Dab tsi kev lag luam thiab cov liaj teb yog Astm A333 Gr.3 Steel yeeb nkab feem ntau siv rau?
Cov yeeb nkab steel no yog tsim los rau cov khoom siv cryogenic ib puag ncig thiab feem ntau siv hauv cov roj ntsha (LNG), xws li cov chaw lim, liquefaction, thiab cov roj av. Nws tseem dav siv nyob rau hauv cryogenic sib cais chav tsev, khoom siv tub yees, thiab tub yees txias thiab tub yees rau hauv kev lag luam petrochemical. Nws tseem yog cov khoom tseem ceeb hauv kev tso tsheb hlau luam thiab xa xov rau cryogenic kua xws li ua kua nitrogen, kua oxygen, thiab kua argon. Cov ntawv thov muaj peev xwm muaj nyob rau cov khoom no nyob rau ib puag ncig qhov twg cov khoom muaj sia thiab cov khoom sib khi yuav tsum tau tswj hwm ntawm qhov kub -101℃lossis qis dua.
Dab tsi yog qhov kev tsim qauv qis tshaj plaws nws tuaj yeem tiv taus? Vim li cas qhov no puas yog qhov qis tshaj?
The lowest design temperature for ASTM A333 Gr.3 steel pipe is -101℃(-150℃F). Qhov kub no tsis yog txiav tawm tab sis yog txiav txim siab los ntawm cov khoom siv dualile-flittle hloov cov yam ntxwv. Tus qauv no tau txheeb xyuas los ntawm kev ntsuas V-Motch cuam tshuam cov kev cuam tshuam, uas yuav tsum tau tias cov zis uas tau ua raws li cov kev cai ntawm lub zog ntawm -101 degree. Qhov no qhia tau qhov kub thiab txias rau qhov kub thiab txias rau qhov kub thiab txias, cov khoom yuav tsis muaj kev sib tsoo thiab tseem tuaj yeem tswj cov zog txaus kom nqus tau lub zog. Yog li ntawd, -101℃yog qhov qis dua qhov tseem ceeb ntawm kev txwv rau nws cov khoom siv neeg.
Nyob rau hauv Lng Projects, qhov twg yog333 gr.3 cov yeeb nkab hlau feem ntau siv?
A333 Gr.3 plays lub luag haujlwm tseem ceeb hauv kev siv roj liquefied (LNG) kev lag luam saw. Nws feem ntau siv nyob rau hauv cryogenic pipelines txuas liquefaction kab thiab cov tso tsheb hlau luam loj, thauj}} txias lng kua. Ntawm LNG tau txais cov terminals, nws yog siv nyob rau hauv tag nrho cov kav dej piping system, los ntawm cov khoom thauj khoom ntiag tug mus rau chav tso tsheb hlau luam, thiab los ntawm cov tso tsheb hlau luam rau chaw tso tsheb. Nws tseem raug siv rau hauv cov ntawv raj rau lng tank truck lossis cov tso tsheb tso tsheb me. Nws yog cov khoom tseem ceeb uas tau tswj cov dej ntws du ntawm tag nrho cov leeg ntshav "."
Dhau li ntawm qhov kub, yog lwm qhov kev pabcuam lwm yam kev pabcuam yuav tsum tau txiav txim siab?
Dhau li ntawm cov neeg siv kub tsawg, cov neeg tsim qauv yuav tsum tseem xav txog yam xws li siab, corrosive tawm, thiab cyclic loads. Lub siab sab hauv uas cov kav dej yog raug txiav txim siab qhov xav tau phab ntsa tuab thiab qib siab. Thaum Nickel Steel muaj cov kev ua haujlwm zoo heev corrosider tsis kam, SCC) yuav tsum raug ntsuas yog tias cov xov xwm muaj cov tshuaj acid acidic (xws li h ₂). Tsis tas li ntawd, siab hloov pauv lossis kev co ntawm cov chaw xws li cov khoom siv twj tso kua mis tuaj yeem ua rau cov khoom siv nkees ua rau muaj kev phom sij zoo heev. Yog li no, kev xaiv cov khoom siv yog ntau-} qhov kev txiav txim siab - ua cov txheej txheem.
Thaum xaiv A333 Gr.3, yuav ua li cas ib qho kev tshuav nrog nws nrog siab dua- ni steel lossis stainless hlau)?
Cov kev xaiv yog nyob ntawm kev sib xyaw ua ke ntawm kev tsim kub, siab, thiab tus nqi. A333 Gr.3 yog qhov haum rau kev ua haujlwm kub ib ncig -100 degree. Rau qis dua kub (xws li -196℃hauv cov kua nitrogen), ttm A333 Gr.8 (9% ni steel) lossis xws li 304L) yuav tsum tau siv. Thaum Stainless Hlau thiab 9% Ni steel muaj kev ua tau zoo dua, lawv kuj tseem kim dua gr.3. Yog li ntawd, yog tias cov qauv tsim nyog tau ua tau ntsib, Gr.3 yog qhov kev xaiv lag luam tshaj plaws. Cov kws tsim khoom yuav tsum nrhiav qhov zoo tshaj plaws ntawm kev ua tau zoo txog kev ua tau zoo txog kev ua tau zoo thiab phiaj xwm tus nqi.
