1. Q: Vim li cas ASTM A53 Hom F (Lub Rauv Butt-Welded) tsis tshua siv rau kev siv siab?
A: Nws muaj qhov ntsuas siab qis tshaj plaws ntawm A53 hom vim qhov tsis muaj zog forged weld seam, thiab feem ntau txwv rau qis - cov ntawv thov siab xws li cov kav dej.
2. Q: Dab tsi yog qhov siab tshaj carbon cov ntsiab lus tso cai hauv ASTM A106 Gr. B rau kev txhim kho weldability?
A: 0.30% max (los ntawm kev ntsuas kub). Cov pa roj carbon qis feem ntau txhim kho weldability los ntawm kev txo cov tawv nqaij hauv tshav kub- cuam tshuam cheeb tsam (HAZ).
3. Q: Dab tsi yog tus yam ntxwv tseem ceeb ntawm "Tua" steel siv hauv cov kav dej zoo li ASTM A333?
A: Nws yog deoxidized tag nrho, uas ua rau ib tug ntau homogeneous qauv nrog tsawg tsawg porosity, zoo dua rau kev sib sau, vuam, thiab qis - kub kev pab cuam.
4. Q: Dab tsi yog qhov kev pheej hmoo loj corrosion rau carbon steel kav hauv kev pab cuam offshore?
A: CO2 (qab zib) Corrosion thiab Oxygen-induced pitting. Qhov no yuav tsum tau ua tib zoo xaiv cov khoom siv, kev tiv thaiv corrosion, thiab feem ntau inhibition systems.
5. Q: NACE MR0175 / ISO 15156 kev ua raws cai qhia dab tsi rau cov pa roj carbon steel yeeb nkab?
A: Nws yog qhov tsim nyog rau kev siv hauv kev pabcuam qaub (H2S-ib puag ncig) nyob rau hauv cov kev txwv tshwj xeeb, tau dhau qhov kev xeem SSC (Sulfide Stress Cracking).
