| 1 | Tus qauv siv li cas rau SAW yeeb nkab rau roj thiab roj? | API Specification 5L thiab GB / T 9711 yog thawj tus qauv-3. |
| 2 | Lub hom phiaj ntawm cov yeeb nkab kawg expansion txheej txheem yog dab tsi? | Nws txhim kho qhov sib npaug ntawm cov yeeb nkab kawg, kom ntseeg tau tias haum zoo dua - rau thaj chaw vuam-3. |
Cov kav dej no yog tsim los tswj cov tawv nqaij hauv qhov chaw txias.
| Tsis muaj. | Lus nug | Teb (nrog Cov Qib / Cov Qauv) |
|---|---|---|
| 3 | Tus txheej txheem twg npog welded steel yeeb nkab rau qis - qhov kev pab kub? | ASTM A333 / A333M npog seamless thiab welded steel yeeb nkab rau qis- qhov kub thiab txias qhov kev pab cuam yuav tsum tsis txhob toughness-4. |
| 4 | Dab tsi yog cov cuab yeej tseem ceeb rau qis -cov kav dej kub? | Notch toughness (kev cuam tshuam lub zog nqus) ntawm qhov ntsuas qhov ntsuas qhov tsawg kawg nkaus kom tiv thaiv kev tawg-4. |
| 5 | Puas yog tag nrho cov phab ntsa tuab muaj rau cov qib qis - kub? | Tsis yog. Cov phab ntsa hnyav dua tuaj yeem cuam tshuam cov khoom tsis zoo, yog li qhov muaj nyob yuav raug txwv rau qee qib thiab qhov ntau thiab tsawg-4. |
