1. ASTM A671 CJF115 Chav Kawm 21 yog dab tsi?
Txuj: EFW carbon steel yeeb nkab rauqis-kev pabcuam kub(-115 ° F / -81.7 ° C)
Chav Kawm 21: 21,000 psi (145 MPa)hydrostatic test siab
Cov yam ntxwv tseem ceeb:
"CJF115"=Charpy V-kev ntsuas ntsuas ntawm-115℃F(min{0}} ft-lb/45 J)
Muab ob npaug rau-kev kho cua sov zoo li qub
2. Nws feem ntau siv qhov twg?
Kev lag luam:
LNG liquefaction nroj tsuag
Cryogenic cia tanks
Zog:
Siab -pas kis tau tus mob
Tub yees system headers
3. Cov khoom siv?
Lub zog:
Tensile: Ntau dua lossis sib npaug rau 90 ksi (621 MPa)
Tawm tswv yim: Ntau dua lossis sib npaug rau 65 ksi (448 MPa)
Toughness:
Impact kuaj ntawm-115℃F
Min. elongation: 32%
Chemistry:
Carbon: Tsawg dua lossis sib npaug li 0.18%
S / P Tsawg dua lossis sib npaug li 0.010%
4. Cov txheej txheem tsim khoom?
Vuam:
Standard EFW nrog ncej-weld normalization
Kev sim:
Hydrostatic:21,000 psi(145 MPa)
NDE: RT lossis UT (100% kev pabcuam)
Zoo:
Standard dimensional tolerances
5. Fabrication xav tau?
Vuam:
Preheat: 450-650 ° F (232-343 ° F)
Kev xaiv PWHT rau kev pabcuam hnyav
Kev tsim:
Khoov txias (min. 18D radius)
Kev tshuaj xyuas:
Visual thiab NDE rau qhov project specs
