Nqe Lus Nug: Dab tsi yog qhov yuav tsum tau kho cua sov rau ASTM A106 seamless kav?
Teb: ASTM A106 seamless kav feem ntau muab raws li kub - tiav lossis txias - kos. Kev kho cua sov (xws li normalization lossis txo kev ntxhov siab) tsis tas yuav tsum tau tshwj xeeb tshwj xeeb rau cov xwm txheej tshwj xeeb, xws li Gr C hauv qee qhov ntau thiab tsawg lossis rau cov khoom txhim kho.
Lus Nug: Dab tsi yog qhov txawv ntawm seamless thiab welded carbon steel kav?
Teb: Cov kav dej seamless yog tsim los ntawm extruding los yog tho ib qho khoom siv hlau, uas ua rau tsis muaj vuam seam, uas muab kev siab zoo dua qub, sib xws, thiab lub zog. Welded kav yog tsim los ntawm dov thiab vuam steel daim hlau, uas tuaj yeem siv nyiaj ntau dua tab sis yuav muaj cov ntsiab lus tsis muaj zog ntawm qhov vuam. Cov qib seamless feem ntau suav nrog ASTM A106 thiab API 5L.
Lus Nug: Dab tsi yog phab ntsa thickness kam rau ua rau ASTM A53 seamless yeeb nkab?
Teb: Rau ASTM A53 seamless yeeb nkab, phab ntsa thickness kam rau ua yog feem ntau ± 12.5% ntawm nominal phab ntsa thickness, raws li tus qauv specification. Piv txwv li, cov yeeb nkab nrog 0.5-nti phab ntsa tuab tuaj yeem sib txawv ntawm 0.4375 txog 0.5625 ntiv tes.
Nqe Lus Nug: ASTM A106 Gr B puas tuaj yeem siv rau qis-kev pabcuam kub?
Teb: Tsis yog, ASTM A106 Gr B tsis pom zoo rau qis- kev pabcuam kub (qis dua -20℃F lossis -29 degree) vim tias nws tuaj yeem ua nkig. Rau cov ntawv thov kub qis, cov ntaub ntawv zoo li ASTM A333 Gr 6 (uas yog cov pa roj carbon steel nrog cov kev ntsuas cuam tshuam) yog qhov tsim nyog dua.
Nqe Lus Nug: Cov pa roj carbon sib npaug rau API 5L Gr B yog dab tsi thiab vim li cas nws tseem ceeb?
Teb: Cov pa roj carbon sib npaug (CE) rau API 5L Gr B feem ntau yog nyob ib puag ncig 0.25-0.30%, suav nrog cov qauv CE=C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Nws yog ib qho tseem ceeb rau kev ntsuam xyuas weldability-tus nqi qis CE qhia tau hais tias weldability zoo dua thiab txo kev pheej hmoo ntawm kev tawg thaum vuam.
