1. A671 CC65 Class50 steel yeeb nkab yog dab tsi?
Teb:
A671 CC65 Class50 yog ibhluav taws xob -fusion-welded (EFW) steel yeeb nkabtsim rauqis-kev pabcuam kub, ua raws li ASTM A671 tus qauv.
CC65 ua: Qhia cov khoom qib (carbon steel nrog Charpy cuam tshuam kuaj ntawm -65℃F /-54℃).
Chav Kawm 50: Qhia qhov ntsuas siab (50 psi tsim siab).
Kev siv ntau: Cryogenic daim ntaub ntawv, LNG nroj tsuag, thiab cov kav dej txias.
2. Cov khoom siv tseem ceeb yog dab tsi?
Teb:
Tshuaj muaj pes tsawg leeg: Feem ntau carbon steel nrog tswj sulfur / phosphorus rau qis -kub toughness.
Mechanical Properties:
Lub zog tensile: Ntau dua lossis sib npaug ntawm 60 ksi (414 MPa)
Yield zog: Ntau dua los yog sib npaug rau 35 ksi (241 MPa)
Kev cuam tshuam ntawm -65℃F kom ntseeg tau tias brittleness kuj.
3. Nws ua li cas?
Teb:
Txheej txheem: Hluav taws xob- fusion vuam (EFW) nrog cov hlau muab tub lim, ua raws li kev tshaj tawm -weld heat treatment (PWHT).
Kev sim: 100% tsis yog- kuaj kev puas tsuaj (piv txwv li, radiography lossis ultrasonic) kom ntseeg tau tias qhov kev ntseeg ruaj khov.
4. Cov qauv thiab ntawv pov thawj siv li cas?
Teb:
Thawj StandardASTM A671 (EFW kav dej rau atmospheric / qis dua).
Ntxiv cov lej: ASME B31.3 (txheej txheem piping), tejzaum nws API 5L rau cov ntaub ntawv traceability.
5. Nws feem ntau siv qhov twg?
Teb:
Kev lag luam: Roj & roj (cryogenic thauj), tshuaj ua haujlwm, tub yees.
Piv txwv: LNG pipelines, ammonia cia, subzero coolant systems.
