1. ASTM A671 CC65 Class10 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CC65 Class10 yog ibhluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rauqis- kub thiab siab - kev siv siab. "CC65" qhia txog cov khoom siv qib (carbon steel nrog lub zog siab dua CA55), thaum "Class10" qhia tiasKev ntsuas siab ntawm 10,000 psintawm qhov kub thiab txias. Cov kav dej no tau siv dav hauvLNG chaw, fais fab nroj tsuag, thiab offshore platforms.
Ntsiab Lus:Class10 lub peev xwm siab dua ua rau nws tsim nyog rau kev xav tau ntau dua li Class62 (6,200 psi).
2. Dab tsi yog Kev Tsim Khoom thiab Kev Ntsuas Cov Cai?
Teb:
Vuam txheej txheem:EFW nrog muab tub lim hlau, ua raws li100% radiographic kuaj (RT)los yog kev kuaj ultrasonic (UT) kom ntseeg tau tias kev ruaj ntseg vuam.
Kev kho cua sov:Yuav tsum tauKev ntxhov siab los yog tom qab-weld heat treatment (PWHT)txhawm rau txhim kho cov khoom siv kho tshuab.
Qhov Loj:Feem ntau muaj nyob rau hauv16 "rau 120" OD, nrog phab ntsa thicknesses ib ASME B36.10M qauv.
Ntxiv:Tsis zoo li cov kav dej seamless, EFW cov kav dej yuav tsum muaj kev soj ntsuam nruj nruj vim muaj qhov tsis xws luag.
3. Qhov ntsuas kub thiab siab npaum li cas Class10 npog?
Teb:
Qhov kub thiab txias: -20 ° F txog 650 ° F (-29 ° F txog 343 ° F)(zoo ib yam li Class62, tab sis nrog siab siab kam rau siab).
Kev ntsuas siab: 10,000 psi(vs. Class62's 6,200 psi), zoo tagnrho rausiab -pas kis tau tus mob los yog cryogenic cia.
Lus Cim Tseem Ceeb:Kev ntsuam xyuas cuam tshuam (xws li Charpy V-notch) yog xav tau rau qhov kub thiab txias hauv qab -20℃F kom ntseeg tau tias kev puas tsuaj puas.
4. Cov khoom siv CC65 piv rau lwm cov qib ASTM A671 li cas?
Teb:
| Qib | Yield zog (ksi) | Qhov Tseem Ceeb |
|---|---|---|
| CA 55 | Ntau dua lossis sib npaug li 55 | Tus nqi qis dua, lub zog nruab nrab |
| CC65 ua | Ntau dua lossis sib npaug li 65 | Lub zog siab dua rau siab - kev pabcuam siab |
| cd70 ua | Ntau dua lossis sib npaug li 70 | Superior corrosion kuj |
Daim ntawv thov tswv yim:CC65 sib npaug tus nqi thiab kev ua haujlwm tab sis yuav xav tau cov txheej txheem xeb hauv qhov chaw hnyav.
5. Dab tsi yog Cov Txheej Txheem Kev Tshawb Fawb thiab Ntawv Pov Thawj?
Teb:
NDT:RT / UT rau welds; Kev kuaj hydrostatic (1.5x tsim siab) rau kev kuaj dej.
Ntawv pov thawj:Mill test reports (MTRs) yuav tsum muajTshuaj muaj pes tsawg leeg, txhua yam khoom, cov ntaub ntawv kho cua sov, thiab NDT cov txiaj ntsig.
Marking:Cov kav dej yog stamped nrogASTM A671, CC65, Class10, loj, thiab cov chaw tsim khoom lub npe.
Tshwj xeeb Case:Rau kev pabcuam qaub (H₂S), cov kev xeem ntxiv xws li kev tswj xyuas qhov tawv tawv ntawm NACE MR0175 tuaj yeem siv.
