1. ASTM A671 CF65 Class 20 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CF65 Chav Kawm 20 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 20: Yam tsawg kawg nkaus yield zog ntawm20 ksi (138 MPa), haum raunruab nrab- mus rau - siab - cov ntawv thov cryogenic(piv txwv li, LNG piping, industrial gas storage, thiab chemical processing).
2. Dab tsi yog qhov kev tsim khoom thiab ntawv pov thawj?
Teb:
Vuam: EFW nrog qis-sulfur muab tub lim,100% kev tshuaj xyuas qhov muag + 50% RT (kev kuaj hluav taws xob).
Kev kho cua sov: Kev nyuaj 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 0.18%, Mn Tsawg dua lossis sib npaug li 0.90%, P / S Tsawg dua lossis sib npaug li 0.015%).
Cov khoom siv kho tshuab (yield ntau dua lossis sib npaug ntawm 20 ksi, tensile 85-110 ksi).
Impact tests ntawm-65℃F(min 40 ft-lb avg., 30 ft-lb tus neeg).
3. Chav Kawm 20 piv rau lwm chav ASTM A671 li cas?
Teb:
| Parameter | CF65 Chav Kawm 20 | CF65 Chav Kawm 10 | CF65 Chav Kawm 60 |
|---|---|---|---|
| Yield zog | 20 ksi (138 MPa) | 10ksi (69 MPa) | 60 ksi (414 MPa) |
| Daim ntawv thov | Nruab nrab - rau - siab siab | Tsawg-siab | Ultra-siab- siab |
| Nqi | Nruab nrab - txog - siab | Kev lag luam | Hwm |
4. Dab tsi yog qhov ntev thiab qhov kam rau ua?
Teb:
Txoj kab uas hla: 16 "-144" OD (rau kev lag luam thiab lub zog ua haujlwm).
Phab ntsa Thickness: Ua siab ntev± 10% nominal thickness(raws li ASTM A671).
Ntev: Feem ntau 40ft (12.2m), customizable mus txog 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) los yog FBE rau ib puag ncig hnyav.
Hybrid cathodic tiv thaiv (sacrificial + impressed tam sim no) rau faus kav.
Sab hauv:
FBE lossis ceramic - hloov cov ntaubrau chemical / abrasion kuj.
Kev tu:
Biannual ntse pigging nrogMFL (Magnetic Flux Leakage)rau kev ntes tawg.
