kawg khoov vojvoog yog feem ntau 1.5 x raj OD.
Dab tsi yog qhov raug lub raj suab rau C70600 hauv lub plhaub thiab lub raj cua kub exchanger?
Standard raj pitch yog 1.25 x raj OD rau daim duab peb sab qauv, los yog 1.30 x raj OD rau square qauv. Rau 19.05mm OD raj, cov pitches feem ntau yog 23.8mm (daim duab peb sab) thiab 24.8mm (square).
C70600 puas tuaj yeem nthuav dav rau hauv cov ntawv raj?
Yog lawm, C70600 raj nthuav dav yooj yim. Siv tswj dov nrog 10-15% txo cov raj phab ntsa thickness. Ib txwm sim nthuav ob lub raj ua ntej tag nrho cov khoom.
Dab tsi yog cov khoom siv gasket yog sib xws nrog C70600 raj ntawv sib txuas?
Siv tsis yog -asbestos gaskets lossis EPDM. Tsis txhob siv cov khoom siv uas muaj cov sulfur dawb lossis cov chlorides siab. Neoprene thiab nitrile kuj tau txais.
Ntev npaum li cas C70600 raj kav ntev npaum li cas hauv lub tshuab fais fab nto condenser?
Feem ntau 20-30 xyoo nrog dej chemistry thiab tswj kev ntws. Ntau lub chaw tsim hluav taws xob ntug dej hiav txwv qhia txog 25+ xyoo kev pabcuam. Hloov thaum phab ntsa thickness txo los ntawm 40% los yog thaum lub raj xau heev.
Dab tsi yog tus qauv temper rau C70600 tshav kub exchanger raj?
O60 (mos annealed) yog tus qauv. Rau U-khoov daim ntawv thov, thov kev ntxhov siab- cov hlab ntsha. Hard drawn tubes tsis yog siv rau cov cua kub exchangers.
Puas yog lub raj OD kam rau ua qhov teeb meem rau cov khoom siv hluav taws xob sib txuas?
Yog, nruj OD kam rau ua kom haum haum rau hauv cov ntawv raj. ASTM B111 xav tau OD kam rau ua ntawm ± 0.05mm rau cov raj hauv qab 25.4mm OD, thiab ± 0.08mm rau qhov ntau thiab tsawg.
Cov kev sim
Eddy tam sim no xeem (ECT) rau ASTM E243
Hydrostatic xeem mus txog 20 MPa
PMI (XRF) rau kev txheeb xyuas alloy ntawm txhua qhov cua sov
Mechanical Properties Test (tensile, hardness, flattening, expansion)
Microscopic kuaj rau grain qauv
Flattening xeem rau ASTM B111
Rov qab flattening xeem rau welded raj (qhov twg muaj feem xyuam)
Ntim cov qauv
Yas kawg lub kaus mom ntawm ob qhov kawg kom tiv thaiv kev sib kis
Ib tug neeg polybag wrapping rau txhua lub raj
Ntoo crates lossis steel spools rau export
Cov dej noo-cov ntaub ntawv pov thawj thiab cov khoom desiccant rau kev xa khoom hauv hiav txwv
Sau npe nrog tus lej xov tooj cua sov, qhov loj me, thiab qhov ntau ntawm txhua pob
Xim -coded bands rau kev txheeb xyuas cov alloy
Cov khoom siv ntau lawm
Extrusion xovxwm (1500T thiab 2500T)
Cov tshuab kos duab txias (10 kab, OD ntau 4mm txog 90mm)
Annealing furnaces (tswj chaw, 650-750 degree)
Straightening thiab txiav kab
U-bending tshuab rau cua sov exchanger raj
Eddy tam sim no kuaj tshuab (3 units)
Peb cov khoom siv tooj liab
| Yam khoom | Cov alloys | Qhov ntau thiab tsawg |
|---|---|---|
| Tube (seamless) | C10100, C10200, C12200, C70600, C71500, C44300, C68700 | OD 4mm-90mm, WT 0.3mm-5.0mm |
| Tube (seamless) | C12200, C70600, C71500 | OD 10mm-108mm, WT 1.0mm-8.0mm |
| Qws / bar (round, hex, square) | C10100, C10200, C11000, C36000, C46400, C63000 | Dia 3mm-100mm |
| Hlau | C10100, C10200, C11000, C16200, C19400 | Dia 0.1mm-8.0mm |
| Sawb / coil | C10100, C10200, C11000, C19400, C26000, C26800, C52100 | Thk 0.1mm-3.0mm, dav txog 400mm |
| Phaj / ntawv | C10100, C10200, C11000, C12200, C70600, C71500, C46400 | Thk 0.5mm-50mm, dav mus txog 1000mm |
