Ntxiv Technology: HIC TEST|NACE MR0175|Z15|Z25|Z35 |
Thickness: 6mm rau 300mm,
Dav: 1500mm txog 4050mm,
Ntev: 3000mm rau 15000mm
Tshuaj lom neeg muaj pes tsawg leeg tshuaj thiab cov neeg kho tshuab:
| A302 Qib B Cov Khoom Siv Tshuaj | |||||||
| Carbon, max | % | Manganese, Max | % | Silicon, max | % | Sulphur Max | % |
| 25mm lossis hauv qab | 0.2 | Kev Ntsuam Xyuas Kev Kub Kub | 1.15-1.50 | Kev Ntsuam Xyuas Kev Kub Kub | 0.15-0.40 | Tag nrho cov tuab | 0.035 |
| 25-50 hli | 0.23 | Cov tshuaj ntsuam xyuas | 1.07-1.62 | Cov tshuaj ntsuam xyuas | 0.13-0.45 | ||
| Tshaj 50mm | 0.25 | ||||||
| Molybdenum Max | % | Nickel Max | % | Phosphorus | % | ||
| Kev Ntsuam Xyuas Kev Kub Kub | 0.45-0.60 | Kev Ntsuam Xyuas Kev Kub Kub | … | Tag nrho cov tuab | 0.035 | ||
| Cov tshuaj ntsuam xyuas | 0.41-0.64 | Cov tshuaj ntsuam xyuas | … | ||||
| Cov Cuab Yeej Cuab Yeej ntawm A302 Qib B Hlau Phaj | A302 Qib B |
| Tensile lub zog, KIS [MPA] | 80-100 [550-690] |
| Pepred lub zog, min, KIS [MPA] | 50 [345] |
| Elongation nyob rau hauv 8 hauv . [200 hli], min,% | 15 |
| Elongation nyob rau hauv 2 hauv .} [50 mm], min,% | 18 |
Q1: Cov tshuaj lom neeg muaj pes tsawg leeg ntawm Astm A302 qib B txawv ntawm qib A?
Ntau dua manganese (1.15-1.50% vs 0.85-1.20% nyob rau qib A)
Cov ntsiab lus Molybdenum (0.20-0.30%)
Nreeb tswj kev tswj hwm:
Phosphorus tsawg dua lossis sib npaug rau 0.025% (vs tsawg dua lossis sib npaug rau 0.035% hauv qib a)
Sulfur tsawg dua lossis sib npaug rau 0.025% (vs tsawg dua lossis sib npaug rau 0.040% hauv qib A)
Cov Cuam Tshuam: Txhim Kho Cov Khoom Siv Yooj Yim thiab Tsawg-Kub Kev Lom Zem.
Q2: Dab tsi yog qhov tsawg kawg cov neeg kho mob tshuab rau qib b cov phiaj?
| Ntiag tug | Qhov toob kas | Kuaj Tus Qauv |
|---|---|---|
| Lub zog tensile | 585-760 mpa (85-110 ksi) | ASTM A370 |
| Paib lub zog | Ntau dua los yog sib npaug rau 415 MPa (60 ksi) | ASTM A370 |
| Elongation (2 ") | Ntau dua los yog sib npaug rau 17% | ASTM A370 |
| Charpy cuam tshuam | 34 -18 degree | ASTM A673 (zaus H) |
| Nco tseg: 20% muaj zog dua qib ib nrog stricter cuam tshuam lub zog . |
Q3: Vim li cas thiaj muaj qhab-nees b addressed rau hydropoprocessing reactors?
Hydrogen Kuj: Mo-carbides inhibit hic ntawm tsawg dua lossis sib npaug nrog 400℃/ 15mpa h₂ lub siab
NACE MR0175 ua rawsRau Sour Kev Pabcuam
ASME Tshooj VARII D D D D D D D D D D D D D D D D D D DEC.2 Pom zooRau cov kev tsim hluav taws xob siab
Kev siv: Reactor shells nyob rau hauv cov roj ua kom huv (e {.}, hydrocbackers).
Q4: Yuav ua li cas thaum tshav kub yuav tsum tau ua rau qib b Fabrication?
Yuav tsum ua ntu zus:
Li no: 910-940 Qib (tag nrho mo daws)
Quenching: Water spray for plates >50 hli thickness
Npau taws: 595-650℃× 1h / 25mm (min . 1 teev)
*Critical control: Cooling rate >28 Qib / Min ntawm 800-500 Qib kom tsis txhob muaj kev sib tw sib haum dab tsi {}}} *
Q5: Yuav ua li cas vuam colybables thiab cov txheej txheem tau teev tseg?
Vuam Raws Cai:
Preheat: 175-200℃(saib xyuas ntawm thermocouples)
Cov neeg tau txais kev:
Smws: aws e {9018- b3 (2.25Cr -1 mo) rau lub zog overmatch
Pom: f9p 4- eb3r flux / hlau combo
Thoob: 690 ± 15 Degree × 2H / 25mm (Max 690 Degurce kom tiv thaiv lub zog ploj)
Cim npe nrov: ASTM A302 Qib B rau Lub Siab Hlaws Siab PHAJ, Suav ASTM A302 Qib B Rau Siab Hlaws Mag Portters, Chaw muag khoom, Hoobkas
