1. Weld Neck (Wn) Flange Daim Ntawv Thov
Thaum Twg Yuav Xaiv:
✔ Kev Ntsuas Siab(Chav 300 thiab siab dua)
✔ Cov Kev Pab Cuam Tshuam \/ Kev Pab Cuam Tshuam(Hydrogen, Hf Acid, Lethal Media)
✔ Huab cua sov heev (>400 degree f lossis<-50°F)
✔ High-co piping(Compressors, turbines)
✔ Cyclic Chaw thau khoom(Thermal expansion \/ Consaction)
✔ Tawv-Phab ntsa kav(Sij Hawm 80+} poltory)
Cov txiaj ntsig kev ua haujlwm:
• Kev faib tawm kev ntxhov siab: Taper Hub txo cov kev ntxhov siab los ntawm 30-40% vs li
• Kev Sib Tw Ntaus: Kev Seamless Tus ID Hloov Kev Tshawb Fawb Tsis Yooj Yim \/ Yaig
• Teb chaws radvegraphy compatibility: Tag Nrho Cov Kev Nkag Mus Rau Welds Cia NDE Kev Ntsuas
• Qeeb zog tsis kam: {2-3 x ntev txoj kev pabcuam lub neej nyob rau hauv cyclic loads
2. Npleem-rau (yog li) flange cov ntawv thov
Thaum Twg Yuav Xaiv:
✔ Tsawg-siab tshuab(Chav kawm 150-300)
✔ Cov kev pab cuam tsis muaj kev phom sij(Dej, huab cua, nqi hluav taws xob)
✔ Ib ntus teeb tsa(Txij nkawm bypasses)
✔ Chaw-Txwv Thaj Chaw(Qhov yooj yim nyem nkag)
✔ Tus nqi them tus nqi({40-50}% pheej yig dua WN)
Cov tswv yim:
• Yooj yim dua: {25-30% lub sijhawm so sai
• Kev hloov kho teb: Yooj yim rau kho txoj haujlwm ua ntej Weld kawg
• Txo Cov Lus Qhia: Tib Flange haum Ntau cov yeeb nkab lub sijhawm
3. Ncaj Nraim Sib Piv
| Chaw ua uas tsis tau haus | Weld Neck (WN) | Fella-rau (yog li) |
|---|---|---|
| Max siab | Chav Kawm 2500 | Hoob 600 |
| Qhov ntsuas kub ntau | {{0 {}} degree f rau 1500 degree f | -20 degree f rau 850 degree f |
| Vuam yuav tsum tau | Taub qab Weld (100% Pilletation) | 2 Fillet Welds (Sab Hauv \/ Sab Nraud) |
| Nde kev sib raug zoo | RT \/ siv tau | Kev tshuaj xyuas nkaus xwb |
| Kev Txhawb Nqa Yeeb Nkab | Kev txhawb nqa tus kheej | Yuav tsum muaj sab nraud txhawb nqa |
| Kev muaj peev xwm | 5x Txo tsis ua hauj lwm | Kev pheej hmoo siab dua ntawm cov voj voog siab |
| Cov Khoom Txhuam Khoom | Tsis muaj | Mus txog 30% tsawg dua steel |
4. Kev Lag Luam Cov Lus Taw Qhia
Roj & Roj:
• WN rau Wellheads, risers, cov kab compressor
• Yog li rau ntws vents, cov dej hluav taws xob
Tshuaj Nroj Tsuag:
• WN yuav tsum muaj kev ua tsov ua tuag rau ib asme B31.3
• Yog li siv tau rau cov qog tsis zoo
Lub zog tiam:
• WN required for steam >250psig
• yog li tso cai rau kev ua kom rov qab
Qhov Kev Ua Haujlwm Zoo Tshaj:Rau cov chav kawm 300 pab, ntau EPCS qhia WN flanges rau Nps 4 "thiab loj dua, thaum tso cai rau qhov ntau thiab tsawg.
5. Tus nqi tsom xam
• Cov Khoom Siv Nqi: Yog li txuag ~ $ 50 \/ nps 6 "chav kawm 150 (carbon hlau)
• Label tsub nqi: WN yuav tsum tau 2 x lub sijhawm vuam tab sis tsis tshua haum sijhawm
• Lub Neej Nqi: Wn feem ntau pheej yig ntev lub sij hawm vim muaj kev tu
Txoj cai ntawm tus ntiv tes xoo:Siv WN thaum lub kaw lus ua tau raws li ib qho ntawm:
Siab> Hoob 300 300
Qhov kub hnyav
Cyclic Service
Cov tshuaj lom \/ flammable media
Yeeb Nkab Phab Ntsa> Sijhawm 80
