1. ASTM A671 CB70 Chav Kawm 22 yog dab tsi?
TxujQauv: ASTM A671ultra-siab- siab cryogenicEFW kav dej raukev lag luam loj thiab subsea siv.
Ntsiab Specifications:
70 ksi (483 MPa) yield zog tsawg kawg nkausntawm-50 ° F (-45 ° F).
Tsim Siab: Mus txog7,250 psi (500 bar)(Qeb 22 ntsuam xyuas).
Khoom siv: Carbon -manganese steel nrogmicro{0}}alloying (Nb/V/Ti) + Ni / Cr rau kev txhim kho corrosion kuj.
2. Cov ntawv thov
Roj & Roj:
Deepwater subsea pipelines (Ntau dua lossis sib npaug li 3,000m qhov tob).
Siab -cov pa roj txhaj tshuaj (LNG cov nroj tsuag).
Kev lag luam:
Cryogenic hypercompressors (-50℃F txog 750℃F).
Nuclear / fais fab nroj tsuag siab - cov kab txias txias.
3. Cov Khoom Siv Khoom & Kev Ntsuas
| Khoom | Kev xav tau | Test Standard |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug li 70 ksi ntawm-50 ° F (-45 ° F) | ASTM A 370 Cov Lus Qhia Tshwj Xeeb |
| Impact Toughness | Ntau dua lossis sib npaug li 30 ft-lb (41 J) ntawm-50℃F | ASTM A673 (Charpy V) |
| Hydrostatic Test | 4.5x tsim siab (ib chav kawm 22) | ASTM A671 Tshooj 12 |
| NDT (UT/RT/MT/PT) | 100% weld + puag hlau tshuaj xyuas | ASTM E 317 / E94 / E709 / E1417 / ASTM E317 / E94 / E709 / E1417 / ASTM E317 / E94 / E709 / E1417 / ASTM E317 / E94 / E709 / E1417 / ASTM E317 / E94 / E709 / E1417 |
4. Kev tsim khoom & ntawv pov thawj
Txheej txheem:
Hluav taws xob fusion vuamnrogPWHT + Q&T (Quench & Temper).
Thermomechanical tswj kev ua haujlwm (TMCP)rau grain refinement.
Daim ntawv pov thawj:
Ua raws liASME B31.3, API 5L PSL2, thiabDNV-OS-F101.
Thib peb-kev lees paub ntawm tog(piv txwv li, Lloyds, Bureau Veritas) yuav tsum tau siv rau kev siv subsea.
5. Kev txwv kev ua haujlwm & kev ua raws cai
Qhov kub thiab txias: -50 ° F txog 800 ° F (-45 ° txog 427 ° F).
Siab txwv: Tsawg dua lossis sib npaug li 7,250 psi (500 bar) rau Chav Kawm 22.
Cov qauv tseem ceeb:
ASME Section VIII Div. 3(Alternative Pressure Vessels).
TS EN ISO 3183: 2019(Kev siv yeeb nkab).
