1. Q: Dab tsi yog "GROOVE" nyob rau hauv cov ntsiab lus ntawm cov kav dej zoo li ASTM A53?
A:Nws yog hais txog kev siv tshuab grooving (piv txwv li, ntu ntu ntu) ntawm cov yeeb nkab sab nrauv kom lees txais qhov sib txuas sib txuas (xws li Victaulic-style) rau kev sib dhos ceev.
2. Q: Vim li cas tom qab -weld heat treatment (PWHT) tej zaum yuav tsum tau rau carbon steel yeeb nkab welds?
A:Txhawm rau txo qis kev ntxhov siab, tshwj xeeb tshaj yog nyob rau hauv tuab - ntu phab ntsa lossis rau cov kev pabcuam cuam tshuam rau kev ntxhov siab corrosion cracking (SCC).
3. Q: Dab tsi yog cov khoom siv tseem ceeb ntawm API 5L Gr. B thiab X42?
A:Yam tsawg kawg nkaus Yield Strength. Gr. B yog 35 ksi (241 MPa), X42 yog 42 ksi (290 MPa). X42 yog qib siab zog nyob rau hauv API 5L specification.
4. Q: "HIC Test" yog dab tsi thiab thaum twg nws tau teev tseg?
A:Hydrogen Induced Cracking Test. Nws tau teev tseg rau cov kav dej hauv "kev pabcuam qaub" (ntub H2S ib puag ncig) kom ntseeg tau tias muaj kev tiv thaiv mus rau kev tawg.
5. Q: Cov yeeb nkab "SAW" txhais li cas thiab qhov loj npaum li cas yog qhov sib txawv?
A:Submerged Arc Welded. Feem ntau rau cov kav dej loj loj (piv txwv li, tshaj 24 "NPS) siv rau hauv cov kav xa dej. Nws tuaj yeem ua tau ntev (LSAW) lossis kauv (SSAW) welded.
