1. ASTM A671 CJP115 Chav Kawm 12 yog dab tsi?
A carbon steel hluav taws xob-fusion-welded (EFW) yeeb nkabraukev pabcuam cryogenic(-115℃F/-82℃) thiab cov ntawv thov siab.
CJP 115: Qhia chemistry (zoo ib yam li API 5L B) thiabCharpy V- ntsuas qhov cuam tshuam ntawm -115℃F.
Chav Kawm 12: Hydrostatic xeem siab ntawm1,200 psi (8.3 MPa).
2. Cov khoom siv tseem ceeb?
Yield zog: Ntau dua lossis sib npaug rau 35 ksi (240 MPa)
Tensile zogUa haujlwm siab: 60-85 ksi (415-585 MPa)
Impact toughness: Yuav tsum tau ntawm-115℃F(simulated arctic tej yam kev mob)
Kev kho cua sov: Normalized rau kev txhim kho grain qauv
3. Cov ntawv thov zoo li cas?
LNG export / ntshuam terminals
Polar cheeb tsam roj & roj pipelines
Cryogenic cia systems(piv txwv li, kua nitrogen, ethylene)
4. Cov kev cai tsim khoom?
Ob -welded seamsnrog100% radiographic tshuaj xyuas
Chemistry tswj: Max 0.025% S / P rau weldability
Yuav tsum xeemTug: Hydrostatic + Charpy cuam tshuam (ASTM A370)
5. Nws piv li API 5L X42 li cas?
Zoo sib xws zogtab sis superiorlow -kub toughness
Kev tshuaj xyuas nruj dua(EFW vs. seamless/SAW hauv API 5L)
Tsawg sulfur cov ntsiab lusrau kev pabcuam cryogenic
