1. ASTM A671 CF65 Class 33 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CF65 Chav Kawm 33 yog ib qhohluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rauqis-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 33: Yam tsawg kawg nkaus yield zog ntawm33 ksi (228 MPa), engineered rausiab -cov ntawv thov kev siv tshuab siab cryogenic(piv txwv li, LNG cia tso tsheb hlau luam, hydrogen compression systems, thiab chemical processing pipelines).
2. Dab tsi yog qhov kev tsim khoom thiab ntawv pov thawj?
Teb:
Vuam: EFW nrog ultra- qis sulfur muab tub lim hlau,100% kev tshuaj xyuas qhov muag + 100% RT (kev kuaj hluav taws xob).
Kev kho cua sov: Normalized los yog kev ntxhov siab-relieved (yuav tsum tau rau txhua thicknesses).
Daim ntawv pov thawj: MTRs yuav tsum suav nrog:
Kev sib xyaw ua ke (piv txwv li, C Tsawg dua lossis sib npaug li 0.07%, Mn Tsawg dua lossis sib npaug li 0.55%, P / S Tsawg dua lossis sib npaug li 0.001%).
Cov khoom siv kho tshuab (yield ntau dua lossis sib npaug ntawm 33 ksi, tensile 125-150 ksi).
Impact tests ntawm-65℃F(min 80 ft-lb avg., 70 ft-lb tus neeg).
3. Chav Kawm 33 piv rau lwm chav ASTM A671 li cas?
Teb:
| Parameter | CF65 Chav Kawm 33 | CF65 Chav Kawm 20 | CF65 Chav Kawm 60 |
|---|---|---|---|
| Yield zog | 33 ksi (228 MPa) | 20 ksi (138 MPa) | 60 ksi (414 MPa) |
| Daim ntawv thov | Siab -siab cryogenics | Nruab nrab -siab | Ultra-siab- siab |
| Nqi | Hwm | Nruab nrab -ntaus | Siab |
4. Dab tsi yog qhov ntev thiab qhov kam rau ua?
Teb:
Txoj kab uas hla: 16 "-144" OD (tus qauv muaj ntau yam).
Phab ntsa Thickness: Ua siab ntev± 10% nominal thickness(raws li ASTM A671).
Ntev: Feem ntau 40ft (12.2m), txuas mus rau 120ft (36.6m).
5. Yuav ua li cas txhawm rau tiv thaiv corrosion thiab ua haujlwm ntev?
Teb:
Sab nraud:
3 LPE txheej(3-txheej polyethylene) rau corrosive ib puag ncig.
Hybrid cathodic tiv thaiv rau faus pipelines.
Sab hauv:
FBE los yog polyurethane hauv ob sab phlurau chemical / abrasion kuj.
Kev tu:
Kev ntsuam xyuas ultrasonic thickness txhua xyoo (UT) + ntse pigging rau kev kuaj pom tsis raug.
