1. Kev ntsuam xyuas puv ultrasonic (ut) rau tuab ntau dua lossis sib npaug rau 15 hli
Yuav Tsum Tau Txais:
100% automated rau kev ntsuas yog yuav tsum tau ua rau cov phiaj hlau ntau dua lossis sib npaug rau ntawm 15mm tuab siv nyob rau hauv Hull cov qauv, lawj, thiab cov kev ntxhov siab ntau.
Cov Ntsiab Lus Tseem Ceeb:
Scanning Txoj Kev: Shear-Wave siv (45℃-70℃kev sojntsuam) rau kev ntsuas qhov khuam kom paub.
Calibration cov qauv: Siv IIW lossis DSC thaiv nrog cov qhov sab-dred uas (SDH) rau kev hloov kho kom zoo.
Kev lees paub lees paub cov txheej txheem:
No linear indications >50 hli nyob rau hauv ntev.
No cluster defects (>3 Qhov taw qhia tsis pub dhau 100mm²).
Kev Tshaj Tawm: Cov ntaub ntawv yuav tsum suav nrog scan maps, tsis meej lub cav, thiab cov neeg teb xov xwm pov thawj.
Vim li cas tseem ceeb?
Txwv tsis pub lamination qhov tsis xws luag uas tuaj yeem ua rau kev puas tsuaj loj hauv cov phiaj hnyav.
2. Weld tshuaj xyuas: ut + rt rau tag nrho cov pob qij txha nkag siab
Yuav Tsum Tau Txais:
Taub qab Welds hauv thawj cov qauv (piv txwv li, hull seams, bulkheads) yuav tsum tau:
100% siv rau tuab ntau dua lossis sib npaug rau 10 hli.
10% random rt (ntsuas phoo ntawv ntsuam xyuas) raws li kev txheeb xyuas cov ntoo khaub lig.
Cov qauv kev lees txais:
Cov kev tsis pom zoo siv tsis lees txais yog tias:
Cracks or lack of fusion >6 hli nyob rau hauv ntev.
Porosity clusters >4 hli nyob rau hauv diam.
RT tsis pom zoo tsis lees txais yog tias:
Slag inclusions >4% ntawm weld tuab.
Sab hauv cov kab nrib pleb ntawm txhua qhov loj me.
Cov kev tshaj lij:
Phased-array ut (Paut) nyiam rau kev ua si geometries.
Zaj duab xis lossis digital screadgebraphy (DR) tso cai rau RT.
3. Post-Weld Kev Kho Mob Kub (PWHT) Kev Tshawb Xyuas ntawm Hardness Testing
Yuav Tsum Tau Txais:
Hardness testing (HV10) is mandatory after PWHT for thickness >50 hli los tiv thaiv kom thaiv hydrogen cracking.
Kuaj xyuas raws tu qauv:
Vickers hardness txwv:
Tsawg dua los yog sib npaug rau 350 hv10 rau cov pa roj carbon-manganese.
Tsawg dua los yog sib npaug rau 380 HV10 rau cov siab-zog qis-alloy (hsla) cov hlau.
Kev ntsuas zaus: 1 sim ib zaug ntawm Weld ntev.
Koom haum NDT:
Zas kev sim tshuaj ntsuam (PT) yog tias nyuaj tshaj txwv.
Vim li cas tseem ceeb?
Ua kom peb pab Weld Haz tawv tawv thiab tiv thaiv kev ntxhov siab corrosion (SCC).
4. Thickness ntsuas & corrosion closing rau hauv-kev pabcuam nkoj
Yuav Tsum Tau Txais:
Ultrasonic thickness gauging (utg) yog qhov yuav tsum tau nyob rau hauv cov kev tshawb fawb tshwj xeeb (5-xyoo rov ua ntawv rov ua dua tshiab).
Soj ntsuam cov chaw:
Ballast tso tsheb hlau liab, Cargo tuav, thiab dej hiav txwv kav dej.
Cov tswv cuab tseem ceeb (piv txwv li, lub vev xaib, cov tsiaj qus ntev).
Cov txheej txheem lees txais:
Yam tsawg kawg nkaus seem tuab tuab=75% ntawm thawj (lossis xws li ib tus abs safehull txwv).
Corrosion rate >0.3mm / xyoo ua chiv txheej txhim kho kev soj ntsuam.
Qhia:
Cov ntawv qhia tuab digital tuab yuav tsum muab xa mus rau qhov tsis tuaj yeem tshuaj xyuas.
5. Ntxiv NDT rau cov ntawv thov tshwj xeeb (IC-chav kawm, LNG Carrers)
Yuav Tsum Tau Txais:
Sib nqus partle kuaj (MT) rau cov dej khov-cov vessels (piv txwv li ABS A5, PC3).
Ua kua rau kev kuaj ua kua (PT) rau cov hlau stainless lng muaj cov tshuab.
Cov Ntaub Ntawv Tshwj Xeeb:
100% mt rau fillet welds nyob rau hauv cov chaw dej khov.
Cryogenic cuam tshuam kev xeem xeem xeem rau lng tank cov ntaub ntawv.
