Dab tsi yog qhov txawv ntawm ASTM A249 thiab A213?
Dab tsi yog qhov txawv ntawm ASTM A249 thiab A213?ASTM A 249 Cov khoom sivyog tus qauv rau welded austenitic steel hlab rau boilers, superheaters, tshav kub exchangers thiab condensers.
CovASTM A 213yog tus qauv rau seamless ferritic thiab austenitic steel hlab rau boilers, superheaters thiab tshav kub exchangers.
ASTM A213 vs ASTM A249 Kub Exchanger Tubes: Cov txheej txheem tsim khoom
Cov caiASTM A 213tsom rau seamless raj, tsim los ntawm extrusion los yog txias kos duab, haum rau kev kub siab thiab kub kub. Ntawm qhov tod tes, lubASTM A 249 Cov khoom sivhais txog welded hlab, tsim los ntawm longitudinal welding thiab feem ntau txias ua hauj lwm, npaj rau kev siv dav dav nrog ntau dua uniformity ntawm phab ntsa thickness.
Qhov txawv ntawm ASTM A213 thiab ASTM A249 Yeeb Nkab
| Feature | ASTM A 213 | ASTM A 249 Cov khoom siv |
|---|---|---|
| Tube hom | Seamless (tsis muaj vuam) | Welded (ERW / Laser / TIG) |
| Kev siv tseem ceeb | Kev kub siab boilers, superheaters | Thaum tshav kub kub exchangers, condensers |
| Khoom siv | Austenitic thiab ferritic hlau (TP304, 316L, 310S, 347, thiab lwm yam) | Austenitic steel nkaus xwb (TP304, 316L, 321, thiab lwm yam) |
| phab ntsa thickness | Feem ntau thicker | thinner thiab heev uniform |
| Nto tiav | Kub los yog txias dov | Ua haujlwm txias thiab kho cua sov |
| Cov kev cai xeem | Flaring, flanging, hardness thiab hydrostatic xeem | Weld rhiab heev, crushing, rov qab khoov xeem |
Cov ntaub ntawv thiab qib
Ob qho qauv siv dav siv austenitic stainless hlau qib: TP304, TP304L, TP316, TP316L, TP347, TP347H, TP321, TP321H thiab 904L, nrog rau cov khoom tshwj xeeb rau ntau daim ntawv thov kev lag luam.
Dimensional Tolerance Sib piv: ASTM A213 vs ASTM A249
1. Sab nraud txoj kab uas hla (OD) kam rau ua
OD kam rau ua yog ib qho tseem ceeb los xyuas kom meej haum ntawm lub tubesheet.
| Sab nraud txoj kab uas hla (inch) | Sab nraud txoj kab uas hla (mm) | DE kam rau ua (inch) | OD kam rau ua (mm) |
|---|---|---|---|
| < 1.000 | < 25.4 | ± 0.004 | ± 0.10 |
| 1,000 – 1,500 | 25.4-38.1 Nws | ± 0.006 | ± 0.15 |
| >1,500 - 2,000 | >38.1–50.8 | ± 0.008 | ± 0.20 |
| 2,000 – < 2,500 | 50.8–63.5 | ± 0.010 | ± 0.25 |
| 2,500 – <3,000 | 63.5–76.2 | ± 0.012 | ± 0.30 |
Lus Cim: Cov kev zam no siv tau rau ob tus qauv raws li ASTM A1016 cov kev cai dav dav.
2. Phab ntsa thickness kam rau ua (EP)
Ntawm no yog ib qho tseem ceeb sib txawv: welded A249 raj muaj ntau dua uniformity dua seamless A213 raj.
| Txoj cai | Tube hom | Thickness kam rau ua | Technical vim li cas |
|---|---|---|---|
| ASTM A 213 | Seamless (txias tiav) | ± 10% lossis ± 12.5% (nyob ntawm qhov loj me) | Thaum drilling khoom ingot, nws yog ib qho nyuaj rau tswj concentricity. |
| ASTM A 213 | Seamless (kub tiav) | +40% / -0% (raws li DE / EP ratio) | Kub extrusion generates ntau variation. |
| ASTM A 249 Cov khoom siv | Welded (kub dov) | ± 10% | Los ntawm precision laminated daim kab xev, ntau dua concentricity. |
3. Txiav ntev ntev
Siv tau rau qhov ntev ntev (tsis yog qhov ntev ntev).
| Sab nraud txoj kab uas hla | Ntev (feet) | Zoo kam rau ua | Tsis zoo kam rau ua |
|---|---|---|---|
| Txhua qhov ntau thiab tsawg | < 24 ft | +1/8 nti (3 hli) | -0 |
| Txhua qhov ntau thiab tsawg | 24-34 ft | +1/4 nti (6 mm) | -0 |
| Txhua qhov ntau thiab tsawg | >34ft ua | +1/8 nti rau 10 ft | -0 |
Daim ntawv thov: ASTM A213 vs ASTM A249
ASTM A213 (seamless) thiab ASTM A249 (welded) yog cov qauv tseem ceeb rau austenitic stainless hlau raj npaj rau cov khoom siv hluav taws xob sib txawv, feem ntau sib txawv hauv txoj kev tsim khoom thiab kev faib tawm siab. Tus qauv A213 yog tsim los rau kev kub siab, kub kub thiab kev siv tseem ceeb, thaum A249 feem ntau siv rau cov kev pabcuam dav dav, condensers thiab cov ntawv thov uas tus nqi yog qhov txiav txim siab.
Qhov txawv ntawm ASTM A269 thiab A249?
ASTM A249 xav kom cov welds txias ua haujlwm tom qab vuam txheej txheem thiab ua ntej kev kho cua sov kawg. ASTM A269 tsis xav tau txhua yam kev ua haujlwm txias lossis tswj cov hlaws hlaws. ASTM A270 tus qauv tsis tas yuav muaj cov hlaws hlaws. ASTM A554 tuaj yeem muab tau nrog cov hlaws vuam tsis zoo; Yog li ntawd, nws ua tau raws li "Tshem tawm Bead" kev xaiv tau teev tseg hauv tus qauv A554.
ASTM A213 / A249 Kub Exchanger Tube Chaw tsim tshuaj paus
100% traceability:EN daim ntawv pov thawj xeem 10204 3.1.
Advanced non-destructive testing:Tag nrho cov raj dhau los ntawm eddy thiab hydrostatic tam sim no.
Ntiaj teb no logistics:Ntim rau hauv fumigation-free ntoo thawv rau kev tiv thaiv tag nrho.
Ua kom tiav specifications
| Feature | ASTM A213 (tsis muaj seamless) | ASTM A249 (Welded) |
|---|---|---|
| Cov txheej txheem tsim khoom | Txias kos los yog kub dov | Fusion vuam + ua haujlwm txias |
| Qib ib txwm | Austenitics: T11, T12, T22, T5, T91 | Austenitics nkaus xwb: TP304 / L, 316 / L, 321, 347, 317 / L |
| UNS Cov Qauv | S30400, S31603, S32100, K11597 (T11) | S30400, S31603, S32100, S31703 |
| Sab nraud txoj kab uas hla | 1/8 "- 5.00" (3.2-127mm) | 1/8 "- 5.00" (3.2-127mm) |
| phab ntsa thickness | 0.015 "- 0.500" (0.4-12.7 hli) | 0.015 "- 0.320" (0.4-8.1 hli) |
| Hom ntawv | Ncaj, U-puab, coiled, finned | Ncaj, U-puab, coiled |
| Txheem ntev | Mus txog 24 m | Mus txog 30 m |
