Cov - cov kev pheej hmoo siab no xav tau ntau dua li cov npe ntawm cov khoom siv dav dav. Kev xaiv Empirical pib nrog kev kuaj daim coupon cov ntaub ntawv thiab nyob rau hauv -situ ultrasonic thickness mapping kos los ntawm NACE MR0175 qaub- cov lus qhia kev pab thiab cog- cov txheej txheem tshwj xeeb-kwj tshuaj ntsuam xyuas. Kev sib txhuam tsis sib xws, pitting, crevice nres, thiab kev ntxhov siab- corrosion cracking txhua teb txawv rau chromium, molybdenum, thiab npib tsib xee cov ntsiab lus, yog li ib tug graded matrix ntawm coated thiab stainless cov khoom yuav tsum es tsis yog ib tug "zoo tshaj" qib.
Rau cov txheej txheem piping thiab cov hlab ntsha tuav cov kua qaub los yog cov tshuaj chloride-cov kab mob qis dua 60 degree, 316L austenitic stainless (2–3 % Mo) tsis tu ncua ua tau zoo tshaj 304L hauv pitting-kev sib npaug sib npaug (PREN) kuaj; prepainted versions ntawm qib no txuas ntxiv atmospheric durability ntawm sab nraud. Qhov twg muaj zog dua thiab cov tshuaj chloride SCC kuj xav tau- raug cua sov- sib pauv plhaub los yog tawm ntug dej hiav txwv - cov nyob ib sab -duplex 2205 (UNS S32205) muab cov khoom muaj zog nyob ze 450 MPa thaum tuav PREN qhov tseem ceeb ntawm 34–36. H₂S lossis oxidizing -cov kev pabcuam kua qaub hloov pauv mus rau cov nickel alloys lossis titanium, tab sis ntau cov qauv thiab cladding daim ntaub ntawv tseem muaj kev lag luam los ntawm kub-dip galvanized coils (Z180–Z275 txheej) lossis 55 % Al{22}}Znites substrates barrier-ntxiv rau- kev tiv thaiv kev txi raug suav hais tias nyob rau hauv ISO 12944 CX marine- kev sim huab cua. Xim-coated galvanized thiab galvalume coils ntxiv cov organic topcoats uas tiv taus acid- nag thiab alkaline ntxuav-down ib puag ncig ib puag ncig cov tsev reactor.
Rhiav adaptation ua raws cov txheej txheem zoning. Acid-chaw cia thiab nruab nrab thaj chaw nyiam 316 prepainted stainless coil rau tso tsheb hlau luam thiab ducting; siab -kub rauv- cov qauv uas nyob ib sab siv hnyav dua- ntsuas galvanized lossis galvalume ntawv rau kev txhawb nqa thiab cladding; txias- dej thiab hluav taws xob txoj hauv kev txais cov txheej txheem galvanized coil qhov twg H₂S ib nrab siab nyob qis. Txoj kev zoning no, tau lees paub thoob plaws hauv ntau lub tebchaws Suav ntug hiav txwv thiab Middle Eastern cov nroj tsuag, zam dhau - kev qhia tshwj xeeb thaum txwv kev ua tsis tiav hauv cheeb tsam ntawm flanges thiab welds.
Kev nyab xeeb thiab kev tswj hwm kev ua raws cai so ntawm cov ntaub ntawv khaws tseg traceability thiab kev saib xyuas tsis tu ncua. NACE MR0175 / ISO 15156 daim ntawv pov thawj rau kev pabcuam qaub, ua ke nrog kev tshawb fawb ultrasonic thiab kev tshawb nrhiav hauv online, ua rau muaj kev pheej hmoo seem nyob rau hauv qhov kev lees paub. Cov nroj tsuag uas siv cov matrix no qhia tsawg dua cov xwm txheej thiab cov sijhawm ntev ntawm kev hloov pauv, hloov cov khoom siv rau hauv kev ntsuas kev ncaj ncees tau txais txiaj ntsig.
Rau qhov project-cov lus qhia tshwj xeeb coil sib phim rau acid concentration, kub, thiab H₂S qib, tshuaj xyuas qhov muaj316 prepainted stainless hlau kauj, kub-dip galvanized steel kauj, prepainted galvanized steel kauj, thiabgalvalume xaiv rau ntug hiav txwv dej thiab kev lag luam raug. Hu rau pab pawg kws tshaj lij nrog cov ntaub ntawv txheej txheem kom tau txais cov lus hais thiab daim ntawv pov thawj zeb.
