Sib piv nrog SA-387 Steel Phaj Qib 11 & 22
A387 Qib 22 Chav Kawm 1yog ib tug normalized chromium-molybdenum alloy steel phaj (2.25% Cr, 1% Mo) tsim rau siab - kub, siab - siab welded siab hlab ntsha. Muab nyob rau hauv qhov normalized los yog kev nyuaj siab-relieved mob, nws yog npaj rau fabrications qhov twg lub tiav lawm nkoj yuav undergo ib tug tag nrho Post-Weld Heat Treatment (PWHT) los tsim nws cov tempered microstructure zaum kawg, kev ntxhov siab, thiab kev pom zoo mechanical zog rau cov kev pab loj, xws li nyob rau hauv hydrocracker reactors thiab siab {8} ib puag ncig hydro.
Txheej txheem cej luam SA 387 Gr 11 / SA 387 Gr 22
Kev siv ntau dua ntawm cov qib no yog nyob rau hauv Refineries, Fais fab nroj tsuag, thiab qee qhov chaw ntawm Tshuaj Cog Khoom hauv ib puag ncig uas muaj qhov kub thiab txias thiab tsis muaj kev txhawj xeeb txog corrosion. Nyob rau hauv qis kawg ntawm qhov kub ntawm SA 387 Gr 11 (1150 ° F min tempering kub), thiab SA 387 Gr 22 (1250 ° F min tempering kub) yog siv. Cov qib no tuaj yeem teev nyob rau hauv chav kawm 1 lossis 2 thiab tseem tuaj yeem muab rau hauv Normalized & Tempered lossis Quenched thiab Tempered. Rau ib puag ncig hnyav dua peb tuaj yeem ua API 934 Kev Ntsuas txhawm rau ntxiv qib no.
Muab nyob rau hauv Normalized thiab Tempered los yog quenched thiab Tempered
Thickness ntawm 3/16 "- 10"
Kev sim ntxiv muaj rau simulate daim ntawv thov thiab ib puag ncig tej yam kev mob
Kev kub ntxhov siab kom haum rau API 934
Kev xav tau tshuaj
* Cov ntsiab lus sawv cev hauv feem pua
| Cov ntsiab lus % | ||
|---|---|---|
| TIAB SA 387 Qib 11 |
TIAB SA 387 Qib 22 |
|
| Cov pa roj carbon ntau: | ||
| Kev ntsuas kub | 0.05-0.17 | 0.05-0.15A |
| Kev tshuaj xyuas cov khoom | 0.04-0.17 | 0.04-0.15A |
| Manganese, max: | ||
| Kev ntsuas kub | 0.40-0.65 | 0.30-0.60 |
| Kev tshuaj xyuas cov khoom | 0.35-0.73 | 0.25-0.66 |
| Phosphorus, max: | ||
| Kev ntsuas kub | 0.025 | 0.025 |
| Kev tshuaj xyuas cov khoom | 0.025 | 0.025 |
| Sulfur, max: | ||
| Kev ntsuas kub | 0.025 | 0.025 |
| Kev tshuaj xyuas cov khoom | 0.025 | 0.025 |
| Silicon: | ||
| Kev ntsuas kub | 0.50-0.80 | 0.50 max |
| Kev tshuaj xyuas cov khoom | 0.44-0.86 | 0.50 max |
| Chromium: | ||
| Kev ntsuas kub | 1.00-1.50 | 2.00-2.50 |
| Kev tshuaj xyuas cov khoom | 0.94-1.56 | 1.88-2.62 |
| Molybdenum: | ||
| Kev ntsuas kub | 0.45-0.65 | 0.90-1.10 |
| Kev tshuaj xyuas cov khoom | 0.40-0.70 | 0.85-1.15 |
Tensile Requirements Rau Chav Kawm 1 Phaj
| TIAB SA 387 Qib 11 |
TIAB SA 387 Qib 22 |
|
|---|---|---|
| Tensile zog, ksi [MPa] | 60 rau 85 [415–585] ua. |
60 txog 85 [415 rau 585] |
| Yield zog min. Ksi [MPa] | 35 | 30 |
| Elongation hauv 8 nti. [200 mm], min. % | 19 | |
| Elongation hauv 2 nti. [50 mm], min. % | 22 | 18 |
| Txo thaj tsam, min% | 45 40 |
Tensile Requirements Rau Chav Kawm 2 Phaj
| TIAB SA 387 Qib 11 |
TIAB SA 387 Qib 22 |
|
|---|---|---|
| Tensile zog, ksi [MPa] | 75 txog 100 [515 rau 690] | 75-100 Nws [515 to 690] ib. |
| Yield zog min. ksi [MPal]/(0.2% offset) | 45 [310] | 45 [310] |
| Elongation hauv 8 nti. [200 mm], min. %B | 18 | … |
| Elongation hauv 2 nti. [50 mm], min. %B | 22 | 18 |
| Txo thaj tsam, min% | … | 45 40 |
1. Vim li cas ib tug engineer yuav qhia A387 Qib 22 Chav Kawm 1 es tsis yog Chav Kawm 2 rau lub nkoj siab?
Cov lus nug no tsom mus rau cov qauv tsim thiab kev tsim cov logic tom qab xaiv qhov softer, normalized condition of Class 1, feem ntau yog rau cov khoom uas yuav tsum tau welding dav thiab tom qab tag nrho cov kev kho cua sov.
2. Dab tsi yog qhov tseem ceeb tshaj plaws - cov kauj ruam tsim khoom tsim nyog rau A387 Qib 22 Chav Kawm 1 kom ua tiav nws cov khoom xav tau?
Cov lus nug no qhia txog lub luag haujlwm tseem ceeb ntawm qhov yuav tsum tau ua Post- Weld Heat Treatment (PWHT) txheej txheem uas hloov cov khoom siv hauv chav kawm 1 rau hauv lub nkoj nrog lub zog thiab tawv.
3. PWHT kub npaum li cas rau A387 Qib 22 Qib 1 txawv ntawm Qib 11 li cas?
Cov lus nug no tshawb txog cov txheej txheem vuam qhov sib txawv, vim tias cov ntsiab lus alloy siab dua ntawm Qib 22 yuav tsum muaj PWHT qhov kub thiab txias ntau dua los ua kom zoo rau lub microstructure.
4. Dab tsi yog qhov txiaj ntsig tseem ceeb ntawm kev siv A387 Qib 22 Chav Kawm 1 hauv kev pabcuam hydrogen hnyav?
Cov lus nug no tsom rau cov khoom siv tseem ceeb ntawm daim ntawv thov tsav tsheb, txuas nws 2.25Cr-1Mo chemistry rau nws qhov kev tiv thaiv zoo tshaj plaws rau kev kub siab hydrogen nres piv rau qis alloys.
5. Puas muaj kev pheej hmoo yog dab tsi yog A387 Qib 22 Chav Kawm 1 tsis muab PWHT zoo tom qab vuam?
Cov lus nug no hais txog qhov kev txhawj xeeb tseem ceeb ntawm kev nyab xeeb thiab kev ua tau zoo, tsom mus rau qhov tshwm sim ntawm kev tawm ntawm ib qho nyuaj, nkig microstructure nyob rau hauv qhov vuam kub- thaj tsam cuam tshuam.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.
