1. ASTM A671 CC60 Class 12 yog dab tsi?
Txhais: Hluav taws xob-fusion-welded (EFW) yeeb nkab tsim los raunruab nrab-siab thiab qis- kev pabcuam kub, dav siv nyob rau hauvindustrial thiab zog siv.
Ntsiab Specifications:
Yield zog: 60 ksi (414 MPa) ntawm-20 ° F (-29 ° C).
Kev ntsuas siab: 2,000 psi (138 bar)(Kub 12).
Khoom siv: Carbon steel nrogcuam tshuam - kuaj cov khoom, haum rau cov mob cryogenic.
2. Nws siv qhov twg?
Kev lag luam:
Cryogenic kua thauj(LNG, kua oxygen, nitrogen).
Refinery thiab chemical cog piping(tsis yog{0}}cov kua dej corrosive).
Zog:
Tsawg-rau- nruab nrab siab siab kis tau tus mob.
Cov khoom siv hluav taws xob thiab cov kav dej(tsawg-qhov kub thiab txias).
3. Cov Khoom Siv Khoom & Kev Ntsuas
| Khoom | Kev xav tau | Test Standard |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug li 60 ksi ntawm-20 ° F (-29 ° C) | ASTM A 370 Cov Lus Qhia Tshwj Xeeb |
| Charpy Impact | Ntau dua lossis sib npaug li 20 ft-lb (27 J) ntawm-50 ° F (-45 ° F) | ASTM A673 (Pawg 2 lossis siab dua) |
| Hydrostatic Test | 1.5x tsim siab (3,000 psi) | ASTM A671 Tshooj 12 |
| NDT | Radiographic los yog ultrasonic kuaj | ASTM E94 / E 213 |
4. Kev tsim khoom & ntawv pov thawj
Txheej txheem:
Submerged arc vuam (SAW)los yog cov txheej txheem EFW zoo sib xws.
Tom qab-weld heat treatment (PWHT)rau kev daws kev ntxhov siab (yeem).
Daim ntawv pov thawj:
Ua raws liASME B31.3, API 5L PSL1, thiabTS EN ISO 3183.
xaiv tauNWS MR0175rau kev pabcuam qaub.
5. Kev txwv kev ua haujlwm & kev ua raws cai
Qhov kub thiab txias: -50 ° F txog 650 ° F (-45 ° F txog 343 ° F).
Siab txwv: Tsawg dua lossis sib npaug li 2,000 psi (138 bar) rau Chav Kawm 12.
Cov qauv tseem ceeb:
TS EN ISO 3183(Peline tsheb thauj mus los).
ASME B31.3(Cov txheej txheem kav dej).
