ASTM A179 Seamless U-Bend Boiler Thaum tshav kub kub Exchanger Steel Tubes
Khoom siv
ASTM A179 yog ib qho kev qhia tshwj xeeb uas suav nrog qhov tsawg kawg nkaus-phab ntsa tuab, seamless txias-draw qis-carbon steel hlab rau tubular heat exchangers, condensers, thiab cov khoom siv hluav taws xob zoo sib xws. Cov raj no yog tsim los siv rau hauv cov ntawv siv hluav taws xob sib txawv uas cov raj tau raug rau qhov kub thiab txias.
Specification
ASTM A179 specification qhia txog cov kev cai hauv qab no rau seamless U-khoov boiler kub exchanger steel hlab:
- Qhov Loj: Cov raj yuav tsum tau muab rau hauv qhov ntau thiab tsawg ntawm 1/8 txog 3 ntiv tes [3.2 txog 76.2 hli] nyob rau sab nraud.
- Phab ntsa Thickness: Qhov tsawg kawg nkaus phab ntsa thickness ntawm cov hlab yuav tsum yog {{0}}.035 nti [0.89 mm].
- Ntev: Cov raj yuav tsum tau muab tso rau hauv qhov ntev ntev lossis qhov ntev ntawm qhov sib txawv ntawm 16 txog 22 ko taw [4.88 txog 6.7 meters].
Xaus: Cov hlab yuav tsum muaj qhov xaus los yog beveled xaus rau vuam.
Tshuaj muaj pes tsawg leeg
Cov tshuaj muaj pes tsawg leeg ntawm ASTM A179 steel hlab yuav tsum ua raws li cov cai hauv qab no:
| Element | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.06 - 0.18 |
| Manganese (Mn) | 0.27 - 0.63 |
| Phosphorus (P) | 0.035 (max) |
| Sulfur (S) | 0.035 (max) |
| Silicon (Si) | 0.25 (max) |
Mechanical Properties
Cov yam ntxwv ntawm ASTM A179 steel tubes tau teev tseg raws li hauv qab no:
| Khoom | Yam tsawg kawg nkaus |
|---|---|
| Tensile zog | 325 MPa [47 ksi] |
| Yield zog | 180 MPa [26 ksi] |
| Elongation | 35 feem pua (min) |
| Hardness (HRB) | 72 (max) |
Qib Steel
Cov qib steel siv hauv ASTM A179 seamless U-khoov boiler kub exchanger steel hlab yog Qib A.
Daim ntawv thov
ASTM A179 seamless U-khoov boiler kub exchanger steel hlab pom daim ntawv thov nyob rau hauv ntau yam lag luam uas yuav tsum tau npaum li cas hloov tshav kub. Qee cov ntawv thov siv xws li:
- Boiler tubes: Cov hlab no yog siv rau hauv boilers kom hloov cov cua sov los ntawm lub combustion chamber mus rau cov dej los yog chav circulating sab hauv.
- Thaum tshav kub kub exchangers: Cov hlab pab txhawb kev sib pauv ntawm cov cua sov ntawm ob lub kua, ua kom muaj zog hloov pauv.
- Condensers: A179 raj yog ua hauj lwm nyob rau hauv condensers los hloov chav rau hauv cov kua daim ntawv los ntawm rho tawm tshav kub.
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