A333 Gr.9 Cov Yeeb Nkab Siv Hauv Liquefied (LNG)?
A333 Gr.9 Cov Yeeb Nkab Steel ua lub luag haujlwm tseem ceeb hauv LNG kev lag luam saw. Lng yog khaws cia thiab thauj ntawm qhov kub nyob ib ncig ntawm{{16}} 162 Qib, tab sis muaj kev sib txuas lus sib luag ntawm {Qib, uas yog qhov kev ua haujlwm zoo tagnrho rau Gr.9 Hlau. Nws yog feem ntau siv rau cov txheej txheem cryogenic txheej txheem hauv cov thawv qoob loo, thiab kev sib kis cov thawv txias ntawm cov thawv txias. Nws txoj kev ntseeg tau nyuaj zuj zus ntawm cov chaw muaj kev nyab xeeb thiab kev ua haujlwm kub ntawm cov chaw kub heev, tiv thaiv kev puas tsuaj uas tsis tshua muaj tshwm sim los ntawm brittle backstre.
Cov khoom siv twg hauv kev lag luam petrochemical siv A333 gr 9 steel yeeb nkab?
Muaj ntau cov txheej txheem cryogenic sib cais hauv cov petrochemical kev lag luam yuav tsum A333 Gr.9 cov yeeb nkab steel. Piv txwv li, hauv kev kwv yees cov nroj tsuag, demelhanizers thiab deethanizers siv los cais ethylene, thiab rov ua haujlwm ntawm qhov kub thiab txias li -100℃lossis hauv qab no. Ib yam li ntawd, Gr.9 yog cov khoom siv uas nquag muaj kev xaiv rau cov txheej txheem huab cua (cov roj oxydrogen), thiab cov pa roj ntsha, roj aliniarthes, muaj paab linefaction, thiab kev sib cais.
Dhau li ntawm lub zog thiab tshuaj muaj tshuaj, dab tsi lwm cov ntawv thov ua gr.9 cov yeeb nkab steel muaj?
Thaum lub zog thiab kev lag luam siv tshuaj lom neeg yog nws thawj qhov kev ua lag luam, A333 Gr.9 tseem siv rau lwm lub teb uas xav tau kev ua tiav kev ua tau zoo. Piv txwv li, hauv qis - kub kev tshawb fawb, nws yog siv los tsim kev thauj khoom xws li ua kua nitrogen thiab cov kua helium. Hauv kev lag luam khoom noj khoom haus, nws tuaj yeem siv rau cov piping hauv qee qhov tawg hauv cov khoom siv khov. Nws tseem qee zaus siv ua cov qauv kev txhawb nqa rau kev tshawb fawb Polar lossis cov chaw pabcuam tshwj xeeb hauv cov cheeb tsam txias. Thaum nws thawj daim ntawv thov yog cov piping, nws cov khoom siv ua rau nws muaj peev xwm muaj txiaj ntsig zoo nyob rau hauv ib qho kev thov cryogenic.
A333 Gr.9 raug xaiv rau lwm cov ntaub ntawv lwm yam (xws li cov hlau qub) hauv cov ntawv thov cryogenic?
Cov kev xaiv yog ua raws cov kev txiav txim siab ntawm kev tsim cov ntsuas kub, siab, cov xov xwm hauv cov qauv, thiab tus nqi. Austenitic stainless hlau (xws li 304 / 316L) tuaj yeem siv nyob rau hauv qis dua ntawm kev tawg (SCC) thiab muaj txiaj ntsig zoo dua rau cov kab mob corrosion (SCC) hauv chloride tawg (hauv qab no. A333 Gr.9 muaj kev ua haujlwm qis dua ntawm kwv yees li- 14℃thiab tsis tshua muaj kev tiv thaiv hauv cov xeb ib puag ncig. Yog li ntawd, nyob rau hauv cov tsis-xeb ib puag ncig -100 degree, Gr.9 yog qhov kev xaiv tshaj plaws. Rau txawm tias qis dua huab cua lossis ntau dua kev txhim kho ib puag ncig, stainless hlau lossis cov npib tsib xee-raws li alloys yuav tsum tau txiav txim siab.
Cov ntaub ntawv sib txawv contrigured li cas nyob rau hauv ib tug raug cryogenic project piping system?
Nyob rau hauv ib txwm lng lossis tshuaj lom neeg cog qoob loo, cov ntawv xaiv kev xaiv yog nyob ntawm cov "kev kub ntxhov." Cov chaw nyob qis dua nrog qhov qis tshaj plaws (xws li Lng Pipelines ntawm {}} 162 degree) yuav siv cov ntaub ntawv xws li 304L lossis 9% npib tsib xee. Xws li cov kua dej kub nce (piv txwv li, tom qab dhau los ntawm kev xaiv cua sov), A333 Gr.9 dhau los ua qhov txiaj ntsig zoo tshaj plaws nyob rau thaj chaw saum toj -100 tab sis tseem suav hais tias cryogenic. Thaum qhov kub thib ntxiv, siab dua -45 degree, A333 Gr.6 lossis cov yeeb nkab hlau lossis cov roj carbon hlau tuaj yeem hloov mus rau cov kev xaiv ntau. Qhov kev xaiv tiered no ua tiav tau ua tiav qhov kev ua kom pom kev nyab xeeb thiab cov phiaj xwm kev lag luam.
