1. ASTM A671 CJB115 Class 51 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJB115 Chav Kawm 51 yog atshwj xeeb hluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rauultra- siab heev thiab kev siv tseem ceeb hauv kev lag luam(Kev pabcuam kub siab dua lossis sib npaug rau **-20℃F /-29℃**). Lub npe "Class 51" qhia txog aTsawg tshaj tawm lub zog ntawm 51 ksi (352 MPa), ua rau nws yog ib qhov siab tshaj - cov kav dej hauv CJB115 series rau lub hom phiaj- cov tshuab tseem ceeb.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 51 ksi (352 MPa)
Tensile zog:145-165 ksi (1,000-1,138 MPa)
Impact Test:Yuav tsum Charpy V-notchntawm qhov ntsuas kub tsim
Tshuaj:
Cov pa roj carbon (C):0.36–0.43%(zoo rau ultra-lub zog siab)
Manganese (Mn):1.65–1.95%(Txhim kho toughness thiab hardenability)
P/S: Tsawg dua lossis sib npaug li 0.008%(ultra-tsawg impurities rau weld kev ncaj ncees)
3. Cov ntawv thov zoo li cas?
Teb:
Deepwater roj & roj qhov taub(35, 000+ psi)
Nuclear fusion reactor ntim tshuab
Aerospace propulsion test rigs
Tub rog hyperbaric Chambers
4. Nws Puas Piv rau Chav Kawm 50 thiab Chav Kawm 55?
Teb:
| Chav kawm | Yield zog | Performance Ntug |
|---|---|---|
| Chav Kawm 50 | 50 ksi (345 MPa) | Heev - tus qauv siab |
| Chav Kawm 51 | 51 ksi (352 MPa) | Txhim khu kev puas tsuaj |
| Chav Kawm 55 | 55 ksi (379 MPa) | Kev cai ultra-siab-kev ua tau zoo |
5. Fabrication & Certification?
Teb:
Vuam:
Preheat:575℃F min. + PWHT(1325-1425 ° F)
Kev tshuaj xyuas:100% phased-array UT + radiography + hardness mapping
Kev sim:
Hydrostatic:6x tsim siab
Fracture mechanics kuaj(CTOD/J-integral)
Ntawv pov thawj: ASME Section III Class 1 + NQA-1 nuclear compliance
