HT PIPE is aSS 316H tubtus xa khoom nrog 15+ kev xa tawm.Tiv tauj pebkom paub ntau ntxiv thiab quotes dawb!
316Hyog austenitic stainless hlau yeeb nkab qib nrog cov ntsiab lus carbon ntawm 0.04% thiab 0.10%. Qhov ntawd tseem ceeb vim hais tias ntawm qhov kub siab tshaj li ntawm 425℃(800℃F), lub zog creep ntawm austenitic stainless tee ntau heev. Cov pa roj carbon ntau dua tso cai rau kev kho cua sov tshwj xeeb uas tsim cov qauv austenitic ruaj khov, uas yog qhov ua rau 316H nws tsis kam rau creep deformation nyob rau hauv cov thermal load.
Chemical Composition (qhov hnyav%)
| Element | 316H yuav tsum tau | 316l cav |
|---|---|---|
| Cov pa roj carbon (C) | 0.04 – 0.10 | 0.030 |
| Manganese (Mn) | max 2.00 Nws | 2.00 |
| Phosphorus (P) | 0.045 max | 0.045 |
| Sulfur (S) | 0.030 max | 0.030 |
| Silicon (Si) | 0.75 max | 0.75 |
| Chromium (Cr) | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (hli) | 2.00 – 3.00 | 2.00 – 3.00 |
| Nitrogen (N) | 0.10 max | 0.10 |
Mechanical Properties ntawm Chav Kub
| Khoom | ASTM A312 Cov Lus Qhia |
|---|---|
| Tensile zog | 515 MPa min (75 ksi) |
| Yield zog (0.2% offset) | 205 MPa min (30 ksi) |
| Elongation hauv 2 " | 35% min |
| Hardness | 217 HB / 95 HRB max |
Qhov 316H vs 316L Kev Txiav Txim: Dab tsi Tiag Tiag
Feem ntau kev sib piv nres ntawm cov ntsiab lus carbon. Nov yog ib feem uas feem ntau tau hla:
Kev khiav hauj lwm kub yog qhov tseem ceeb tsav tsheb.
Hauv qab 425 degree:316L feem ntau yog txaus. Nws cov pa roj carbon qis dua ua rau muaj kev tiv thaiv zoo dua rau intergranular corrosion hauv tshav kub- cuam tshuam thaj tsam ntawm welds.
Tshaj 425℃(sustained):316H yog tus qauv xaiv. Cov pa roj carbon ntau dua ua ke nrog cov kev daws teeb meem tsim nyog ua rau muaj kev nkag siab - tawg lub zog uas 316L tsuas tuaj yeem tsis sib xws ntawm qhov kub thiab txias.
Cyclic thermal tej yam kev mob (thermal cycling ntawm siab thiab qis kub):Ob qib xav tau kev soj ntsuam xyuas kom zoo. 316H ua haujlwm ruaj khov zoo dua, tsis muaj qib twg tshem tawm qhov kev pheej hmoo ntawm thermal qaug zog tawg yog tias tus qauv tsim tsis suav rau qhov sib txawv thermal expansion.
Vuam complexity yog tiag tiag nrog 316H.
Cov pa roj carbon ntau dua ua rau HAZ (tshav sov- thaj chaw cuam tshuam) cuam tshuam rau chromium carbide nag lossis daus yog tias cov vuam txias dhau qeeb. Hauv kev xyaum, qhov no txhais tau tias:
- Weld txheej txheem tsim nyog yuav tsum tau hais txog tom qab -weld cua sov yuav tsum tau kho rau cov tuab tuab.
- Rau nyias- cov yeeb nkab phab ntsa (seem 10S lossis qis dua), autogenous TIG lossis orbital vuam yam tsis muaj qhov muab tub lim tuaj yeem lees txais yam tsis muaj PWHT, nyob ntawm qhov project NDE cov cai.
- Rau cov phab ntsa hnyav (siab dua 19mm), PWHT feem ntau xav tau los ntawm engineering tsim qauv, uas txhais tau hais tias koj yuav tsum tau them nyiaj rau qhov muaj peev xwm ntawm lub cub tawg lossis hauv -situ tshav kub kho logistics ntawm qhov chaw.
Pipe Dimensions thiab Schedules raws li ASME B36.19M
ASME B36.19M npog qhov ntev rau stainless hlau yeeb nkab. Tsis zoo li B36.10M (carbon steel), B36.19M feem ntau suav nrog lub sijhawm 5S, 10S, 10, 20, 30, 40S, 40, 80S, 80, 120, 160, thiab XXS.
Feem ntau xaj 316H yeeb nkab qhov ntau thiab tsawg rau cov haujlwm ua haujlwm:
| NPS (inch) | Teem caij | OD (mm) | Phab ntsa (mm) | Daim ntawv thov |
|---|---|---|---|---|
| 1/2 | 40S | 21.34 | 2.77 | Instrument cua, txheej txheem me |
| 1 | 40S | 33.40 | 3.38 | Cov kav dej siv hluav taws xob |
| 2 | 40S | 60.33 | 3.91 | Main txheej txheem headers |
| 4 | 40S | 114.30 | 6.02 | Cov txheej txheem loj |
| 6 | 40S | 168.28 | 7.11 | Unit hloov kab |
| 8 | 40S | 219.08 | 8.18 | Siab -temp hydrocarbon |
| 10 | 40S | 273.05 | 9.27 | Hluav taws kub qhov hluav taws xob |
| 12 | 40S | 323.85 | 9.53 | Reactor effluent |
| 16 | 40S | 406.40 | 9.53 | Main kem hauv qab |
Rau refinery thiab petrochemical tej yaam num uas API 660 los yog cog engineering specifications siv, teem sij hawm 40S yog ib txwm tab sis yeej ib txwm paub tseeb hais tias tawm tsam koj cov kab kawm. Qee qhov haujlwm qhia txog lub sijhawm 80S lossis 160 rau siab -siab / siab- qhov kub thiab txias ua ke ntawm tib lub npe loj.
