1. Nominal Pipe Size (NPS) yog dab tsi?
NPS yog North American tus qauv txheej txheem ntawm qhov ntau thiab tsawg rau cov kav dej. Rau NPS 12 thiab qis dua, NPS tus lej yog tus lej nominal uas tsis ncaj qha rau qhov tseeb sab nraud. Rau NPS 14 thiab tshaj, NPS tus lej yog sib npaug rau qhov tseeb sab nraud txoj kab uas hla hauv nti -4.
2. "Schedule" (SCH) txhais li cas rau cov yeeb nkab?
Qhov "Schedule" hais txog qhovphab ntsa thicknessntawm lub cev. Rau qhov muab NPS, tus lej teem sijhawm siab dua txhais tau tias yog phab ntsa tuab dua. Cov sijhawm teem sijhawm muaj xws li SCH 40, SCH 80, thiab SCH 160. Lub phab ntsa tuab tso cai rau cov yeeb nkab tuaj yeem tiv taus siab dua sab hauv -4.
3. Kuv yuav xam qhov theoretical qhov hnyav ntawm cov yeeb nkab carbon steel li cas?
Tus qauv qauv yog:Qhov hnyav (kg / m)=(Sab nraud Diameter (mm) – Phab ntsa Thickness (mm)) × Phab ntsa Thickness (mm) × 0.02466. Tom qab ntawd koj tuaj yeem muab faib los ntawm tag nrho qhov ntev hauv meters kom tau tag nrho qhov hnyav -7.
4. Dab tsi yog cov qauv yeeb nkab ntev muaj?
Tus qauv Tshuag ntev yog feem ntau20 ko taw (kwv yees . 6 meters)thiab40 ko taw (kwv yees . 12 meters). Cov neeg muag khoom feem ntau kuj muab kev cai txiav - mus rau - ntev cov kev pab cuam kom tau raws li qhov yuav tsum tau ua -1-6.
5. Dab tsi yog qhov txawv ntawm cov yeeb nkab tshiab, siv, thiab cov khoom seem?
New cevyog thawj, cov ntaub ntawv pov thawj ncaj qha los ntawm lub zeb.Lub cev muaj zogyog tshiab, tsis siv cov yeeb nkab uas lub tuam txhab tsis xav tau lawm.Siv lub cevtau ua haujlwm ua ntej thiab feem ntau muag rau cov qauv lossis tsis yog- daim ntawv thov tseem ceeb ntawm tus nqi qis -1.
