1. ASTM A671 CB70 Chav Kawm 21 yog dab tsi?
TxujQauv: ASTM A671ultra-siab- siab cryogenicEFW kav dej rautseem ceeb zog thiab kev siv tshuab.
Ntsiab Specifications:
70 ksi (483 MPa) yield zog tsawg kawg nkausntawm-50 ° F (-45 ° F).
Tsim Siab: Mus txog6,000 psi (414 bar)(Qeb 21 ntsuam xyuas).
Khoom siv: Carbon -manganese steel nrogmicro{0}}alloying (Nb/V/Ti)thiab xaiv tau nickel rau qhov tsis tshua muaj siab -kub toughness.
2. Cov ntawv thov
Roj & Roj:
Deepwater subsea pipelines (siab sab nraud siab thiab cryogenic tej yam kev mob).
Siab - siab kis tau tus mob (LNG terminals, offshore platforms).
Kev lag luam:
Hypercompressor systems hauv petrochemical nroj tsuag.
Cryogenic siab hlab ntsha nrog kev ruaj ntseg nruj.
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 25 ft-lb (34 J) ntawm-50℃F | ASTM A673 (Charpy V) |
| Hydrostatic Test | 4.0x tsim siab (ib Chav Kawm 21) | 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 vuam nrogyuav tsum PWHT + quench & temperingrau thaj tsam tseem ceeb.
Ua kom txias txiasrau zoo -grained microstructure.
Daim ntawv pov thawj:
Ua raws liASME B31.3, API 5L, thiabDNV-OS-F101.
Thib peb-kev lees paub(piv txwv li, Lloyd's, ABS) rau cov dej num hauv dej hiav txwv.
5. Kev txwv kev ua haujlwm & kev ua raws cai
Qhov kub thiab txias: -50℃F txog 750℃F (-45℃rau 399 degree).
Siab txwv: Tsawg dua lossis sib npaug li 6,000 psi (414 bar) rau Chav Kawm 21.
Cov qauv tseem ceeb:
ASME Section VIII Div. 2(Cov hlab ntsha siab).
ISO 13623 Kev Tswj Xyuas Kev Lag Luam(Peline systems).
