1. ASTM A671 CD80 Class 12 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CD80 Chav Kawm 12 yog ib qhohluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rauqis-kev pabcuam kub(hauv qab-80 ° F / -62 ° C). Cov ntsiab lus tseem ceeb:
cd80 ua: Cov khoom siv qib yuav tsum tauCharpy V- ntsuas qhov cuam tshuam ntawm -80℃Flos xyuas kom meej cryogenic toughness.
Chav Kawm 12: Yam tsawg kawg nkaus yield zog ntawm12 ksi (83 MPa), haum raulow-cov ntaub ntawv siv cryogenic(piv txwv li, kua nitrogen pipelines, industrial txias cia systems).
2. Dab tsi yog qhov kev tsim khoom thiab ntawv pov thawj?
Teb:
Vuam: EFW txheej txheem nrog muab tub lim hlau,100% radiography (RT) lossis kuaj ultrasonic (UT)rau weld kev ncaj ncees.
Kev kho cua sov: Kev ntxhov siab-relieved los yog normalized los txhim kho qis -kub ductility.
Daim ntawv pov thawj: Mill test reports (MTRs) suav nrog:
Cov tshuaj muaj pes tsawg leeg (piv txwv li, C Tsawg dua lossis sib npaug li 0.30%, Mn Tsawg dua lossis sib npaug li 1.30%).
Mechanical zog (yield zog ntau dua los yog sib npaug rau 12 ksi, tensile zog 48-68 ksi).
Impact test results at-80℃F.
3. Chav Kawm 12 piv rau lwm chav ASTM A671 li cas?
Teb:
| Parameter | CD80 Chav Kawm 12 | CD80 Hoob 20 | CD80 60 |
|---|---|---|---|
| Yield zog | 12 ksi (83 MPa) | 20 ksi (138 MPa) | 60 ksi (414 MPa) |
| Daim ntawv thov | Tsawg- siab cryogenic | Nruab nrab -siab | Siab -siab cryogenic |
| Nqi | Tsawg-rau- nruab nrab | Nruab nrab -ntaus | Hwm |
4. Dab tsi yog qhov ntev thiab qhov kam rau ua?
Teb:
Txoj kab uas hla: 16 "-120" OD (tus qauv siv rau kev lag luam).
Phab ntsa Thickness: Ua siab ntev± 10% nominal thickness(raws li ASTM A671).
Ntev: Feem ntau 40ft (12.2m), customizable mus txog 60ft.
5. Yuav ua li cas txhawm rau tiv thaiv corrosion thiab ua haujlwm ntev?
Teb:
Sab nraud:
Epoxy los yog polyethylene txheejrau qhov chaw nyob sab hauv / me me.
Cathodic tiv thaiv rau faus installation.
Sab hauv:
FBE hauv ob sab phlu rau tshuaj tiv thaiv (piv txwv li, ammonia-raws li tub yees).
Kev tu: Kev tshuaj xyuas txhua xyoo rau txheej txheej kev ncaj ncees.
