1. ASTM A671 CA55 Class 23 Pipe yog dab tsi?
A:Nws yog ibsab saum toj-tier hluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabrated rau- kev pabcuam siab (23,000 psi hydrostatic test)thiabcryogenic ib puag ncig(hauv qab-50 ° F / -45 ° C).
"CA55": Qhia txog kev tswj chemistry (C Tsawg dua lossis sib npaug ntawm 0.28%, Si / Mn sib npaug) nrog yuav tsum tau uaCharpy impact testntawm-50 ° F / -45 ° C.
Ntsiab nta:
Tag nrho -Volume radiographic/automated ultrasonic soj ntsuam
Ncej -weld normalization + tempering
Ua raws liASTM A671-2025 Cov Lus Qhia Tshwj Xeebrau EFW kev tsim kho.
Daim ntawv thov: Ultra- cov roj sib sib zog nqus dej risers, hydrogen compression systems, thiab chaw tso tawm cryogenic infrastructure.
2. Chav Kawm 23 Puas piv rau Chav Kawm 20-22 li cas?
A:
| Parameter | Chav Kawm 23 | Chav Kawm 22 | Chav Kawm 21 |
|---|---|---|---|
| Kuaj Siab | 23,000 psi | 22,000 psi | 21,000 psi |
| Phab ntsa Thickness | hnyav tshaj | Hnyav | Nruab nrab - hnyav |
| Tus nqi hwm | 15-20%dhau Class 22 | 10% ntawm chav kawm 21 | Lub hauv paus |
| Qhov zoo: Chav Kawm 23 muab4.5% siab dua muaj peev xwmdua li Chav Kawm 22, tseem ceeb rau cov phiaj xwm roj av pem hauv ntej. |
3. Cov qauv & ntawv pov thawj siv dab tsi?
A:
Thawj StandardASTM A671 (2025 Edition) + ASME B31.3 Tshooj IX.
Yuav tsum xeem:
Hydrostatic xeem: 23,000 psi rau ntau dua lossis sib npaug rau 12 vib nas this (vs . 10s rau cov chav kawm qis).
NDT: 100% RT + phased-array UT (PAUT) nrogAWS D1.1weld qauv.
Charpy Impact3 x:sam-50 ° F / -45 ° C(min 25J avg, 20J ib tus nqi).
Xaiv tau: SSC xeem ibNCEES TM0177rau kev pabcuam qaub.
4. Fabrication & Vuam Criticals
A:
Vuam:
Ob -SAWnrog Ca- kho cov xaim xaim (piv txwv li, EH14).
Weld kho Tsawg dua los yog sib npaug li 8% ntev, max 2 kho ib leeg.
Kev kho cua sov:
Normalize ntawm1650℃F (900 degree)+ temper rau1200 ° F (650 ° F).
Tolerances:
OD:±0.6%(tighter dua Class 22's ± 0.7%).
Phab ntsa:+10%/-3%(vs . +10%/-5% rau Chav Kawm 22).
5. Chav Kawm 23 nyob qhov twg?
A:
Roj & Roj:
>3000msubsea manifolds
10, 000+ psigas txhaj qhov dej
Zog:
Fusion reactor cryogenic ntim
Ua kua hydrogen thauj trailer
Aerospace:
Cryogenic roj kab rau reusable rockets
