Lub Sij Hawm Pipe yog dab tsi? Pipe Wall Thickness Classification piav qhia
Pipe Schedule (SCH) yog cov txheej txheem phab ntsa tuab tsim rau cov yeeb nkab steel, txhais los ntawm ASME B36.10 rau carbon thiab alloy steel yeeb nkab, thiab ASME B36.19 rau stainless hlau yeeb nkab. Lub sijhawm txheej txheem tau tsim los muab cov txheej txheem txheej txheem rau kev qhia cov yeeb nkab phab ntsa thicknesses hla qhov sib txawv nominal qhov ntau thiab tsawg, ua kom muaj kev sib hloov thiab kev kwv yees lub peev xwm. Qhov siab dua tus naj npawb ntawm lub sijhawm, qhov tuab ntawm cov yeeb nkab phab ntsa rau qhov muab nominal txoj kab uas hla.
Lub hauv paus chiv keeb ntawm cov txheej txheem teev npe muaj feem xyuam rau qhov kwv yees qhov ntsuas ntsuas ntsuas ntsuas: Sch=1000 x P / S, qhov twg P yog qhov tso cai sab hauv hauv psi thiab S yog qhov tso cai fiber ntau hauv psi. Piv txwv li, SCH 40 yog Ameslikas tsim los rau 400 psi ua hauj lwm siab ntawm ib qho kev nyuaj siab ntawm 10,000 psi. Txawm hais tias niaj hnub tso cai rau kev ntxhov siab qhov tseem ceeb tau hloov pauv, cov xov tooj ntawm lub sijhawm tseem nyob raws li cov qauv tsim. Kev nkag siab txog qhov kev sib raug zoo no yog qhov tseem ceeb rau cov engineers thaum xaiv cov yeeb nkab rau qhov tshwj xeeb siab thiab qhov kub thiab txias.
Phab ntsa thickness ncaj qha txiav txim siab lub peev xwm ntawm cov yeeb nkab. Lub phab ntsa tuab muab kev ntsuas siab dua tab sis ntxiv qhov hnyav thiab tus nqi. Lub sijhawm teem sijhawm tso cai rau cov kws ua haujlwm xaiv qhov zoo tshaj qhov sib npaug ntawm lub peev xwm siab thiab kev lag luam. Rau cov ncauj lus kom ntxaws ntsuas ntsuas ntsuas, xa mus rau peb Cov Pipe Pressure Rating Guide.
Ua kom tiav Pipe Schedule Chart (SCH 5S - SCH XXS)
Cov yeeb nkab me me (1/2" - 4")
| NB (inch) | DN | OD (mm) | SCH 40 WT (hli) | SCH 80 WT (hli) | SCH 160 WT (hli) | XXS WT (mm) |
|---|---|---|---|---|---|---|
| 1/2" | 15 | 21.3 | 2.77 | 3.73 | 4.78 | 7.47 |
| 3/4" | 20 | 26.7 | 2.87 | 3.91 | 5.56 | 7.82 |
| 1" | 25 | 33.4 | 3.38 | 4.55 | 6.35 | 9.09 |
| 1-1/2" | 40 | 48.3 | 3.68 | 5.08 | 7.14 | 10.16 |
| 2" | 50 | 60.3 | 3.91 | 5.54 | 8.74 | 11.07 |
| 3" | 80 | 88.9 | 5.49 | 7.62 | 11.13 | 15.24 |
| 4" | 100 | 114.3 | 6.02 | 8.56 | 13.49 | 17.12 |
Medium Bore Pipe (6" - 24")
| NB (inch) | DN | OD (mm) | SCH 40 WT (hli) | SCH 80 WT (hli) | SCH 120 WT (hli) |
|---|---|---|---|---|---|
| 6" | 150 | 168.3 | 7.11 | 10.97 | 14.27 |
| 8" | 200 | 219.1 | 8.18 | 12.70 | 15.09 |
| 10" | 250 | 273.1 | 9.27 | 12.70 | 15.09 |
| 12" | 300 | 323.9 | 9.53 | 12.70 | 15.09 |
| 16" | 400 | 406.4 | 9.53 | 12.70 | 16.66 |
| 20" | 500 | 508.0 | 9.53 | 12.70 | 19.05 |
| 24" | 600 | 609.6 | 9.53 | 12.70 | 20.62 |
Loj Bore Pipe (26" - 48")
Rau cov yeeb nkab loj dua 24", lub sijhawm teem caij hloov pauv. Phab ntsa thickness tau teev tseg raws li SCH 20, SCH 30, SCH 40, SCH 60, SCH 80, thiab SCH 100. Cov loj loj no feem ntau yog tsim raws li cov yeeb nkab welded (LSAW lossis SSAW) txij li seamless manufacturing ua impractical saum 24 "OD. Phab ntsa thickness qhov tseem ceeb rau txoj kab uas hla loj yog tsawg tus qauv, thiab cov neeg yuav khoom yuav tsum xa mus rau qhov project specifications. Chaw tsim tshuaj pausPipe muab cov yeeb nkab loj mus txog 48 "OD hauv phab ntsa thicknesses ntawm 6.35 hli mus rau 25.4 hli.
SCH 40 vs SCH 80 Cov ntsiab lus sib piv
SCH 40 yog lub sijhawm teev cov yeeb nkab feem ntau hauv cov ntawv thov kev lag luam. Nws yog sib npaug rau keeb kwm "Standard" (STD) phab ntsa thickness tsim rau qhov ntau thiab tsawg mus txog 10", txawm hais tias saum toj no 10" STD muaj cov phab ntsa txawv dua li SCH 40. SCH 40 muab lub peev xwm txaus rau feem ntau cov ntawv thov kev pabcuam thiab muab qhov zoo tshaj plaws tag nrho cov nqi ntawm lub zog - rau - qhov hnyav piv. Nws tau teev tseg rau cov tshuab dej, compressed cua, chav (tsawg rau nruab nrab siab), thiab kev siv cov qauv siv.
SCH 80, keeb kwm hu ua "Extra Strong" (XS) rau qhov me me, muab kwv yees li 30-80% phab ntsa tuab dua SCH 40 nyob ntawm qhov loj. Qhov no nce phab ntsa thickness txhais ncaj qha rau hauv siab ua hauj lwm siab. Piv txwv li, 2-nti SCH 80 carbon steel yeeb nkab muaj kev ua haujlwm siab kwv yees li 1.5 npaug ntawm SCH 40. SCH 80 yog xaiv rau cov tshuab hydraulic siab, cov kab hluav taws xob siab tshaj 300 psi, cov kev pabcuam hnyav, thiab qhov yuav tsum tau muaj kev tiv thaiv corrosion ntxiv. Lub txim hnyav yog qhov tseem ceeb: SCH 80 feem ntau raug nqi 40-80% ntau dua SCH 40 rau tib lub npe loj vim yog cov khoom siv ntxiv.
| Parameter | SCH 40 | SCH 80 |
|---|---|---|
| Phab ntsa Thickness (4 "NB) | 6.02mm ib | 8.56mm ib |
| Luj (4 "NB) | 16.08kg / m | 22.32 kg / m |
| Ua haujlwm siab (4 "A106 Gr.B) | ~ 15.5 MPa | ~ 23.0 MPa |
| Daim ntawv thov tseem ceeb | General industrial piping | High -siab tshuab |
Lub Sijhawm Sijhawm Ua Haujlwm nrawm
SCH 5S/10Syog cov txheej txheem phab ntsa nyias nyias, siv feem ntau rau cov yeeb nkab steel hlau hauv qis - cov ntawv thov kev huv thiab kev ua zaub mov. Cov lus "S" qhia tau hais tias cov sijhawm no tshwj xeeb rau ASME B36.19 stainless hlau tus qauv. SCH 5S feem ntau muaj nyob rau hauv cov khoom noj siv mis thiab dej haus uas muaj qhov nrawm nrawm thiab siab qis. SCH 10S muab lub zog me ntsis ntxiv thaum lub teeb yuag thiab yooj yim rau vuam. Cov txheej txheem ntawm phab ntsa nyias nyias no tsis yog siv rau cov pa roj carbon steel hauv cov ntawv thov siab.
SCH 40 / STDyog kev lag luam- qauv phab ntsa tuab rau cov kav dej dav dav. Nws sawv cev qhov sib npaug zoo tshaj plaws ntawm lub peev xwm siab, qhov hnyav, thiab tus nqi rau feem ntau cov ntawv thov. SCH 40 yog qhov kev qhia tshwj xeeb rau kev faib dej, cov tshuab cua compressed, nruab nrab -siab chav, thiab kev siv cov qauv. Nws yog lub sij hawm uas feem ntau stocked nyob rau hauv cov yeeb nkab distributors 'inventory thoob ntiaj teb.
SCH 80 / XSmuab phab ntsa thickness ntxiv rau kev siv siab dua. Nws tau teev tseg thaum ua haujlwm siab tshaj SCH 40 lub peev xwm, qhov twg yuav tsum muaj kev tiv thaiv corrosion ntxiv, lossis qhov twg cov khoom siv lub zog xav tau kom muaj phab ntsa tuab. XS (Extra Strong) yog qhov kev xaiv ib txwm muaj kwv yees li ntawm SCH 80 rau qhov ntau thiab tsawg 8 "thiab hauv qab no, txawm tias qhov kev sib raug zoo sib txawv ntawm qhov loj me.
SCH 160/XXSsawv cev rau cov phab ntsa tuab tshaj plaws hauv cov txheej txheem txheej txheem. XXS (Double Extra Strong) muab lub siab tshaj plaws phab ntsa thickness muaj raws li cov khoom txheem. Cov sij hawm no yog siv nyob rau hauv ultra- siab- cov ntawv siv siab, xws li cov tshuab hydraulic, siab - cov kab tshuaj txhaj tshuaj, thiab cov kev pabcuam tseem ceeb uas yuav tsum muaj kev nyab xeeb siab tshaj plaws. Qhov hnyav ib 'meter' tuaj yeem ua tau ntau dua ob npaug ntawm SCH 40 rau tib lub npe loj.
Teem caij sib txawv ntawm cov khoom
Carbon steel yeeb nkab teem sij hawm yog txhais los ntawm ASME B36.10, thaum lub sij hawm stainless hlau yeeb nkab raws li ASME B36.19. Qhov sib txawv tseem ceeb yog lub sij hawm stainless hlau nrog cov lus "S" (SCH 5S, 10S, 40S, 80S) muaj qhov sib txawv sab nraud raws li lawv cov carbon steel counterparts tab sis tej zaum yuav muaj cov phab ntsa sib txawv. Rau SCH 40S thiab SCH 80S, cov phab ntsa thicknesses zoo ib yam rau carbon steel SCH 40 thiab SCH 80 rau qhov ntau thiab tsawg 12 "thiab hauv qab no. Txawm li cas los xij, rau SCH 5S thiab SCH 10S, stainless hlau phab ntsa thicknesses yog thinner dua li cov pa roj carbon steel lub sij hawm, qhia txog kev siv cov hlau tsis huv hauv cov ntawv siv sib dua -.
Cov lus "S" qhia meej meej tias lub sijhawm yog los ntawm ASME B36.19 tus qauv. Thaum xaj cov yeeb nkab steel hlau, nws yog ib qho tseem ceeb uas yuav tsum tau qhia lub sijhawm "S" kom ntseeg tau tias cov phab ntsa tuab raug muab nkag. Piv txwv li, xaj "4-nti SCH 10S 304L stainless hlau yeeb nkab" ua kom cov yeeb nkab ua raws li cov phab ntsa nyias nyias ntawm cov qauv stainless hlau ntau dua li cov qauv carbon steel hnyav dua.
Yuav Ua Li Cas Xaiv Cov Txheej Txheem Yeeb Nkab los ntawm Lub Siab
Kev xaiv ntawm cov kav dej raws li qhov siab ua raws li qhov kev sib raug zoo uas tau teev tseg los ntawm Barlow's Formula: t=(P x D) / (2S), qhov twg t yog qhov tsawg kawg nkaus phab ntsa thickness, P yog tsim siab, D yog sab nraud txoj kab uas hla, thiab S yog tso cai rau kev ntxhov siab ntawm qhov tsim kub. Tom qab xam qhov tsawg kawg nkaus uas yuav tsum tau muaj phab ntsa thickness, tus engineer ntxiv corrosion kuj (feem ntau yog 1.5-3.0 hli rau carbon steel) thiab xaiv cov txheej txheem siab dua tom ntej uas muab tsawg kawg yog tag nrho cov thickness yuav tsum tau.
Qhov kub thiab txias derating ho cuam tshuam rau qhov tso cai rau kev ntxhov siab. ASME Tshooj II Ntu D muab cov rooj kev ntxhov siab tso cai rau txhua yam khoom siv yeeb nkab ntawm qhov kub thiab txias. Piv txwv li, A106 Gr.B muaj qhov tso cai rau kev ntxhov siab ntawm 137.9 MPa ntawm 38℃tab sis tsuas yog 68.9 MPa ntawm 450 degree. Qhov kev txo qis 50% no txhais tau hais tias cov yeeb nkab txaus ntawm qhov kub thiab txias yuav xav tau lub sijhawm tuab dua ntawm qhov kub siab. Nco ntsoov xyuas qhov kev ntxhov siab uas tso cai rau ntawm qhov kub siab tshaj plaws ua haujlwm ua ntej ua tiav cov sijhawm xaiv.
Cov yam ntxwv ntawm kev nyab xeeb yog tsim rau hauv cov txiaj ntsig kev ntxhov siab uas tso cai. ASME B31.3 siv qhov kev nyab xeeb ntawm kwv yees li 3.5 ntawm qhov kawg tensile lub zog rau kev txiav txim siab tso cai. Lwm yam tseem ceeb muaj xws li cov yam ntxwv zoo rau cov yeeb nkab welded (feem ntau 0.85-1.0 nyob ntawm qhov vuam hom thiab qib tshuaj ntsuam xyuas) thiab cov khoom zoo rau cov khoom cam khwb cia. Cov xwm txheej no ua kom ntseeg tau tias lub sijhawm xaiv cov yeeb nkab muab cov npoo txaus tiv thaiv tsis ua haujlwm raws li txhua qhov kev cia siab ua haujlwm.
Pipe Schedule Selection Checklist
Kauj ruam 1:Txiav txim siab tsim qhov siab thiab qhov kub thiab txias ntawm qhov system. Cov no feem ntau teev nyob rau hauv daim duab qhia chaw thiab ntsuas (P&ID) lossis cov ntaub ntawv txheej txheem. Kauj Ruam 2: Txheeb xyuas cov khoom siv yeeb nkab raws li cov kua dej sib xws, txwv qhov kub thiab txias, thiab cov khoom siv tshuab. Kauj Ruam 3: Saib xyuas qhov kev ntxhov siab tso cai rau cov khoom xaiv ntawm qhov ntsuas kub ntawm ASME Tshooj II Ntu D. Kauj Ruam 4: xam qhov tsawg kawg nkaus uas yuav tsum tau muaj phab ntsa thickness siv Barlow's formula, ntxiv kev tiv thaiv corrosion, thiab xaiv lub sij hawm uas nws qhov tsawg kawg nkaus phab ntsa thickness (sau rau kev tsim kam rau ua) sib npaug los yog tshaj tus nqi xam.
Peb Muaj peev xwm muab khoom
ManufacturerPipe muab tag nrho cov txheej txheem yeeb nkab los ntawm SCH 5S txog XXS. Peb cov yeeb nkab seamless spans SCH 40 txog SCH 160 hauv qhov ntau thiab tsawg los ntawm 1/2 "mus rau 36". Peb welded yeeb nkab ntau lawm npog SCH 5 txog SCH 80 hauv qhov ntau thiab tsawg los ntawm 1/2 "mus rau 48". Peb kuj tseem muab cov uas tsis yog - qauv phab ntsa thickness customization rau tshwj xeeb tej yaam num uas yuav tsum tau intermediate phab ntsa qhov ntev. Tag nrho cov yeeb nkab tau muab nrog Daim Ntawv Pov Thawj Mill Test thiab tuaj yeem raug kuaj thib peb - tog.
Xav tau kev pab Pipe Schedule Assistance?
Hu rau peb pab neeg ua haujlwm engineering rau cov kws tshaj lij kev taw qhia thiab kev sib tw nqi ntawm txhua lub sijhawm cov yeeb nkab los ntawm SCH 5S txog XXS.
