1. ASTM A671 CJF115 Chav Kawm 30 yog dab tsi?
Txuj: EFW carbon steel yeeb nkab rautseem ceeb tsawg-kev pabcuam kub(-115 ° F / -81.7 ° C)
Chav Kawm 30: 30,000 psi (207 MPa)hydrostatic test siab
Cov yam ntxwv tseem ceeb:
"CJF115"=Charpy V-kev ntsuas ntsuas ntawm-115℃F(min{0}} ft-lb/68 J)
Triple-normalized + tempering kev kho cua sov
2. Nws feem ntau siv qhov twg?
Kev lag luam:
LNG export davhlau ya nyob twg lub ntsiab pipelines
Cryogenic kub exchanger systems
Zog:
Ultra-siab- kis tau tus mob gas
Subzero tub yees cov nroj tsuag
3. Cov khoom siv?
Lub zog:
Tensile: Ntau dua lossis sib npaug rau 110 ksi (758 MPa)
Tawm tswv yim: Ntau dua lossis sib npaug rau 85 ksi (586 MPa)
Toughness:
Tag nrho - lub cev cuam tshuam daim ntawv qhia ntawm-115℃F
Min. elongation: 40%
Chemistry:
Carbon: Tsawg dua lossis sib npaug li 0.12%
S / P Tsawg dua lossis sib npaug li 0.004%
4. Kev tsim khoom siv tshuab?
Vuam:
EFW nrog triple normalization + tempering
Kev sim:
Hydrostatic:30,000 psi(207 MPa)
NDE: RT + UT + TOFD (100% kev pab them nqi)
Zoo:
Laser -scanned dimensional verification
5. Fabrication raws tu qauv?
Vuam:
Preheat: 600-800 ° F (316-427 ° C)
Yuav tsum tau PWHT rau tag nrho cov thicknesses
Kev tsim:
Khoov txias (min. 30D radius)
Kev tshuaj xyuas:
Tag Nrho NDE + hardness + microstructure tsom xam
