1. ASTM A671 CA55 Class 30 Steel Pipe yog dab tsi?
A:Nws yog tussiab tshaj -qib hluav taws xob- fusion-welded (EFW) carbon steel yeeb nkabhauv ASTM A671 series, tsim rauultra-siab-siab (30,000 psi hydrostatic test)thiabkev pabcuam cryogenic(hauv qab-50 ° F / -45 ° C).
"CA55": Qhia meej txog kev tswj cov tshuaj nruj (C Tsawg dua lossis sib npaug ntawm 0.25%, Si / Mn optimized) nrog yuav tsum tau uaCharpy V-kev ntsuas ntsuasntawm-50 ° F / -45 ° C(min 30J avg zog).
Ntsiab nta:
Puv -ntevPhased{0}}array kuaj ultrasonic (PAUT)+ Kev tshuaj xyuas hluav taws xob.
Normalizing + temperingKev kho cua sov rau kev txhim kho toughness.
Ua raws liASTM A671-2025 Cov Lus Qhia Tshwj XeebthiabASME B31.3rau txheej txheem kav.
Kev siv yam: Offshore hyperbaric systems, hydrogen compression hubs, thiab nuclear fusion containers nkoj.
2. Chav Kawm 30 Muab piv rau cov chav kawm qis li cas (xws li Chav Kawm 22/23)?
A:
| Parameter | Chav Kawm 30 | Chav Kawm 23 | Chav Kawm 22 |
|---|---|---|---|
| Kuaj Siab | 30,000 psi | 23,000 psi | 22,000 psi |
| Phab ntsa Thickness | Qhov siab tshaj plaws | Hnyav | Hnyav |
| Nqi | 25-30% hwmdhau Class 23 | 15-20% ntawm Chav Kawm 22 | Lub hauv paus |
| Qhov tseem ceeb Advantage: Chav Kawm 30 muab30% siab dua muaj peev xwmtshaj hoob 23, tseem ceeb rauheev-dab dej hiav txwvthiabchaw tso tawm cryogenic systems. |
3. Cov qauv thiab ntawv pov thawj siv dab tsi?
A:
Thawj Cov Qauv:
ASTM A671 (2025 Tsab) rau EFW kav.
ASME B31.3 Tshooj IX (High-Pressure Piping).
Yuav tsum xeem:
Hydrostatic xeem: 30,000 psi rauNtau dua lossis sib npaug li 15 vib nas this(ntev tshaj plaws hauv koob).
NDT: 100% PUAS +digital radiography (DR).
Charpy Impact6 x:sam-50 ° F / -45 ° C(min 30J avg, 25J ib tus nqi).
Xaiv tau: HIC/SSC xeem ibNACE TM 0284-2025rau kev pabcuam qaub.
4. Fabrication & Welding tseem ceeb yuav tsum tau
A:
Vuam txheej txheem:
Ob npaug -SAW nrog tandem taub hau + laser hybrid vuamrau root pass.
Filler hlau:EH14-K2(Ca-kho rau qis-kub toughness).
Kev kho cua sov:
Normalize ntawm1700℃F (925 degree)+ temper rau1250 ° F (675 ° F).
Txias tus nqiTsawg dua lossis sib npaug li 75℃F / teev (42℃/ teev)tiv thaiv embrittlement.
Dimensional Tolerances:
OD:±0.5%( nruj tshaj plaws hauv koob).
Phab ntsa:+8%/-2%(vs . +10%/-3% rau Chav Kawm 23).
5. Chav Kawm 30 Exclusively Deployed nyob qhov twg?
A:
Roj & Roj:
>5000msubsea Christmas ntoo.
15, 000+ psigas reinjection systems.
Zog:
ITER fusion reactor cryogenic voj voog.
Ua kua hydrogen10,000 psi cia tank.
Aerospace:
Mars lub hom phiaj cryogenic roj depots.
