1. ASTM A671 CJB115 Class 43 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJB115 Chav Kawm 43 yog apremium fais-fusion-welded (EFW) carbon steel yeeb nkabtsim rauultra-siab-siab thiab siab heev-kev nyuaj siab rau kev lag luam(Kev pabcuam kub siab dua lossis sib npaug rau **-20℃F /-29℃**). Lub npe "Class 43" qhia txog aYam tsawg kawg nkaus tawm lub zog ntawm 43 ksi (296 MPa), ua rau nws zoo tagnrho rau cov txheej txheem tseem ceeb uas yuav tsum tau muaj kev sib luag ntawm cov qauv kev ntseeg siab.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 43 ksi (296 MPa)
Tensile zog:125-145 ksi ({2}}-1,000 MPa)
Impact Test:Yuav tsum Charpy V-notchntawm qhov ntsuas kub tsim
Tshuaj:
Cov pa roj carbon (C):0.33–0.39%(optimized rau lub zog thiab weldability)
Manganese (Mn):1.50–1.80%(txhim kho toughness)
P/S: Tsawg dua lossis sib npaug li 0.015%(ultra-tsawg impurities)
3. Cov ntawv thov zoo li cas?
Teb:
Sib sib zog nqus- roj & roj ntau lawm tshuab(25, 000+ psi)
Nuclear fais fab nroj tsuag thawj coolant piping
High -siab hydraulic test stands
Kev tiv thaiv / aerospace siab hlab ntsha
4. Nws Puas Piv rau Chav Kawm 42 thiab Chav Kawm 45?
Teb:
| Chav kawm | Yield zog | Qhov tseem ceeb Advantage |
|---|---|---|
| Chav Kawm 42 | 42 ksi (290 MPa) | High -siab ntim |
| Chav Kawm 43 | 43 ksi (296 MPa) | Txhim khu kev qaug zog thiab tawg tsis kam |
| Chav Kawm 45 | 45 ksi (310 MPa) | Tshwj xeeb heev - siab |
5. Fabrication & Certification?
Teb:
Vuam:
Preheat:525℃F min. + PWHT(1275-1375℃F)
Kev tshuaj xyuas:100% phased-array UT + hardness daim ntawv qhia
Kev sim:
Hydrostatic:5x tsim siab
Fracture toughness kuaj(CTOD los yog J-integral)
Ntawv pov thawj: ASME Tshooj III Chav Kawm 1 nuclear kev ua raws cai
