1. A671/CG100 Class 22 Steel Pipe yog dab tsi?
Teb:
A671/CG100 Chav Kawm 22 yog ibhluav taws xob -fusion-welded (EFW) steel yeeb nkabtsim rauqis- kub thiab siab - kev pabcuam siab, ua raws li cov qauv ASTM A671. Lub "CG100" qhia tias nws yog tsim los ntawmcarbon hlau, thiab "Class 22" qhia nwskev ntsuas siab thiab ntsuas qhov xav tau(piv txwv li, kev sim hydrostatic ntawm 100% ntawm cov lus qhia tawm lub zog).
Cov yam ntxwv tseem ceeb:
Khoom siv:Cov pa roj carbon steel nrog tswj chemistry rau qis -kub toughness.
Vuam:Longitudinal seam welded ntawm hluav taws xob fusion.
Daim ntawv thov:Cryogenic cia, LNG pipelines, thiab kev lag luam roj.
2. Dab tsi yog qhov kub thiab txias txwv?
Teb:
Qhov kub thiab txias:Haum rau-50 ° F txog 650 ° F (-45 ° F txog 343 ° F). Chav kawm 22 cov kav dej feem ntau siv hauvsub-zero ib puag ncigvim muaj kev cuam tshuam -cov ntaub ntawv kuaj.
Kev ntsuas siab:Nws txawv ntawm txoj kab uas hla thiab phab ntsa tuab, tab sis Chav Kawm 22 feem ntau ua haujlwmnruab nrab mus rau siab(piv txwv li, 1,000–2,000 psi nyob ntawm tus qauv tsim).
Nco tseg:Cov kev txwv tseeb nyob ntawm cov yeeb nkab qhov ntev thiab ua raws li ASME B31.3 / B31.8 cov lej.
3. A671/CG100 Chav Kawm 22 Piv rau Lwm Chav Kawm li cas (xws li Chav Kawm 21 lossis Chav Kawm 52)?
Teb:
| Chav kawm | Kuaj Siab | Hom Siv Case |
|---|---|---|
| Chav Kawm 21 | 60% ntawm yield zog | Tsawg-siab, tsis yog-tseem ceeb systems |
| Chav Kawm 22 | 100% yield zog | Nruab nrab/siab-siab, qis-kub |
| Chav Kawm 52 | 100% + kev nyuaj siab-relieved | Cov xwm txheej hnyav (piv txwv li, offshore rigs) |
Qhov txawv tseem ceeb:Chav Kawm 22 muaj qhov sib npaug ntawm tus nqi thiab kev ua haujlwm rau cov ntawv thov cryogenic, thaum Chav Kawm 52 tau txais kev ntxhov siab ntxiv rau qhov chaw huab cua.
4. Cov qauv thiab ntawv pov thawj siv dab tsi?
Teb:
Primary Standard:ASTM A671 (EFW kav dej rau atmospheric / qis temps).
Complementary Standards:
ASTM A370 (Kev kuaj tshuab tshuab).
ASME Tshooj IX (cov txheej txheem vuam).
NACE MR0175 (yog siv hauv kev pabcuam qaub).
Cov ntawv pov thawj:Mill test reports (MTRs) rau cov tshuaj muaj pes tsawg leeg, kuaj hydrostatic, thiab Charpy cuam tshuam cov kev ntsuas ntawm qis temps.
5. Dab tsi yog qhov kev sib tw Fabrication thiab Installation?
Teb:
Vuam:Yuav tsum tau ua ntej/post-weld kho cua sov kom tsis txhob brittleness nyob rau hauv qis -temp zones.
Kev tuav:Kev cuam tshuam toughness yuav tsum tau khaws cia; zam kev khoov txias yam tsis muaj kev ntsuam xyuas.
Corrosion:Cov txheej txheem los yog kev tiv thaiv cathodic yuav xav tau rau cov kav dej faus.
Tswv yim Pro:Ua raws li ASTM A671 Appendix X3 rau kev taw qhia ntawm kev ntsuas vuam thiab tsis muaj kev puas tsuaj (NDT).
