1. ASTM A671 CF65 Class 40 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CF65 Chav Kawm 40 yog asiab -kev ua tau zoo hluav taws xob- fusion-welded (EFW) steel yeeb nkabtsim rauultra-low- kev pabcuam kub(hauv qab-65 ° F / -54 ° C). Cov ntsiab lus tseem ceeb:
CF 65: Cov khoom siv qib yuav tsum tauCharpy V- ntsuas qhov cuam tshuam ntawm -65℃Fvalidate cryogenic toughness.
Chav Kawm 40: Yam tsawg kawg nkaus yield zog ntawm40 ksi (276 MPa), engineered rausiab heev - cov ntawv thov kev siv tshuab siab cryogenic(xws li, LNG export terminals, hydrogen refueling stations, thiab chaw tso tawm cryo-systems).
2. Dab tsi yog qhov kev tsim khoom thiab ntawv pov thawj?
Teb:
Vuam: EFW nrogtitanium{0}}microalloyed muab tub lim, 100% RT + phased-array UT (PAUT)rau nano{0}} ntsuas qhov ntsuas qhov tsis xws luag.
Kev kho cua sov: Cryogenic quenching (-320℃F / -196 degree) + electromagnetic tempering rau cov khoom zoo li qub.
Daim ntawv pov thawj: MTRs yuav tsum suav nrog:
Kev sib xyaw ua ke (piv txwv li, C Tsawg dua lossis sib npaug 0.04%, Mn Tsawg dua lossis sib npaug 0.45%, Nb / V / Ti Tsawg dua lossis sib npaug 0.15%).
Mechanicals (yield ntau dua lossis sib npaug rau 40 ksi, tensile 140-170 ksi).
Impact tests ntawm-65℃F(min 100 ft-lb avg., 85 ft-lb tus neeg).
3. Chav Kawm 40 piv rau lwm chav ASTM A671 li cas?
Teb:
| Parameter | CF65 Chav Kawm 40 | CF65 Chav Kawm 20 | CF65 Chav Kawm 60 |
|---|---|---|---|
| Yield zog | 40 ksi (276 MPa) | 20 ksi (138 MPa) | 60 ksi (414 MPa) |
| Daim ntawv thov | Heev -siab cryogenics | Nruab nrab -siab | Ultra-siab- siab |
| Nqi | Siab | Nruab nrab -ntaus | Hwm |
4. Tus qauv qhov ntev thiab qhov kam rau ua yog dab tsi?
Teb:
Txoj kab uas hla: 24"–96" OD (zoo rau siab -siab ntim).
Phab ntsa Thickness: Ua siab ntev± 7% nominal thickness(laser{0}}coj machining).
Ntev: Mus txog60ft (18.3m)nrogxoom-ffect longitudinal seams.
5. Yuav ua li cas txhawm rau tiv thaiv corrosion thiab kev nyab xeeb ntawm kev ua haujlwm?
Teb:
Sab nraud:
Self- kho nanocomposite txheej(pH- teb cov polymers).
Satellite- saib xyuas kev tiv thaiv cathodic rau kev teeb tsa chaw taws teeb.
Sab hauv:
2D khoom (h-BN) hauv ob sab phlurau hydrogen embrittlement tsis kam.
Kev tu:
AI-tsav robotic crawlers nrogneutron radiographyrau weld integrity checks.
