Dab tsi yog lub sijhawm ua yeeb yaj kiab?
Pipe Gauge (SCH) yog ib qho kev ntsuas ntawm nominal phab ntsa thickness ntawm steel yeeb nkab.
Schedule 40 yog dab tsi?
Teem sijhawm 40 (SCH 40) carbon steel yeeb nkabyog ib hom yeeb nkab specification uas sawv cev rau cov yeeb nkab phab ntsa thickness thiab siab-bearing muaj peev xwm.
Phab ntsa tuab ntawm SCH 40 yeeb nkab yog: 40 × 1 / 1000=0.040 ntiv tes =1.016 hli.
Raws li American pipeline standard ANSI/ASME B36.10M, cov specifications ntawm SCH 40 steel yeeb nkab yog:
Sab nraud txoj kab uas hla: 1/8 nti ~ 30 nti, dav dav, npog ntau yam kev siv kav dej.
Phab ntsa thickness: 0.040 nti, kwv yees li 1.016 hli.
Nominal diameter ratio: 0.85 (D/t).
Qhov tsawg kawg nkaus tawm lub zog tau teev tseg los ntawm tus qauv: 35000PSI lossis 240Mpa.
Txuj kev ua haujlwm siab: mus txog 700PSI, txog 48.3Bar.
Schedule 80 yog dab tsi?
Teem sijhawm 80 (SCH 80) carbon steel yeeb nkab kuj yog hom yeeb nkab tshwj xeeb, uas txhais tau hais tias cov yeeb nkab muaj cov phab ntsa tuab dua thiab muaj peev xwm siab dua.
Phab ntsa tuab ntawm SCH 80 yeeb nkab yog 80 × 1 / 1000=0.080 ntiv tes =2.032 hli, uas yog ob npaug ntawm phab ntsa tuab ntawm SCH 40.
Raws li American pipeline standard ANSI/ASME B36.10M, cov specifications ntawm SCH 80 steel yeeb nkab yog:
Sab nraud txoj kab uas hla: 1/8 nti ~ 30 nti, tib yam li SCH40, tab sis dav dua.
Phab ntsa thickness: 0.080 nti, txog 2.032 hli, 2 npaug ntawm SCH40.
Nominal diameter ratio: 0.43 (D/t).
Qhov tsawg kawg nkaus tawm lub zog tau teev tseg los ntawm tus qauv: 35000PSI lossis 240Mpa, tib yam li SCH 40.
Txuj kev ua haujlwm siab: mus txog 3000PSI, txog 207Bar, ntau dua SCH 40.
Teem caij 40 thiab Teem caij 80 kav dej:
1. Phab ntsa Thickness - Teem caij 80 yeeb nkab muaj phab ntsa tuab dua li Schedule 40 yeeb nkab rau tib NPS. Cov phab ntsa tuab ntxiv ua rau Schedule 80 yeeb nkab muaj zog thiab muaj peev xwm tiv taus siab dua thiab hnyav dua.
2. Qhov hnyav - Qhov hnyav ntawm Schedule 40 yeeb nkab nyob ntawm nws qhov ntev thiab cov khoom muaj pes tsawg leeg, tab sis nws yog sib dua li Teem caij 80 yeeb nkab vim nws cov phab ntsa nyias.
3. Kev ntsuas siab - Teem sijhawm 40 yeeb nkab muaj qhov ntsuas qis dua li Teem 80 yeeb nkab vim nws cov phab ntsa tuab tuab.
4. Teem sijhawm 80 yeeb nkab tuaj yeem tiv taus siab dua thiab feem ntau yog siv rau hauv cov ntawv thov hnyav.
