1. Q: Cov tshuaj muaj pes tsawg leeg ntawm ASTM A53 Qib B carbon steel welded yeeb nkab yog dab tsi?
A:Raws li ASTM A53, Qib B yeeb nkab muaj cov ntsiab lus siab tshaj plaws ntawm 0.30%, manganese 1.20%, phosphorus 0.05%, sulfur 0.045%, thiab tooj liab 0.40% min thaum xav tau kev txhim kho corrosion.
2. Q: Lub zog ntawm API 5L Gr B welded yeeb nkab yog dab tsi?
A:API 5L Gr B welded yeeb nkab muaj qhov tsawg kawg nkaus lub zog ntawm 35,000 psi (241 MPa) raws li tus qauv.
3. Q: JIS G3444 STK400 welded yeeb nkab feem ntau tsim li cas?
A:JIS G3444 STK400 yeeb nkab feem ntau yog tsim los siv hluav taws xob tsis kam vuam (ERW) lossis cov txheej txheem txuas txuas ntxiv, thiab nws yog tsim los rau cov qauv siv dav dav.
4. Q: Dab tsi yog qhov txawv ntawm ASTM A53 Qib A thiab Qib B?
A:Qhov sib txawv tseem ceeb yog cov neeg kho tshuab: Qib A muaj qhov tsawg kawg nkaus lub zog ntawm 30,000 psi (207 MPa), thaum Qib B muaj 35,000 psi (241 MPa). Qib B kuj muaj zog tensile ntau dua thiab nruj dua tshuaj muaj pes tsawg leeg tswj.
5. Q: Cov ntawv thov twg yog API 5L X52 welded yeeb nkab haum rau?
A:API 5L X52 welded yeeb nkab yog dav siv nyob rau hauv cov roj thiab roj xa mus kav dej vim nws lub zog siab (tsawg kawg yield zog 52,000 psi / 358 MPa) thiab zoo toughness.
