1. ASTM A671 CC70 Class 22 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CC70 Chav Kawm 22 yog ibhluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rauqis-kev pabcuam kub(hauv qab-70 ° F / -57 ° C). Cov ntsiab lus tseem ceeb:
CC70 ua: Cov ntaub ntawv qib nrog Charpy V- qhov ntsuas qhov cuam tshuam ntawm-70℃Fkom toughness.
Chav Kawm 22: Yam tsawg kawg nkaus yield zog ntawm22 ksi (152 MPa), haum rau nruab nrab - kev siv siab.
Daim ntawv thov:Cryogenic cia, petrochemical nroj tsuag, thiab subzero ib puag ncig.
2. Nws tsim thiab kuaj li cas?
Teb:
Vuam txheej txheem: EFW nrog cov hlau muab tub lim, 100% radiographic tshuaj xyuas (RT) rau kev ntseeg siab.
Kev kho cua sov: Kev ntxhov siab-relived los yog normalized kom tau raws li qhov tsawg-kub ductility yuav tsum tau.
Kev sim: Yuav tsum tauCharpy impact testsntawm -70℃F, ntsuas hydrostatic siab, thiab tshuaj ntsuam xyuas ib ASTM A671.
3. Dab tsi yog qhov txawv ntawm CC70 Class 22 thiab CC65 Class 72?
Teb:
| Parameter | CC70 22 | CC65 qeb 72 |
|---|---|---|
| Kev ntsuas kub | -70 ° F (-57 ° C) | -65 ° F (-54 ° F) |
| Yield zog | 22 ksi (152 MPa) | 72 ksi (500 MPa) |
| Daim ntawv thov | Tsawg-siab cryogenic systems | Siab -lub zog cryogenic pipelines |
4. Dab tsi yog qhov qauv thiab qhov kam rau ua?
Teb:
Txoj kab uas hla: Feem ntau16 "rau 120" OD(loj - txoj kab uas hla).
Phab ntsa Thickness: Nws txawv ntawm qhov tsim; kam rau ua raws li ASTM A671 (± 10% nominal thickness).
Ntev: Txuj40ft (12.2m), tab sis kev cai ntev muaj.
5. Yuav ua li cas tiv thaiv corrosion hauv A671 CC70 Class 22 kav?
Teb:
Txheej txheej:
Sab nraud: 3LPE (3- txheej polyethylene) los yog FBE (fusion-bonded epoxy).
Sab hauv: Cement hauv ob sab phlu lossis epoxy txheej rau tshuaj tiv thaiv.
Kev tiv thaiv Cathodic: Qhov tseem ceeb rau faus cov kav dej kom txo tau cov galvanic corrosion.
