1. Q: Lub npe tus qauv thiab qib rau hluav taws xob-kuj-welded (ERW) steel yeeb nkab rau kev siv siab.
A: ASTM A134 (feem ntau Qib A, tab sis lwm qib ASTM tuaj yeem teev tau) lossis hom ERW hauv qab ASTM A53 Qib B.
2. Q: Dab tsi yog tus qauv tseem ceeb rau seamless txias - kos carbon steel feedwater rhaub raj?
A: ASTM A556 Cov Lus Qhia Tshwj Xeeb Cov qib feem ntau yog A556 Qib A2 (C-Mn steel, normalized) thiab Qib B2 (C-Mn steel, kev nyuaj siab-relieved).
3. Q: Tus txheej txheem ASTM twg yog siv cov welded nruam (CW) wrought - cov yeeb nkab hlau? Puas muaj ntau?
A: ASTM A72. Nws yog rau qis - cov ntawv thov siab xws li cov kua dej thiab tsis tshua muaj ntau dua li cov welded lossis seamless hom.
4. Q: Dab tsi yog tus yam ntxwv tseem ceeb ntawm cov hlau rau ASTM A120 yeeb nkab (tus qauv keeb kwm)?
A: Nws yog tus qauv dav dav - lub hom phiaj feem ntau hloov los ntawm A53/A106. Nws tsis tau tswj cov qib tshwj xeeb xws li cov khoom siv niaj hnub no.
5. Q: Rau cov qauv tubing nrog kev txhim kho atmospheric corrosion kuj, ASTM qib yuav siv li cas?
A: ASTM A847 (txias-ua welded thiab seamless). Nws yog siab -lub zog qis- alloy (HSLA) steel nrog txhim kho corrosion kuj.
