Yog vim li cas Standard Carbon Steel ua tsis tau tejyam nyob rau hauv Basra lub Refinery ib puag ncig
Lub Basra refinery nthuav dav nyob rau yav qab teb Iraq yog ib feem ntawm lub teb chaws thoob plaws lub zog los txhawb nqa tag nrho cov peev txheej refining mus rau 1.3 txog 1.65 lab barrels ib hnub twg thiab txo nqi roj ntshuam. Kev tsim kho tau txav mus tom ntej hauv theem, thiab yuav luag txhua theem tau khiav mus rau tib qhov teeb meem. Ib puag ncig hauv zos rau txim rau cov pa roj carbon zoo tib yam.
Basra zaum ntawm sab qaum teb kawg ntawm Persian Gulf. Qhov kub nruab hnub tsis tu ncua hla 45℃thaum lub Rau Hli thiab Lub Yim Hli. Sandstorms nqa abrasive particulate uas scours raug hlau nto. Cov khoom siv raw ntawm no yog siab-sulfur, thiab cov chav ua kom zoo dua tso tawm hydrogen sulfide (H₂S) nrog rau cov roj acidic xws li SO₂ thiab CO₂. Cov dej noo los ntawm Gulf ntug dej hiav txwv ntxiv cov txheej txheem electrolyte uas ua kom cov electrochemical corrosion.
Thaum thawj theem nthuav dav, tus qauv A36 carbon steel tau siv rau hauv cov txheej txheem piping, cia tank sab hauv, thiab kev txhawb nqa. Cov txiaj ntsig tau kwv yees tab sis kim. Pitting tshwm nyob rau hauv lub hlis. Phab ntsa thickness poob tshaj qhov project qhov kev lees paub thaum lub sij hawm niaj hnub tshuaj xyuas ultrasonic. Kev kaw tsis tau npaj tseg rau kev hloov seem tau dhau los ua qhov xwm txheej peb lub hlis twg, thiab txhua qhov kev nres tau txhais tau tias poob ntau lawm ntxiv rau kev yuav khoom thaum muaj xwm txheej ceev ntawm tus nqi hwm.
Pab pawg ua haujlwm, kev sib koom ua ke ntawm Iraqi lub xeev refinery tus neeg teb xov tooj thiab tus neeg ua haujlwm thoob ntiaj teb EPC, tau pib tshawb nrhiav cov khoom siv coil nrog cov pov thawj kev paub hauv Middle East hydrocarbon ib puag ncig. Lawv cov kev xav tau tshwj xeeb. Cov hlau xav tau los tiv thaiv H₂S-induced sulfide stress cracking thiab acidic corrosion. Nws yuav tsum zam qhov kub txhua hnub ntawm 30℃lossis ntau dua yam tsis muaj txheej txheej delamination. Cov neeg ua haujlwm hauv cheeb tsam xav tau kev weldability zoo, qhov zoo tshaj plaws yam tsis muaj ua ntej - cua sov, vim tias ntawm - qhov chaw ua haujlwm preheat hauv 45℃cua sov tau qeeb thiab ua rau muaj kev txhawj xeeb txog kev nyab xeeb. Kev xa khoom yuav tsum ua raws li EPC tus tswv lub sijhawm, thiab txhua yam khoom yuav tsum tau ua raws li cov qauv kev thauj mus los hauv hiav txwv kom tuaj txog ntawm qhov chaw nres nkoj Basra.
Customized Weathering Steel Coils Ua rau Basra's Crude thiab Kev nyab xeeb
Shandong Pinjie Cov Khoom Siv Tshiabtau tsim thiab xa tawmsteel coilsrau ntau tshaj kaum xyoo, nrog rau cov npe loj hlob hauv Middle East cov haujlwm roj thiab roj. Thaum qhov kev nug Basra tuaj rau hauv, peb tsis tau hais ib yam khoom catalog. Peb tau nug ua ntej rau lub vev xaib cov ntaub ntawv tsis txaus ntseeg thiab cov ntaub ntawv huab cua, tom qab ntawd ua haujlwm rov qab rau cov khoom siv tshwj xeeb.
Lub coil peb npaj yog ahuab cua, atmospheric corrosion-resistant steelRaws li ASTM A588 Qib B chemistry, ua ke nrog akub-dip galvanizedsubstrate thiab peb - txheej txheej txheej. Lub hauv paus chemistry suav nrog kev tswj hwm ntxiv ntawm chromium ntawm 0.40 txog 0.70 feem pua, npib tsib xee ntawm 0.20 txog 0.50 feem pua, thiab tooj liab ntawm 0.25 txog 0.55 feem pua. These elements promote the formation of a dense, adherent patina layer on the steel surface when exposed to alternating wet and dry cycles. Cov patina ntawd ua ib qho kev thaiv uas ua rau qeeb oxidation ntxiv. Cov pa roj carbon steel, los ntawm qhov sib txawv, ua rau cov xeb xeb uas flakes tawm thiab nthuav tawm cov hlau tshiab rau lub voj voog corrosion tom ntej.
Nyob rau sab saum toj ntawm lub substrate peb siv peb - txheej txheej txheej. Thawj txheej yog chromate -kev kho mob dawb passivation uas txhim kho adhesion ntawm zinc thiab cov organic txheej. Qhov thib ob yog epoxy primer ntawm kwv yees li 5 mus rau 8 μm qhuav zaj duab xis tuab, xaiv rau nws cov tshuaj tiv thaiv rau H₂S thiab acidic condensates. Lub topcoat yog PVDF, polyvinylidene fluoride, tiav ntawm 18 mus rau 22 μm DFT, xaiv rau nws UV stability nyob rau hauv lub hnub ci muaj zog thiab nws tsis kam mus chalking thiab yaig los ntawm cua- tshuab xuab zeb. Tag nrho cov txheej tuab ntawm cov txheej tiav yog li ntawm 23 txog 30 μm ib sab.
Cov khoom siv kho tshuab tau raug kho raws li qhov project tus qauv tsim thiab kev tsim khoom xav tau. Cov coils muab tau raws li qhov tsawg kawg nkaus lub zog ntawm 345 MPa thiab tensile zog ntawm 490 thiab 620 MPa, nrog elongation ntawm tawg ntawm 22 feem pua los yog siab dua. Cov pa roj carbon sib npaug, CEV, tau tuav qis dua 0.45 feem pua, uas tso cai rau lub chaw vuam pawg ua haujlwm ntawm cov hlau arc thiab GMAW vuam yam tsis muaj ua ntej - cua sov rau thicknesses txog 12 hli. Qhov ntawd yog lub ntsiab lus ntawm -qhov kev ua tau zoo ntawm qhov chaw. Coil thicknesses muab los ntawm 1.5 hli rau lub tank hauv ob sab phlu rau 6.0 hli rau cov qauv kev txhawb nqa.
Ua ntej ua zaub mov xa tuaj, peb tau khiav ceev cov kev kuaj sim replicating Basra tej yam kev mob. Kev ntsuas ntsev ntsev ua raws li ASTM B117 rau 1,000 teev, nrog rau kev ntsuas kev sib tw ntxiv nrog cov av noo, ntsev pos huab, thiab qhuav - cua sov caij ntawm 50℃. Covweathering steel coilspom qhov nruab nrab corrosion tus nqi kwv yees li 70 feem pua qis dua li cov pa roj carbon A36, thiab pitting ceev tom qab 20 CCT cycles raug txo los ntawm ntau tshaj ib nrab. Cov txheej txheem txheej dhau ASTM D3359 hla-hatch adhesion kuaj ntawm 5B uas tsis muaj flaking, thiab tsis pom kev delamination tom qab 500 teev ntawm UV condensation raug rau ASTM D4587.
Cov coils raug ntsia thoob plaws peb thaj chaw thov. Cov txheej txheem cov kav dej hauv chav tsev desulfurization, sab hauv ob sab hauv ntawm ob lub tso tsheb hlau luam atmospheric, thiab cov qauv kev txhawb nqa rau cov yeeb nkab racks hauv lub tank ua liaj ua teb.
Kev tsim khoom, tshuaj xyuas, thiab kev txiav txim sai sai
Kev tsim khoom tau khiav ntawm 20- hnub teem sijhawm los ntawm kev lees paub qhov kev txiav txim. Txhua pawg tau dhau los ntawm peb hauv - kev tshuaj xyuas zoo hauv tsev ua ntej xa. Peb tau soj ntsuam cov txheej txheej ntawm kev sib tsoo ntawm kev sib tsoo, qhov tseeb qhov tseeb nrog tuab kam rau ua ntawm ± 0.05 hli thiab dav kam rau ua ntawm ± 2 hli, thiab cov khoom sib xws los ntawm spectrometer pov thawj ntawm txhua qhov cua sov. Mill daim ntawv pov thawj tau muab rau EN 10204 3.1 rau txhua kauj.
Tag nrho cov khoom xa tuaj thawj zaug tau thauj khoom tsib hnub ua ntej hnub cog lus xa khoom. Peb npaj kev thauj khoom hiav txwv ntawm txoj kev Middle East, nrog lub sijhawm thauj mus los ntawm kwv yees li 18 txog 22 hnub mus rau Umm Qasr chaw nres nkoj, ua raws li kev thauj mus los hauv hiav txwv mus rau Basra. Cov ntim khoom suav nrog VCI, tsis muaj zog corrosion inhibitor, ntawv interleaving ntawm coils, ntug tiv thaiv, thiab cov ntaub thaiv dej tsis zoo los tiv thaiv cov av noo thiab ntsev cua thaum lub sij hawm ntau - lub lis piam voyage.
Yim lub hlis ntawm kev ua haujlwm tas li hauv Basra
Cov coils muab tam sim no tau ua haujlwm tas li rau ntau tshaj yim lub hlis hauv Basra units. Ua raws li- kev tshuaj xyuas, ua los ntawm EPC pab neeg kev ncaj ncees siv ultrasonic thickness gauging thiab kev ntsuam xyuas qhov muag pom, kaw qhov nruab nrab phab ntsa thinning hauv qab 0.1 hli thoob plaws txhua qhov chaw saib xyuas. Pitting was present but markedly less dense and shallower than in the carbon steel sections installed during the first expansion phase. Tsis muaj txheej txheej delamination lossis blistering tau pom ntawm ib qho PVDF-coated nto.
Cov txiaj ntsig no txhais ncaj qha rau hauv cov txiaj ntsig kev ua haujlwm. Lub chaw ua haujlwm tau sau tseg xoom corrosion- cuam tshuam txog kev kaw tsis tau npaj tseg hauv cov units uas siv peb cov coils thaum lub sijhawm tshaj tawm, piv nrog qhov nruab nrab ntawm ib qho kev kaw txhua 90 hnub hauv cov pa roj carbon steel. Lub sijhawm tu ncua tau txuas ntxiv, thiab pab pawg pabcuam kev ntseeg siab tau hloov kho lawv qhov kev hloov pauv huab cua poob qis. Lub refinery txuas ntxiv mus rau nws lub hom phiaj lub peev xwm lub npe nrog qis dua qhov xav tau ntev - cov nqi ua haujlwm.
Kev tshuaj xyuas tseem tsis tu ncua. Peb tau txais cov ntaub ntawv tuab ntawm peb lub hlis twg los ntawm qhov chaw, thiab peb pab pawg kws tshaj lij tshuaj xyuas cov txiaj ntsig los kho cov lus pom zoo txheej txheej rau cov theem tom ntej. Tsis muaj cov khoom ua tau zoo tag nrho mus ib txhis, thiab peb nyiam taug qab qhov nkhaus ntawm qhov degradation tiag tiag es tsis yog cia siab rau qhov kev kwv yees hauv ib leeg.
Cov lus nug nquag
Dab tsi steel qib yog pom zoo rau refinery piping raug rau H₂S?
Rau atmospheric thiab me ntsis acidic refinery ib puag ncig,huab cua steelsxws li ASTM A588 nrog rau qhov tsim nyog galvanized thiab PVDF txheej txheej muaj qhov sib npaug ntawm corrosion kuj, weldability, thiab nqi. Rau cov kev pabcuam qaub hnyav nrog siab H₂S ib nrab siab, cov pa roj carbon steel nrog NACE MR0175 / ISO 15156 ua raws lossis corrosion-cov alloys resistant tej zaum yuav tsum tau. Qhov kev xaiv zoo yog nyob ntawm qhov kev ntsuam xyuas tshwj xeeb, kev ua haujlwm kub, thiab H₂S concentration.
Puas yog huab cua steel coils tuaj yeem welded yam tsis tau ua ntej - cua sov?
Yog lawm, thaum cov pa roj carbon sib npaug tswj tau qis dua li ntawm 0.45 feem pua. Cov coils muab rau Basra qhov project tswj CEV qis dua 0.45 feem pua, tso cai rau kev tuav cov hlau arc thiab GMAW vuam yam tsis muaj ua ntej- cua sov rau ntu tuab txog li 12 hli. Rau cov ntu tuab lossis cov pob qij txha uas muaj zog heev, qis - kub ua ntej - cua sov kuj tseem yuav tsum tau los ntawm cov txheej txheem vuam tshwj xeeb.
Dab tsi txheej txheej tiv thaiv UV degradation thiab xuab zeb yaig hauv Middle East?
Lub PVDF topcoat tshaj ib qho epoxy primer ntawm kub -dip galvanized substrate yog ib qho kev sib txuas ua ke zoo tshaj plaws rau Middle East sab nraum zoov raug. PVDF muaj UV ruaj khov thiab chalk tsis kam, epoxy primer muab tshuaj tiv thaiv, thiab zinc txheej muab kev tiv thaiv cathodic. Rau cov cheeb tsam uas muaj cov xuab zeb loj heev, cov yeeb yaj kiab PVDF tuab dua 20 μm lossis cov tsho loj polyurethane nruab nrab tuaj yeem txuas ntxiv lub neej.
Qhov kev pab cuam lub neej yog dab tsianti-corrosion steel kaujnyob rau hauv lub refinery?
Kev pabcuam lub neej nyob ntawm kev ua haujlwm, txheej txheej txheej, thiab kev saib xyuas. Hauv daim ntawv thov Basra cov coils tau ua rau ntau tshaj yim lub hlis nrog tsawg dua 0.1 hli phab ntsa thinning thiab tsis muaj txheej tsis ua hauj lwm. Raws li cov ntaub ntawv ntsuas nrawm thiab sib piv Middle East cov ntaub ntawv, ib qho kev qhia kom raug thiab khaws cia feem ntau tuaj yeem xa 8 mus rau 12 xyoo kev pabcuam ua ntej txheej txheej loj refurbishment, kwv yees li 2 mus rau 3 zaug ntawm kev pabcuam lub neej ntawm uncoated carbon steel nyob rau tib qhov chaw.
Npaj txhij rau koj qhov project refinery?
Yog tias koj qhov project refinery lossis hydrocarbon nyob rau hauv Middle East ntsib cov teeb meem zoo sib xws, kub kub, tshuab xuab zeb, H₂S, thiab acidic corrosion, peb tuaj yeem pab. Shandong Pinjie Cov Khoom Siv Tshiab npaj cov kev cai los tiv thaiv -corrosion steel coil npaj npaj raws li koj qhov chaw soj ntsuam tsis zoo, cov ntaub ntawv huab cua, thiab kev tsim khoom. Thov ib daim ntawv qhia tshwj xeeb lossis nug rau qhov kev tsocai, thiab peb pawg kws tshaj lij yuav teb tsis pub dhau ob hnub ua haujlwm.
