Copper -Nickel Seamless Tube Nyob rau hauv ASME SB111 / B111M
ASME SB111 thiab nws cov metric tus khub B111M yog qhov tshwj xeeb rau seamless tooj liab thiab tooj liab alloy raj rau nto condensers, evaporators thiab tshav kub exchangers, thiab lawv yog technically zoo tib yam rau ASTM B111 thiab B111M. Tus qauv npog ob qho tib si tooj liab- qib nickel siv rau kev pabcuam hauv hiav txwv thiab fais fab nroj tsuag thiab cov tooj dag thiab txhuas brasses siv qhov dej chemistry tsawg dua.
Cov tooj liab -nickel alloys hauv qhov tshwj xeeb yog 90/10 thiab 70/30 cov khoom sib xyaw, ua ke nrog cov chromium- qib bearing tsim rau cov dej hiav txwv siab dua. Hlau thiab manganese yog txhob txwm muab ntxiv rau hauv cov alloys ntau dua li cov khoom seem: tsis muaj lawv cov yeeb yaj kiab tiv thaiv uas ua rau cov hlau tsis muaj zog hauv cov dej hiav txwv ntws tsis zoo, thiab cov tshuaj tiv thaiv corrosion uas qib raug xaiv tau poob. Qhov no yog vim li cas cov hlau ntau hauv tus qauv yog lub qhov rais tswj thiab tsis yog qhov siab tshaj plaws.
Qib thiab tshuaj yuav tsum tau muaj
| Qib | Tsev neeg | Tswj kev ntxiv | Hom dej num |
|---|---|---|---|
| C70600 | 90/10 tooj liab -nickel | 9.0–11.0%, Fe 1.0–1.8%, Mn txog 1.0% | seawater piping, condensers, tshav kub exchangers |
| C70620 | 90/10 tooj liab-nickel, welded-tube version | Raws li C70600 nrog cov seem seem thiab tsis muaj txhuas ntxiv | systems qhov twg tsawg -lead chemistry yuav tsum tau |
| C71500 | 70/30 tooj liab -nickel | Ni 29.0–33.0%, Fe 0.4–1.0%, Mn txog 1.0% | nrawm dua thiab nruj dua dej hiav txwv |
| C72200 | tooj liab-nickel-chromium | Cr ntxiv nrog npib tsib xee thiab hlau | siab- dej hiav txwv ceev, xuab zeb- dej hiav txwv |
| C68700 | aluminium tooj dag | Al 1.8-2.5% nrog arsenic inhibitor | huv seawater condensers, nqi -sensitive luag hauj lwm |
Kev txwv kev txwv thiab kev tso cai rau txhua lub ntsiab lus tau teev nyob rau hauv tus qauv, thiab txhua qib tau muab rau hauv ntau lub sijhawm. Cov tempers annealed muaj qhov siab tshaj plaws ntawm cov nplej- qhov xav tau loj ntxiv nrog rau cov kev xav tau tensile, vim tias cov nplej loj tswj hwm lub peev xwm ntawm lub raj kom nthuav dav rau hauv cov ntawv raj thiab khoov rau hauv U-zoo li tsis tawg.
Seamless tooj liab-nickel yeeb nkab - txoj kab uas hla loj dua nyob rau hauv cov phab ntsa hnyav dua thiab nrog cov yeeb nkab- hom qhov ntev - yog teev cais raws li ASTM B466 / B466M. Cov ntaub ntawv uas tsis yog raj, suav nrog phaj, ntawv thiab sawb rau cov ntawv raj thiab lub thawv dej, yog them los ntawm tooj liab -nickel phaj thiab daim ntawv qauv, yog li qhov ua tiav seawater system feem ntau yog tsim los ntawm ntau tshaj ib qho kev qhia tshwj xeeb.
Seawater Corrosion Performance
Kev tiv thaiv zaj duab xis tsim:nyob rau hauv cov dej hiav txwv ntws, lub alloy tsim ib tug nyias, adherent corrosion- cov khoom zaj duab xis uas muaj hlau, npib tsib xee thiab tooj liab, uas txwv tsis pub ntxiv hlau poob. Cov ntsiab lus hlau ntawm cov hlau yog qhov ua rau cov yeeb yaj kiab no ruaj khov, thiab cov yeeb yaj kiab xav tau qhov tsawg kawg nkaus khiav nrawm thiab txaus oxygen los tsim thiab nyob twj ywm.
Velocity ntau:tooj liab-nickel raj muaj lub qhov rai tsim qhov nrawm. Hauv qab no, daim ntawv tso nyiaj thiab tsim nyob rau hauv - tso nyiaj tawm tsam; saum toj no, zaj duab xis yog mechanically tshem tawm thiab yaig -corrosion pib. Lub qhov rais yog teem los ntawm alloy thiab dej chemistry thiab yog teev los ntawm cov nroj tsuag designer.
Sulphide thiab pollution resistance:tooj liab-nickel alloys ua rau muaj kuab paug thiab sulphide- bearing seawater deb zoo dua li cov tooj dag, uas yog lub ntsiab yog vim li cas lub chaw nres tsheb fais fab nrog estuary dej txias qhia lawv es tsis txhob ntawm admiralty tooj dag.
Ammonia thiab kev ntxhov siab -corrosion:cov tooj liab-nickel alloys muaj qhov tiv taus ntau dua rau ammonia-txog kev ntxhov siab- corrosion cracking tshaj qhov siab -zinc brasses, uas tseem ceeb hauv cov nroj tsuag uas muaj cov tshuaj ammoniacal nyob rau ntawm chav dej.
Biofouling:cov alloys tso tawm tooj liab ions ntawm tus nqi qis thiab inhibit marine kev loj hlob, ua kom kub hloov mus ze rau tus nqi tsim ntawm kev ntxuav.
Daim ntawv thov
Lub zog cog condenser:lub ntsiab condensers thiab auxiliary coolers nyob rau hauv ntug dej hiav txwv thiab estuarine chaw nres tsheb, qhov twg cov dej txias yog seawater los yog brackish thiab lub raj yuav tsum kav lub neej ntawm chav tsev.
Marine thiab offshore:seawater piping, txias tshuab, cua txias, lubricating roj thiab tsho dej txias, thiab loj - ntim seawater systems ntawm cov hlab ntsha thiab platforms.
Desalination:brine rhaub, theem rov qab cua sov thiab condenser seem hauv ntau- theem flash thiab rov qab osmosis nroj tsuag.
Shipbuilding hardware:cov ntaub ntawv raj, lub thawv dej, ntsev- dej fittings, lub tes tsho kiv cua, lub cev thiab cov khoom siv hauv qhov chaw uas yuav tsum muaj tooj liab -nickel nto.
Txheej txheem thiab refinery:exchangers thiab coolers nyob rau hauv refineries thiab tshuaj nroj tsuag uas lub txias sab yog seawater thiab cov txheej txheem sab yog hydrocarbon los yog cov txheej txheem kua.
Thaum tshav kub kub-exchanger tube:qhov tseem ceeb ntawm kev siv tus qauv, nyob rau hauv ntev ntev rau lub plhaub - thiab - raj exchangers thiab hauv U- daim ntawv khoov rau cov bundles tshem tau.
Fabrication, Installation thiab Inspection Points
Annealed raj ua ntej expansion:raj nthuav dav rau hauv ib daim ntawv raj yuav tsum yog nyob rau hauv lub annealed mob nrog grain loj nyob rau hauv tus txheej txheem txwv, txwv tsis pub cracking tshwm nyob rau hauv lub dov sib koom.
Kev ntxhov siab tom qab U- khoov:kev nyuaj siab-relief anneal tom qab txias dabtsi yog khoov txo qhov kev ntxhov siab uas seem thiab qhov kev pheej hmoo ntawm kev pabcuam tawg hauv qhov khoov.
Tsis txhob sib tov cov khoom siv galvanically:tooj liab-nickel raj hauv lub thawv dej steel tsim ob peb galvanic, yog li lub thawv dej thiab cov ntawv raj feem ntau tiv thaiv nrog cov txheej lossis nrog cov anodes, thiab cov qauv tsim ua raws li cov nroj tsuag corrosion- tshwj xeeb tiv thaiv.
Cleanness thaum lub sij hawm installation:embedded hlau hais los ntawm cov cuab yeej steel los yog cov khib nyiab qias neeg ua rau cov yeeb yaj kiab tiv thaiv hauv zos thiab pib pitting; siv cov cuab yeej uas tsis yog-ferrous lossis stainless hlau thiab npog lub raj kawg.
Tsis yog-kev kuaj xyuas kev puas tsuaj:eddy-tam sim no kev sim ntawm tag nrho ntev tom qab qhov kawg anneal yog thawj qhov kev lees paub, ntxiv los ntawm tensile thiab grain- qhov ntsuas qhov loj rau qhov kev txiav txim siab thiab kev sim hydrostatic lossis pneumatic thaum xav tau los ntawm kev txiav txim.
Cia thiab thauj:raj yog kawg-capped, qhuav thiab bundled rau ntawm ntoo pallets los yog nyob rau hauv lub crates muaj zog yog li lub bore tsis muaj dej noo thiab paug thaum tuaj txog.
FAQ
Q: Qhov txawv ntawm ASME SB111 thiab ASTM B111 yog dab tsi?
Ob cov ntaub ntawv yog technically zoo tib yam. ASTM B111 yog thawj cov ntaub ntawv tshwj xeeb thiab ASME SB111 yog ASME tsab saws rau siv nrog lub boiler thiab siab hlab ntsha thiab cov kav dej.
Q: Vim li cas 90/10 thiab 70/30 tooj liab-nickel alloys muaj hlau?
Hlau yog ntxiv txhob txwm tshaj tawm, nyob rau hauv ib qho kev tswj hwm, vim hais tias nws yuav tsum tau tsim thiab stabilize cov yeeb yaj kiab tiv thaiv uas txwv tsis pub corrosion hauv dej hiav txwv ntws. Yog tsis muaj hlau txaus, alloy poob ntau ntawm nws cov seawater kev ua tau zoo.
Q: Thaum twg yuav tsum tau xaiv C71500 hloov C70600?
Qib 70/30 raug xaiv rau cov dej hiav txwv siab dua, cov dej ntxhia ntau dua lossis muaj kuab paug thiab qhov muaj zog tiv thaiv kev yaig ntau dua - xav tau corrosion. Qib 90/10 yog qhov txaus thiab pheej yig dua rau cov dej hiav txwv huv huv ntawm qhov nrawm nrawm.
Q: Puas yog tooj liab -nickel raj tuaj yeem welded?
Yog lawm, nws welds zoo los ntawm cov roj tungsten arc thiab roj hlau arc txheej txheem nrog cov muab tub lim, thiab welded raj hauv C70620 chemistry yog tsim rau cov kev pabcuam tshwj xeeb. Seamless raj tseem yog tus qauv rau lub luag haujlwm tseem ceeb ntawm condenser.
Q: Dab tsi temper yuav tsum tau hais kom condenser retube xaj?
Annealed raj nrog grain loj nyob rau hauv tus qauv txwv rau cov hlau, uas tso cai rau cov menyuam expansion rau hauv lub raj ntawv thiab txias forming ntawm ib tug U- khoov yam tsis muaj cracking. Daim ntawv pov thawj yuav tsum tau hais ob qho tib si tensile tau thiab grain loj.
Q: Lub raj rau lub seawater exchanger kuaj ua ntej xa khoom xa tuaj?
Tag nrho -ntev eddy- kev tshuaj xyuas tam sim no tom qab qhov kawg anneal, kev ntsuas tensile ntawm cov qauv, cov nplej- ntsuas qhov loj me ntawm cov raj annealed, ntsuas qhov ntev ntawm sab nraud txoj kab uas hla, phab ntsa thickness thiab ovality, thiab kev ntsuas siab qhov twg qhov kev txiav txim yuav tsum muaj ib qho.
