1. ASTM A671 CD80 Class 32 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CD80 Chav Kawm 32 yog ibhluav 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: Cov khoom siv qib yuav tsum tauCharpy V- ntsuas qhov cuam tshuam ntawm -80℃Fvalidate cryogenic toughness.
Chav Kawm 32: Yam tsawg kawg nkaus yield zog ntawm32 ksi (221 MPa), engineered raunruab nrab-rau-siab-siab cryogenic systems(piv txwv li, LNG liquefaction units, hydrogen cia nkoj, industrial gas pipelines).
2. Dab tsi yog qhov kev tsim khoom thiab ntawv pov thawj?
Teb:
Vuam: EFW txheej txheem nrog ultra- qis- sulfur muab tub lim,100% radiography (RT) + phased-array UT (PAUT)rau qhov tsis xws luag - dawb welds.
Kev kho cua sov: Normalized los yog quenched & tempered rau optimized grain qauv.
Daim ntawv pov thawj: Mill test reports (MTRs) yuav tsum muaj xws li:
Cov tshuaj muaj pes tsawg leeg (piv txwv li, C Tsawg dua lossis sib npaug li 0.22%, Mn Tsawg dua lossis sib npaug li 1.70%, microalloyed nrog Nb / V / Ti).
Mechanical zog (yield zog ntau dua los yog sib npaug rau 32 ksi, tensile zog 85-105 ksi).
Impact test results at-80℃F(yam tsawg kawg 35 ft-lb nruab nrab lub zog nqus).
3. Chav Kawm 32 piv rau lwm chav ASTM A671 li cas?
Teb:
| Parameter | CD80 32 | CD80 Hoob 20 | CD80 60 |
|---|---|---|---|
| Yield zog | 32 ksi (221 MPa) | 20 ksi (138 MPa) | 60 ksi (414 MPa) |
| Daim ntawv thov | Siab -siab cryogenic | Nruab nrab -siab | Ultra-siab- siab |
| Nqi | Nruab nrab - txog - siab | Nruab nrab -ntaus | 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 kev siv hluav taws xob).
Phab ntsa Thickness: Ua siab ntev± 10% nominal thickness(raws li ASTM A671).
Ntev: Feem ntau 40ft (12.2m), customizable mus txog80 ft (24.4 m)rau txo cov pob qij txha.
5. Yuav ua li cas txhawm rau tiv thaiv corrosion thiab kev nyab xeeb ntawm kev ua haujlwm?
Teb:
Sab nraud:
3 LPE txheej(3-txheej polyethylene) rau faus / subsea pipelines.
IoT- qhib kev tiv thaiv cathodic rau - lub sijhawm saib xyuas.
Sab hauv:
FBE lossis ceramic - hloov cov ntaub ntawv rau hydrogen tsis kam.
Kev tu:
Biannual ntse pigging nrogMFL + ECA (Eddy Current Array)rau kev ntes tawg.
