1. ASTM A671 CJB115 Class 41 Steel Pipe yog dab tsi?
Teb:ASTM A671 CJB115 Chav Kawm 41 yog atshwj xeeb hluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rauultra-siab-siab thiab siab- kev siv kev ntxhov siab(kev pabcuam kub saum toj no-20 ° F / -29 ° C). Lub npe "Class 41" qhia tias aYam tsawg kawg nkaus tawm lub zog ntawm 41 ksi (283 MPa), ua rau nws haum rau huab kev lag luam ib puag ncig.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 41 ksi (283 MPa)
Tensile zog:115-135 ksi (793-931 MPa)
Impact Test:Yuav tsum tau(Charpy V-notch ntawm kev khiav hauj lwm kub)
Tshuaj:
Cov pa roj carbon (C):Tsawg dua lossis sib npaug li 0.35%(optimized tshuav nyiaj li cas rau lub zog / weldability)
Manganese (Mn):1.40-1.70%(txhim kho toughness)
P/S: Tsawg dua lossis sib npaug li 0.018%(ultra-tsawg impurities)
3. Cov ntawv thov zoo li cas?
Teb:
Nuclear reactor auxiliary systems
Deepwater roj & roj ntau lawm ntoo(15, 000+ psi)
Siab -lub zog physics siab hlab ntsha
Tub rog hydraulic systems
4. Nws piv rau Class 40 thiab Class 45 li cas?
Teb:
| Chav kawm | Yield zog | Qib Kev Ua Haujlwm |
|---|---|---|
| Chav Kawm 40 | 40 ksi (276 MPa) | Ultra-siab- siab |
| Chav Kawm 41 | 41 ksi (283 MPa) | Txhim kho siab / cyclic loading |
| Chav Kawm 45 | 45 ksi (310 MPa) | Tshwj xeeb heev |
5. Fabrication Requirements?
Teb:
Vuam:Preheat (475℃F min.) + PWHT(1225-1325℃F) +100% automated UT
Kev sim:Hydrostatic (4x tsim siab) + fracture mechanics tsom xam
Kev tsim: Kub sib sau nrog kev ntxhov siab
Ntawv pov thawj: ASME Section III Nuclear Class 1 cov ntaub ntawv
