1. Dab tsi yog qhov txawv ntawm ASTM A671 CF70 Class 73 kav?
Teb:
ASTM A671 Chav Kawm 73 sawv cev rau qhov tshwj xeeb txawv ntawmhluav taws xob-fusion-welded carbon steel kavnrog:
Ua kom muaj zog:Yam tsawg kawg yield zog ntawm73 ksi (503 MPa)
Fabrication Method:Longitudinal seam vuam los ntawm daim hlau (EFW txheej txheem)
Tsawg-Tsev Kev Ua Haujlwm:Certified rau kev pab mus rau-50 ° F (-45 ° F)
Lub peev xwm siab:Tsim los rau kev siv siab -siab cryogenic
Nco tseg:Cov chav kawm no feem ntau yog kev cai - xaj rau qhov kev xav tau tshwj xeeb.
2. Cov tshuaj muaj pes tsawg leeg thiab cov khoom siv?
Teb:
Qhov tseem ceeb alloy txwv (wt.% max):
| Element | Ntau yam | Lub hom phiaj |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.30% | Tswj hardness/weldability |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.35% | Txhim khu lub zog & toughness |
| Silicon (Si) | 0.10-0.35% | Deoxidizer rau weld zoo |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.035% | Tswj impurity |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.035% | Minimizes kub shortness |
Ceeb toom tshwj xeeb:Qee cov tuam txhab lag luam yuav ntxiv micro- alloys (piv txwv li, Nb, V) rau kev txhim kho cov khoom.
3. Cov khoom siv tshuab thiab cov txheej txheem kuaj?
Teb:
Qhov yuav tsum tau muaj:
Tensile zog:85-105 ksi (586-724 MPa)
Yield zog: Ntau dua lossis sib npaug rau 73 ksi (503 MPa)
Elongation:Ntau dua lossis sib npaug li 18% (ntawm 2 "gauge length)
Impact Testing:
Charpy V-ntaus ntawm-50 ° F (-45 ° F)
Yam tsawg kawg nkaus absorbed zog:20 ft -lb (27 J)avg.
Kev Xeem Ntxiv:
Hydrostatic xeem ntawm Ntau dua lossis sib npaug rau 1.5x tsim siab
Tsis yog-kev kuaj xyuas kev puas tsuaj (RT lossis UT ib Daim Ntawv Ntxiv X3)
4. Cov ntawv thov tseem ceeb thiab kev siv kev lag luam?
Teb:
Cov kav dej no yog qhov tseem ceeb rau:
Cryogenic Zog Systems
LNG liquefaction/regasification nroj tsuag
Ua kua hydrogen thauj pipelines
Kev ua tshuaj lom neeg
Ethylene cracker units
Ammonia tub yees systems
Fais fab Infrastructure
Supercritical CO₂ cycles nyob rau hauv advanced fais fab nroj tsuag
Qhov tseem ceeb Advantage:Khaws ductility ntawm qhov kub thiab txias thaum tiv taus siab sab hauv.
5. Kev sib piv nrog cov qauv yeeb nkab zoo sib xws?
Technical Comparison Table:
| Parameter | ASTM A671 CF73 | ASTM A672 B70 | API 5L X70 |
|---|---|---|---|
| Txheej txheem | EFW | EFW | Seamless / Welded |
| Yield (ksi) | 73 | 70 | 70 |
| Temp Range | -45℃rau +260 degree | -30℃rau +425 degree | Ambient |
| NDE Level | 100% RT / UT | Spot RT | Automated UT |
| Nqi Factor | Siab | Nruab nrab | Tsawg- Nruab nrab |
Kev Taw Qhia Xaiv:
Xaiv CF73 raucryogenic siab hlab ntsha
Nyiam A672 raunruab nrab- txheej txheem kub
API 5L cov khoom sivRoj/gas kis tau tus mob
