1. ASTM A671 CB65 Chav Kawm 12 yog dab tsi?
TxujKhoom siv: ASTM A671hluav taws xob -fusion-welded (EFW) steel kavrau atmospheric thiab qis-kev pabcuam kub.
SIB CB65: QhiaQib Bnrog aYam tsawg kawg nkaus lub zog ntawm 65 ksi (448 MPa).
Chav Kawm 12: Qhia covchav kawm tsim khoom(Qeb 12 yuav tsum tau100% radiography kuajrau weld kev ncaj ncees).
2. Cov kav dej no feem ntau siv qhov twg?
Daim ntawv thov: Cryogenic systems (-50℃F/-45℃thiab qis dua), LNG chaw, tshuaj nroj tsuag, thiab cov hlab ntsha uas muaj zogsiab zog thiab qis -kub toughnesstseem ceeb.
3. Cov khoom tseem ceeb ntawm kev siv tshuab?
| Khoom | A671 CB65 Chav Kawm 12 |
|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 65 ksi (448 MPa) |
| Tensile zog | 85-110 ksi (586-758 MPa) |
| Impact Test | Yuav tsum tau (piv txwv li, Charpy V-notch ntawm qhov ntsuas kub) |
4. Nws ua li cas?
Txheej txheem: Hluav taws xob-fusion-welded (EFW) nrogpost-weld kev kho cua sov (PWHT)kom txo tau kev ntxhov siab.
Kev sim: Class 12 mandates100% radiographic kuajntawm welds thiab ntxiv nondestructive testing (NDT) rau qhov tsis xws luag.
5. Kev tiv thaiv corrosion & kev txwv?
Kev tiv thaiv: Feem ntau coated sab hauv / sab nraud (xws li, epoxy, FBE) rau corrosive ib puag ncig.
Kev txwv: Tsis haum rausiab -kev pabcuam kub (e.g., >650℃F / 343 degree) vim muaj kev txwv ntawm cov khoom siv.
