Kev piav qhia kom raug qhov loj ntawm lub raj xa dej yuav tsum muaj ntau yam tseem ceeb:
Sab Nraud Txoj Kab uas hla (OD)
Lub cheeb tsam sab nraud ntawm cov yeeb nkab hlau, feem ntau yog qhia ua nominal diameter (DN) lossis nominal pipe size (NPS).
Qhov Loj ntawm Cov Yeeb Nkab Nominal (NPS) piv rau Qhov Loj ntawm Cov Yeeb Nkab Nominal (DN)
NPS yog qhov loj me raws li nti, thaum DN yog qhov txoj kab uas hla hauv millimeters. Kev hloov pauv yooj yim heev: tus nqi ntawm DN yog sib npaug rau tus nqi NPS muab faib rau 25.4 (mm/nti) kom puag ncig qhov tshwm sim.
Hauv kev xyaum, qhov kev sib raug zoo ntawm NPS thiab DN cov qauv yog raws li cov lus qhia ntsuas uas tau tsim.
Phab ntsa tuab (WT)
Qhov tuab ntawm phab ntsa yeeb nkab. Rau cov yeeb nkab loj, qhov tuab ntawm phab ntsa feem ntau cuam tshuam nrog Daim Ntawv Teev Npe ntawm cov yeeb nkab, piv txwv li Daim Ntawv Teev Npe 40 lossis Daim Ntawv Teev Npe 80, qhov twg cov nqi loj dua qhia txog phab ntsa tuab dua.
Ntev
Qhov ntev ntawm cov yeeb nkab hlau, uas tuaj yeem kho lossis tsis xaiv, nyob ntawm qhov yuav tsum tau ua thiab kev siv. Qhov ntev feem ntau yog 6 meters thiab 12 meters.
Khoom siv
Cov qauv khoom siv thiab qib rau cov yeeb nkab hlau, xws li ASTM A106 Qib B, API 5L Qib B, thiab lwm yam. Cov qauv no qhia meej txog cov tshuaj lom neeg thiab cov khoom siv lub cev ntawm cov yeeb nkab.
Cov Qauv
Cov qauv ntsuas rau cov yeeb nkab carbon thiab stainless hlau feem ntau ua raws li ASME B36.10M (carbon thiab alloy steel) thiab B36.19M (stainless steel yeeb nkab).
Cov Lus Qhia Txog Qhov Loj ntawm Cov Yeeb Nkab thiab Cov Lus Qhia Txog Qhov Hnyav (WGT)
muab ib txoj hauv kev txheem los piav qhia txog cov yeeb nkab phab ntsa tuab raws li cov Schedules sib txawv, nrog rau kev faib tawm ntawm cov qib hnyav xws li STD, XS, XXS, thiab lwm yam.
Qhov tuab ntawm phab ntsa ntawm cov yeeb nkab cuam tshuam ncaj qha rau qhov loj thiab qhov hnyav ntawm cov yeeb nkab. Qhov tuab ntawm phab ntsa yog qhov tseem ceeb vim nws txiav txim siab qhov siab ntawm cov yeeb nkab sab hauv.
Tus lej teem sijhawm
Ib txoj hauv kev los qhia txog qhov tuab ntawm phab ntsa ntawm cov yeeb nkab, feem ntau xws li Daim Ntawv Teev Npe 40 thiab 80, hais txog qhov tuab ntawm phab ntsa txheem thiab cov yeeb nkab txhawb nqa rau ib txoj kab uas hla sab nraud.
Qhov kev xam kwv yees ntawm tus lej teem sijhawm yog raws li nram no:
Vim lawv muaj peev xwm tiv taus qhov siab ib txwm muaj, cov kav hlau Schedule 40 thiab Schedule 80 feem ntau xav tau hauv ntau yam lag luam. Vim tias cov kav dej no tau tsim los tiv taus qhov siab dua, lawv feem ntau xav tau ntau heev kom tau raws li qhov xav tau ntawm ntau yam lag luam.
| NPS | SAB NRAUV DIAMETERS (HAUV) | SAB HAUV DIAMETERS (HAUV) | PHAB NTSA TUAB (IN) | Qhov Hnyav (LB/FT) |
| 1/8 | 0.405" | 0.269" | 0.068" | 0.24 phaus/ft |
| 1/4 | 0.540" | 0.364" | 0.088" | 0.42 phaus/ft |
| 3/8 | 0.675" | 0.493" | 0.091" | 0.57 phaus/ft |
| 1/2 | 0.840" | 0.622" | 0.109" | 0.85 phaus/ft |
| 3/4 | 1.050" | 0.824" | 0.113" | 1.13 phaus/ft |
| 1 | 1.315" | 1.049" | 0.133" | 1.68 phaus/ft |
| 1 1/4 | 1.660" | 1.380" | 0.140" | 2.27 phaus/ft |
| 1 1/2 | 1.900" | 1.610" | 0.145" | 2.72 phaus/ft |
| 2 | 2.375" | 2.067" | 0.154" | 3.65 phaus/ft |
| 2 1/2 | 2.875" | 2.469" | 0.203" | 5.79 phaus/ft |
| 3 | 3.500" | 3.068" | 0.216" | 7.58 phaus/ft |
| 3 1/2 | 4.000" | 3.548" | 0.226" | 9.11 phaus/ft |
| 4 | 4.500" | 4.026" | 0.237" | 10.79 phaus/ft |
| 5 | 5.563" | 5.047" | 0.258" | 14.62 phaus/ft |
| 6 | 6.625" | 6.065" | 0.280" | 18.97 phaus/ft |
| 8 | 8.625" | 7.981" | 0.322" | 28.55 phaus/ft |
| 10 | 10.750" | 10.020" | 0.365" | 40.48 phaus/ft |
| 12 | 12.75" | 11.938" | 0.406" | 53.52 phaus/ft |
| 14 | 14.000" | 13.124" | 0.438" | 63.50 phaus/ft |
| 16 | 16.000" | 15.000" | 0.500" | 82.77 phaus/ft |
| 18 | 18.000" | 16.876" | 0.562" | 104.70 phaus/ft |
| 20 | 20.000" | 18.812" | 0.594" | 123.10 phaus/ft |
| 24 | 24.000" | 22.624" | 0.688" | 171.30 phaus/ft |
| NPS | SAB NRAUV DIAMETERS (HAUV) | SAB HAUV DIAMETERS (HAUV) | PHAB NTSA TUAB (IN) | Qhov Hnyav (LB/FT) |
| 1/8 | 0.405" | 0.215" | 0.095" | 0.32 phaus/ft |
| 1/4 | 0.540" | 0.302" | 0.119" | 0.54 phaus/ft |
| 3/8 | 0.675" | 0.423" | 0.126" | 0.74 phaus/ft |
| 1/2 | 0.840" | 0.546" | 0.147" | 1.09 phaus/ft |
| 3/4 | 1.050" | 0.742" | 0.154" | 1.47 phaus/ft |
| 1 | 1.315" | 0.957" | 0.179" | 2.17 phaus/ft |
| 1 1/4 | 1.660" | 1.278" | 0.191" | 3.00 phaus/ft |
| 1 1/2 | 1.900" | 1.500" | 0.200" | 3.63 phaus/ft |
| 2 | 2.375" | 1.939" | 0.218" | 5.02 phaus/ft |
| 2 1/2 | 2.875" | 2.323" | 0.276" | 7.66 phaus/ft |
| 3 | 3.500" | 2.900" | 0.300" | 10.25 phaus/ft |
| 3 1/2 | 4.000" | 3.364" | 0.318" | 12.50 phaus/ft |
| 4 | 4.500" | 3.826" | 0.337" | 14.98 phaus/ft |
| 5 | 5.563" | 4.813" | 0.375" | 20.78 phaus/ft |
| 6 | 6.625" | 5.761" | 0.432" | 28.57 phaus/ft |
| 8 | 8.625" | 7.625" | 0.500" | 43.39 phaus/ft |
| 10 | 10.750" | 9.562" | 0.594" | 64.42 phaus/ft |
| 12 | 12.75" | 11.374" | 0.688" | 88.63 phaus/ft |
| 14 | 14.000" | 12.500" | 0.750" | 106.10 phaus/ft |
| 16 | 16.000" | 14.312" | 0.844" | 136.58 phaus/ft |
| 18 | 18.000" | 16.124" | 0.938" | 170.87 phaus/ft |
| 20 | 20.000" | 17.938" | 1.031" | 208.92 phaus/ft |
| 24 | 24.000" | 21.562" | 1.219" | 296.58 phaus/ft |
Yog li ntawd, ib qho piv txwv tiav ntawm cov lus piav qhia txog qhov loj ntawm cov yeeb nkab hlau yuav yog "NPS 6 nti, Schedule 40, ASTM A106 Qib B, Ntev 6 meters". Qhov no sawv cev rau cov yeeb nkab hlau nrog lub cheeb tsam nominal ntawm 6 nti, Schedule 40, tsim tawm raws li ASTM A106 Qib B cov qauv, thiab ntev li 6 meters.
Lub sijhawm tshaj tawm: Lub Ob Hlis-28-2024