Q: Dab tsi yog "NPS" sawv rau hauv cov yeeb nkab loj?
A: NPS sawv cev rau "Nominal Pipe Size," tus tsim tsis muaj qhov loj me uas tau hloov cov ntsiab lus xws li "nominal diameter"-2.
Q: Qhov kev tswj xyuas zoo li cas daim ntawv pov thawj tseem ceeb rau cov chaw tsim khoom siv yeeb nkab ua haujlwm rau kev lag luam roj thiab roj?
A: API Spec Q1yog cov kev tswj xyuas qhov system specification rau cov koom haum hauv kev lag luam roj av thiab natural gas-5.
Q: Dab tsi yog "kub" lossis "tshav kub" nyob rau hauv cov ntsiab lus ntawm cov yeeb nkab steel ntau lawm?
A: Nws yog tus cim tshwj xeeb rau ib pawg tshwj xeeb ntawm cov hlau molten los ntawm cov kav dej uas tau tsim, tso cai rau tag nrho traceability ntawm cov tshuaj muaj pes tsawg leeg thiab keeb kwm ntau lawm.
Q: Dab tsi yog qhov tseem ceeb ntawm kev tsim "M" hauv tus qauv zoo li ASTM A312 / A312M?
A: Qhov kev xaiv "M" qhia tias tus qauv yog nyob rau hauv metric (SI) units. Tus qauv siv tau hauv ob nti - phaus (A312) lossis metric (A312M) units-2.
Q: Vim li cas cov tshuaj muaj pes tsawg leeg thiaj li tswj hwm hauv cov yeeb nkab steel specifications?
A: Kev tswj xyuas meej ntawm cov khoom xws li Carbon, Manganese, Chromium, Molybdenum, Nickel, thiab lwm yam, ncaj qha txiav txim siab qhov kawg ntawm cov khoom siv, weldability, thiab corrosion / oxidation tsis kam ntawm cov yeeb nkab, kom ntseeg tau tias nws ua tau zoo nyob rau hauv nws cov kev pab cuam.
