1. ASTM A671 CD80 Class 60 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CD80 Chav Kawm 60 yog asiab -lub zog hluav taws xob- fusion-welded (EFW) carbon steel yeeb nkabtsim rauultra-low- 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℃Fvalidate cryogenic toughness.
Chav Kawm 60: Yam tsawg kawg nkaus yield zog ntawm60 ksi (414 MPa), engineered rauultra-siab-siab cryogenic systems(piv txwv li, LNG cia tanks, hydrogen thauj pipelines, thiab aerospace cryogenic roj systems).
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 ultrasonic kuaj (PAUT)rau qhov tsis xws luag - dawb welds.
Kev kho cua sov: quenched & tempered kom optimize qis -kub ductility.
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 0.10%, Mn Tsawg dua lossis sib npaug li 2.80%, microalloyed nrog Nb / V / Ti).
Cov khoom siv hluav taws xob (yield zog Ntau dua lossis sib npaug ntawm 60 ksi, tensile zog 150-180 ksi).
Impact test results at-80℃F(tsawg kawg 100 ft-lb nruab nrab lub zog nqus).
3. Chav Kawm 60 piv rau lwm chav ASTM A671 li cas?
Teb:
| Parameter | CD80 60 | CD80 40 | cd80 qib 70(Prototype) |
|---|---|---|---|
| Yield zog | 60 ksi (414 MPa) | 40 ksi (276 MPa) | 70 ksi (483 MPa) |
| Daim ntawv thov | Ultra-siab- siab cryogenic | Siab -siab cryogenic | Kev sim tshuab |
| Nqi | Hwm | Siab | Kev xaiv |
4. Dab tsi yog qhov ntev thiab qhov kam rau ua?
Teb:
Txoj kab uas hla: 24"–160" OD (rau loj- nplai kev lag luam thiab lub zog ua haujlwm).
Phab ntsa Thickness: Ua siab ntev± 5% nominal thickness( nruj tshaj plaws hauv ASTM A671).
Ntev: Feem ntau 40ft (12.2m), customizable mus txog120 ft (36.6 m)rau txo qhov welds.
5. Yuav ua li cas txhawm rau tiv thaiv corrosion thiab ua haujlwm ntev?
Teb:
Sab nraud:
3 LPP txheej(3-txheej polypropylene) rau qhov chaw hnyav (xws li subsea, Arctic).
Hybrid cathodic tiv thaiv (sacrificial anode + impressed tam sim no).
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.
