1. Dab tsi txhais tau tias ASTM A671 CH115 Class 41 kav?
Teb:Cov no yoghluav taws xob-fusion-welded (EFW) carbon steel kavtsim raulow-kub thiab siab -siabdaim ntawv thov.
TSI 115: Qhia meej txog cov tshuaj muaj pes tsawg leeg (Mn siab dua, tswj S / P rau toughness).
Chav Kawm 41: Qhia txog kev ntsuas hydrostatic siab ntawm41,000 psi(siab tshaj hoob 40).
2. Cov kav dej no feem ntau siv nyob qhov twg?
Teb:
Cryogenic systems(LNG cia, -46℃/ -50℃F kev pabcuam).
Offshore roj / roj platforms(subsea pipelines).
Kev tsim hluav taws xob(txias tshuab nyob rau hauv siab).
3. Lawv txawv li cas ntawm Chav Kawm 40 kav dej?
Teb:
Kev ntsuas siab: Chav Kawm 41 withstands1,000 psi siab duahydrostatic siab.
Kev sim: Kev soj ntsuam nruj dua tsis muaj kev puas tsuaj (NDE) qhov yuav tsum tau ua rau kev ruaj ntseg vuam.
4. Cov yam ntxwv tseem ceeb ntawm kev siv tshuab?
Teb:
Tensile zog: Ntau dua lossis sib npaug rau 70 ksi (485 MPa).
Yield zog: Ntau dua lossis sib npaug rau 40 ksi (275 MPa).
Impact test: Charpy V-ntaus ntawm-50 ° F / -45 ° C(kom ntseeg tau tias brittleness kuj).
5. Kev ntsuas kev tswj xyuas zoo?
Teb:
Yuav tsum xeem: 100% radiography (RT) + kuaj hydrostatic.
Daim ntawv pov thawj: Mill Test Reports (MTRs) rau traceability.
Kev ua raws li teb: ASME B31.3 rau cov qauv kev teeb tsa.
