1. ASTM A671 CJB115 Class 22 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CJB115 Chav Kawm 22 yog ib qhohluav taws xob-fusion-welded (EFW) carbon steel yeeb nkabtsim rausiab-siab thiab siab siab-kub siv kev lag luam(ua haujlwm saum toj no-20 ° F / -29 ° C). Lub npe "Class 22" qhia tias aYam tsawg kawg nkaus lub zog ntawm 22 ksi (152 MPa), muab tso rau ntawm tus qauv thiab tshwj xeeb siab -siab tshuab hauv CJB115 series.
2. Cov khoom tseem ceeb?
Teb:
Mechanical:
Yield zog:Ntau tshaj lossis sib npaug rau 22 ksi (152 MPa).
Tensile zog:80-100 ksi (552-690 MPa).
Impact Test: Yeem (yuav tsum tau yog tias tau teev tseg rau qis- siv kub).
Tshuaj muaj pes tsawg leeg:
Cov pa roj carbon (C):Tsawg dua lossis sib npaug li 0.35%Manganese (Mn):Tsawg dua lossis sib npaug li 1.35%, P/S: Tsawg dua lossis sib npaug li 0.035%.
3. Cov ntawv thov zoo li cas?
Teb:
Siab -siab cov kabhauv cov nroj tsuag muaj zog.
Txheej txheem kavrau cov roj refineries thiab chemical nroj tsuag.
Muaj boilers thiab tshav kub exchangersnrog nruab nrab thermal stress.
4. Nws Puas Piv rau Chav Kawm 21 thiab Chav Kawm 25?
Teb:
| Chav kawm | Yield zog | Key Siv Case |
|---|---|---|
| Chav Kawm 21 | 21 ksi (145 MPa) | High -siab tshuab |
| Chav Kawm 22 | 22 ksi (152 MPa) | Txhim kho siab -siab/thermal |
| Chav Kawm 25 | 25 ksi (172 MPa) | Tshwj xeeb siab -siab |
5. Fabrication & Quality Control?
Teb:
Vuam:Preheat (300-400℃F) xav tau rau thickness>1" (25.4 hli).
Kev sim:Hydrostatic (1.5x tsim siab) + yeem NDE (UT/RT).
Kev tsim:Kub dabtsi yog khoov pom zoo rau hnyav deformations.
Kev tshuaj xyuas:Ua raws li tag nrhoASTM A671-26 Cov khoom lag luamqauv.
