1. ASTM A671 CJF115 Chav Kawm 11 yog dab tsi?
Txuj: EFW carbon steel yeeb nkab rauqis-kev pabcuam kub(-115 ° F / -81.7 ° C)
Chav Kawm 11: 11,000 psi (76 MPa)hydrostatic test siab
Cov yam ntxwv tseem ceeb:
"CJF115"=Charpy V-kev ntsuas ntsuas ntawm-115℃F(min{0}} ft-lb/23 J)
Tib -kev kho cua sov zoo li qub
2. Nws feem ntau siv qhov twg?
Kev lag luam:
LNG hloov pipelines
Cryogenic processing units
Zog:
Tsawg-rau- nruab nrab siab siab faib roj
Tub yees system headers
3. Cov khoom siv?
Lub zog:
Tensile: Ntau dua lossis sib npaug rau 65 ksi (448 MPa)
Tawm tswv yim: Ntau dua lossis sib npaug rau 40 ksi (276 MPa)
Toughness:
Impact kuaj ntawm-115℃F
Min. elongation: 22%
Chemistry:
Carbon: Tsawg dua lossis sib npaug rau 0.28%
S / P Tsawg dua lossis sib npaug li 0.030%
4. Cov txheej txheem tsim khoom?
Vuam:
Standard EFW nrog ncej-weld normalization
Kev sim:
Hydrostatic:11,000 psi(76 MPa)
NDE: RT lossis UT (100% kev pabcuam)
Zoo:
Standard dimensional tolerances
5. Fabrication xav tau?
Vuam:
Preheat: 250-450 ° F (121-232 ° C)
Kev xaiv PWHT rau kev pabcuam hnyav
Kev tsim:
Khoov txias (min. 7D radius)
Kev tshuaj xyuas:
Visual thiab NDE rau qhov project specs
