Q: Dab tsi yog qhov siab tshaj plaws ua haujlwm kub rau API 5L X80 welded yeeb nkab?A: Qhov siab tshaj plaws ua haujlwm kub rau API 5L X80 welded yeeb nkab feem ntau yog 120℃(248℃F). Tshaj li qhov ntsuas kub no, nws cov khoom siv kho tshuab tuaj yeem degrade, cuam tshuam rau kev nyab xeeb ntawm cov kav dej.
Q: API 5L welded kav puas tuaj yeem siv rau kev siv cov kav dej sab nrauv?A: Yog lawm, tab sis lawv yuav tsum ua kom tau raws ntug hiav txwv - cov cai tshwj xeeb. API 5L offshore welded kav (piv txwv li, X65MO, X70MO) muaj kev tiv thaiv corrosion ntau dua thiab muaj kev cuam tshuam toughness kom hloov mus rau qhov hnyav marine ib puag ncig.
Q: Dab tsi yog ob lub ntsiab ntawm ASTM A53 welded kav?A: ASTM A53 welded kav muab faib ua hom F (lub qhov cub- taub qab welded, nruam) thiab hom E (hluav taws xob-tsis kam welded, ERW). Hom F yog qhov tsim nyog rau cov ntawv thov siab qis, thaum Hom E muaj zog dua thiab siv rau nruab nrab - cov xwm txheej siab.
Q: Cov khoom muaj pes tsawg leeg ntawm ASTM A53 Qib A welded yeeb nkab yog dab tsi?A: ASTM A53 Qib A yog cov pa roj carbon steel yeeb nkab nrog cov ntsiab lus siab tshaj plaws ntawm 0.25%, manganese cov ntsiab lus ntawm 0.95-1.30%, thiab cov ntsiab lus silicon tsawg dua lossis sib npaug li 0.35%. Nws muaj zoo weldability thiab ductility.
Q: Qhov tsawg kawg nkaus tensile lub zog ntawm ASTM A53 Qib B welded yeeb nkab yog dab tsi?A: Qhov tsawg kawg nkaus tensile lub zog ntawm ASTM A53 Qib B welded yeeb nkab yog 485 MPa (70,000 psi), thiab nws qhov tsawg kawg nkaus yield zog yog 276 MPa (40,000 psi), uas siab dua qib A.
