ASTM B111 C70600 rau Seawater Cooled Heat Exchangers

C70600 tiv thaiv dej hiav txwv corrosion, tiv thaiv biofouling, thiab raug nqi tsawg dua li cov khoom sib txawv.Peb yog vim li cas tsav txoj kev xaiv.

Ua ntej, corrosion kuj.C70600 tsim ib qho kev tiv thaiv nickel-hlau oxide zaj duab xis hauv dej hiav txwv. Zaj yeeb yaj kiab no kho tus kheej yog tias puas. Uniform corrosion tus nqi yog 0.025 mm / xyoo lossis tsawg dua. Tsis muaj pitting, tsis muaj cracking.

Thib ob, kev tiv thaiv biofouling.tooj liab ions maj mam tso tawm ntawm lub raj nto. Barnacles, mussels, thiab algae yuav tsis txuas. Tsis muaj lwm yam khoom siv raj ua qhov no ib txwm muaj.

Thib peb, tus nqi tsim nyog.C70600 zaum ntawm carbon steel (pheej yig tab sis ua tsis tau sai) thiab titanium (zoo heev tab sis kim). Rau feem ntau seawater heat exchangers, C70600 yog tus nqi zoo tshaj.

BWG 18 (1.24mm) thiab BWG 16 (1.65mm) yog ob feem ntau cov phab ntsa thicknesses rau C70600 tshav kub exchanger raj.Qhov kev xaiv nyob ntawm seawater aggressiveness thiab siab.

Hom BWG xaiv los ntawm daim ntawv thov:

Txoj cai dav dav:Thinner phab ntsa (BWG 18) kom zoo dua kub hloov. Phab ntsa Thicker (BWG 16) rau siab dua lossis ntev dua corrosion.

C70600 ntaus tooj liab thiab tooj dag hauv dej hiav txwv. Nws poob rau titanium hauv siab tshaj tawm lossis kev pabcuam kub.Tab sis titanium nqi 3-5x ntxiv. Ntawm no yog yuav ua li cas C70600 stacks.

Cov lus sib piv rau seawater txias cua sov exchangers:

Rau ib txwm seawater heat exchangers, C70600 yog tus qauv pov thawj. Tsis txhob downgrade rau txhuas tooj dag lossis 316L. Tsis txhob hloov mus rau titanium tshwj tsis yog tias koj xav tau.

Nyob qis dua 2.5 m / s thiab 60℃rau lub sij hawm ntev C70600 kev pab cuam tshav kub exchanger.Cov no yog ob qho kev txwv nyuaj.

Velocity limit piav qhia:

Hauv qab 1.5 m / s: nyab xeeb, tiv thaiv zaj duab xis ruaj khov

1.5 txog 2.5 m / s: tau txais kev pabcuam txuas ntxiv

Tshaj 2.5 m / s: impingement corrosion yuav nce

Tshaj 3.0 m / s: tsis txhob siv C70600

Temperature limit piav qhia:

Hauv qab 40 degree: zoo heev, qis tshaj corrosion

40 txog 60 degree: txais tau, saib xyuas tsis tu ncua

Tshaj 60 degree: corrosion tus nqi nrawm nrawm

Tshaj 80 degree: tsis txhob siv C70600

C70600 raj feem ntau kav 20 mus rau 30 xyoo nyob rau hauv tsim kom zoo seawater exchangers.Cov yeeb yaj kiab tiv thaiv nyob ruaj khov. Corrosion tus nqi yog kwv yees. Tsawg dua 1% ntawm cov hlab tsis ua haujlwm hauv thawj xyoo caum.

C70600 tus nqi kwv yees li 30-50% ntau dua li tooj liab lossis tooj dag, tab sis 70-80% tsawg dua titanium.Ntawm no yog tus nqi ntxhib sib piv rau ib kg.

Cov ntaub ntawv pheej yig dua (tooj liab, tooj dag, 316L) poob hauv dej hiav txwv. Cov nqi hloov pauv ntau dua li kev txuag nyiaj.

C70600 ua haujlwm thiab tus nqi tsim nyog.

Titanium ua haujlwm zoo kawg nkaus tab sis raug nqi ntau dua. Tsuas yog qhia titanium yog tias ceev tshaj 4 m / s, kub tshaj 80 degree, los yog xuab zeb yog tam sim no.

Siv C70600 rau feem ntau seawater heat exchangers. Hloov mus rau C71500 tsuas yog thaum tshaj tawm tshaj 2.5 m / s lossis kub tshaj 60 degree.

Q1: Vim li cas C70600 siv rau seawater heat exchangers?

C70600 muab peb qhov txiaj ntsig tseem ceeb rau seawater heat exchangers.Ua ntej, nws tiv taus dej hiav txwv corrosion nrog tus kheej kho oxide zaj duab xis. Qhov thib ob, nws tiv thaiv biofouling vim tooj liab ions tua barnacles thiab algae. Thib peb, nws raug nqi ntau dua li titanium thaum kav 20-30 xyoo. Tsis muaj lwm yam khoom siv raj ua ke tag nrho peb qhov zoo ntawm tus nqi no.

Q2: Dab tsi BWG feem ntau yog rau C70600 condenser raj?

BWG 18 (1.24mm phab ntsa) yog qhov tuab tshaj plaws rau C70600 condenser raj.Fais fab nroj tsuag thiab nkoj siv BWG 18 rau feem ntau daim ntawv thov. BWG 16 (1.65mm phab ntsa) yog siv rau siab dua lossis thaum xav tau kev tiv thaiv corrosion ntxiv. Cov phab ntsa Thicker txo cov cua sov hloov mus, yog li cov engineers qhia cov phab ntsa nyias uas tseem muaj kev nyab xeeb.

Q3: C70600 puas tuaj yeem siv rau evaporators?

Yog lawm, C70600 ua haujlwm zoo hauv evaporators, tsis yog condensers xwb.Txawm li cas los xij, xyuam xim rau qhov kub thiab txias. Cov evaporators feem ntau khiav kub dua li cov condensers. Khaws qhov kub hauv qab 60℃rau C70600. Tom ntej no, txav mus rau C71500. Kuj xyuas rau ob theem ntws (dej ntxiv rau vapor) uas tuaj yeem ua rau yaig txawm tias nyob nruab nrab.

Q4: Yuav ua li cas koj yob C70600 raj rau hauv ib lub raj ntawv?

C70600 raj tau nthuav dav rau hauv cov ntawv raj siv lub dov expander.Cov txheej txheem zoo ib yam li lwm cov tooj liab alloys. Siv lub teeb roj ua roj nplua nyeem. Yob kom txog thaum lub raj phab ntsa ruaj khov tiv thaiv lub raj lub qhov. Tsis txhob dhau yob. Annealed C70600 (O60 temper) yooj yim nthuav. Hard drawn C70600 yuav tsum tsis txhob siv rau cov ntawv raj vim nws yuav tawg.

Q5: Dab tsi yog qhov raug fouling rau C70600?

C70600 muaj qhov tsis zoo fouling vim nws tiv thaiv kev loj hlob ntawm cov kab mob lom.Rau kev tsim cov khoom siv hluav taws xob sib txawv, qhov fouling ntawm 0.0002 txog 0.0005 m²·K / W yog ib txwm rau C70600 hauv dej hiav txwv. Qhov no yog qhov qis dua li carbon steel (0.001-0.002) lossis stainless hlau (0.0005-0.001). Lower fouling factor txhais tau tias cov khoom siv hluav taws xob me me rau tib lub luag haujlwm.

Q6: Ntev npaum li cas C70600 cov cua kub exchanger kav?

20 mus rau 30 xyoo yog ib qho zoo rau C70600 kub exchangers.Cov yeeb yaj kiab tiv thaiv ua kom corrosion qis dua 0.025 hli / xyoo. Ntawm tus nqi no, 1.24mm BWG 18 raj siv sijhawm 40-50 xyoo kom poob ib nrab ntawm phab ntsa tuab. Hauv kev xyaum, lwm yam xws li inlet erosion lossis startup upsets ua rau tsis ua hauj lwm ua ntej corrosion tsis zoo. Txawm li cas los xij, 20-30 xyoo yog qhov zoo heev.

Q7: C70600 cov raj puas tuaj yeem hloov tus kheej?

Yog lawm, ib tus neeg C70600 hlab tuaj yeem rub thiab hloov tsis tau rov ua tag nrho cov pob.Koj txiav lub raj xa dej nrog cov ntawv raj ntawm ob qho kawg, faib nws nrog lub raj rub, tshem tawm, thiab yob lub raj tshiab rau hauv tib lub qhov. Qhov no yog kev coj ua. Khaws cov raj seem cia rau hauv vim li no.

Q8: Yuav ua li cas yog tias cov dej hiav txwv tshaj tawm tsawg dhau hauv lub tshuab hluav taws xob?

Sediment settles thiab khib nyiab accumulates thaum tshaj tawm poob qis dua 0.5-1.0 m / s.Qhov no yog stagnation. Cov khib nyiab nyob rau hauv deposits tuaj yeem tsim kev txhim kho hauv zos. Qee qhov kev loj hlob hauv hiav txwv kuj tseem tuaj yeem txuas ntawm qhov nrawm heev. Khaws tsawg kawg 1.0-1.5 m / s hauv C70600 hlab thaum ua haujlwm. Yog tias qhov nrawm yuav tsum qis dua, nce kev tshuaj xyuas ntau zaus.

Q9: Puas yog C70600 xav tau lub raj sab lossis lub plhaub sab seawater?

Dej hiav txwv yuav tsum ib txwm mus los ntawm lub raj sab, tsis yog lub plhaub sab, thaum siv C70600.Tube sab ntws tso cai rau kev ntxuav yooj yim dua, tswj kev nrawm dua, thiab kev tshuaj xyuas yooj yim dua. Plhaub sab seawater nrog tooj liab nickel raj yog tsawg thiab tsis pom zoo. Muab cov dej hiav txwv tso rau hauv cov raj. Muab dej txias los yog cov tub yees rau ntawm lub plhaub sab.

Q10: Dab tsi yog qhov siab tshaj plaws raj ntev rau C70600 tshav kub exchangers?

15 meters (kwv yees 49 ko taw) yog qhov ua tau zoo tshaj plaws rau C70600 raj yam tsis muaj kev txhawb nqa.Cov raj ntev dua yuav ua rau sagging thiab vibration. Rau cov bundles ntev dua, ntxiv kev txhawb nqa lub raj nruab nrab. Tube ntev tsis txwv los ntawm C70600 cov khoom tab sis los ntawm kev tsim kho tshuab. Qee lub tshuab fais fab siv 20-25 meter raj nrog ntau daim phiaj txhawb nqa.

Q11: Kuv puas tuaj yeem siv C70600 rau lub plhaub thiab lub raj kub sib hloov?

Yog lawm, C70600 muaj ntau heev nyob rau hauv lub plhaub thiab lub raj kub exchangers.Qhov tseeb, feem ntau cov dej hiav txwv txias lub plhaub thiab lub raj cua kub exchangers siv C70600 los yog C71500 raj. Cov khoom siv plhaub feem ntau yog carbon steel, naval tooj dag, lossis tooj liab npib tsib xee nyob ntawm ntug dej hiav txwv. Tube nplooj ntawv feem ntau yog naval tooj dag lossis tooj liab npib tsib xee kom phim cov khoom siv raj.

Q12: C70600 piv rau titanium li cas rau cov cua sov exchangers?

Titanium kav ntev dua tab sis raug nqi 3-5x ntau dua. C70600 yog tus nqi xaiv rau ib txwm muaj. Titanium resists all forms of seawater corrosion, even at high velocity and high temperature. It also does not biofoul. However, titanium is expensive and harder to roll into tube sheets. Use titanium for very aggressive jobs (sand, high velocity >4 m/s, temperature >80 degree). Siv C70600 rau txhua yam ntxiv.

Txhua lub raj batch mus dhau 5 daim tshev ua ntej xa khoom:

Chemistry→ Spectrometer lees paub Ni 9-11%, Fe 1.0-1.8% (ASTM E1473)

Lub zog→ Rub mus kuaj kom txog thaum tawg. Yuav tsum ntaus 310 MPa yam tsawg kawg nkaus (ASTM E8)

Tsis haum→ Eddy tam sim no sojntsuam khiav los ntawm txhua lub raj. Txhua lub teeb liab=tsis lees paub (ASTM E243)

Ductility→ Flatten lub nplhaib rau 3x phab ntsa. Tsis pub muaj kab nrib pleb (ASTM B968)

Leaks→ Hydrostatic siab 3000 psi, tuav rau 10 vib nas this (ASTM B111)

Koj tau txais Daim Ntawv Tshaj Qhia Mill Test nrog txhua qhov kev txiav txim. Kev tshuaj xyuas thib peb (SGS, BV, Lloyds) muaj.

Cov kaus mom yas ntawm ob qhov kawg

VCI daim ntawv nruab nrab ntawm lub raj txheej

Shrink qhwv ib ncig ntawm txhua pob

Steel strapping kom ruaj ntseg pob

Ntoo rooj plaub rau me me txiav lengths los yog fragile ntau thiab tsawg

Hlau pob + ntoo pallet rau 6-12m txheem raj

Waterproof daim ntawv lo nrog qib, OD, phab ntsa, cua sov tooj, kom muaj nuj nqis

Los ntawm raw khoom mus rau lub raj tiav hauv ib tsob nroj:

Melting(3 lub cub tawg, 5 tons txhua) → hloov tooj liab + npib tsib xee + hlau ua kua alloy

Casting(2 kab) → pours kua rau hauv cov khoom billet, 80-220mm txoj kab uas hla

Extrusion(3500 tuj xovxwm) → punches billet rau hauv hollow raj plhaub

Txias daim duab(8 lub rooj zaum) → rub lub plhaub los ntawm qhov tuag kom ntsws OD thiab phab ntsa

Annealing(4 lub qhov cub) → heats tube mus rau 600℃kom muag muag tom qab kos duab

Straightening & txiav(3 kab) → ua lub raj ncaj thiab txiav kom ntev

Kev sim(2 eddy tam sim no tshuab) → 100% tshuaj xyuas

Tshawb xyuas Hnub no Cov Tshuag & Lub Sijhawm Lead