1. ASTM A671 CJE115 Class 11 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJE115 Chav Kawm 11 yog acryogenic{0}}qib hluav taws xob- fusion-welded (EFW) carbon steel yeeb nkabtsim rauqis-kev pabcuam kub(kev ua haujlwm kubTsawg dua lossis sib npaug ntawm -55℃F / -48 degree). Lub npe "Class 11" qhia tias aYam tsawg kawg nkaus lub zog ntawm 11 ksi (76 MPa), ntsuas lub zog thiab ductility rau sub-zero applications.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau dua lossis sib npaug rau 11 ksi (76 MPa)
Tensile zog:65-85 ksi (448-586 MPa)
Impact Test:Yuav tsum tau Charpy V-notch ntawm -55℃F/-48 degree
Tshuaj:
Cov pa roj carbon (C):Tsawg dua lossis sib npaug li 0.22%(tsawg carbon rau cryogenic toughness)
Manganese (Mn):0.70–1.40%(zoo rau kev ua haujlwm qis -T)
P/S: Tsawg dua lossis sib npaug li 0.020%(kev tswj nruj impurity)
3. Cov ntawv thov zoo li cas?
Teb:
LNG (liquefied natural gas) hloov cov kav dej
Cryogenic cia cov hlab ntsha
Tsawg-kub tshuaj ua haujlwm
Spacecraft kua oxygen systems
4. Nws Puas Piv rau Chav Kawm 10 thiab Chav Kawm 15?
Teb:
| Chav kawm | Yield zog | Kev Pabcuam Kub |
|---|---|---|
| Chav Kawm 10 | 10ksi (69 MPa) | Ntau dua lossis sib npaug rau -50℃F (-46 degree) |
| Chav Kawm 11 | 11 ksi (76 MPa) | Ntau dua lossis sib npaug rau -55℃F (-48 degree) |
| Chav Kawm 15 | 15 ksi (103 MPa) | Ntau dua lossis sib npaug rau -20℃F (-29 degree) |
5. Fabrication & Certification?
Teb:
Vuam:
Preheat:225℃F min. + PWHT(1150-1250 ° F)
Filler Hlau:AWS A5.28 ER90S-G
Kev sim:
Hydrostatic:1.75x tsim siab
100% radiography (RT) + kev ntsuam xyuas cuam tshuam
Ntawv pov thawj: ASTM A 671 + ASME B31.3
