ASTM A269 Stainless hlau tube tsum,tiv tauj pebkom tau txais kev tsocai dawb thiab qauv!
ASTM A 269 Cov khoom sivyog ib qho kev qhia tshwj xeeb rau seamless thiab welded austenitic stainless hlau tubing siv nyob rau hauv ntau yam kev siv, xws li tshav kub exchangers, siab - kub kev pab cuam, thiab dav siv corrosion kuj. Nws yog ib qho tseem ceeb kom nkag siab txog qhov ntau thiab tsawg thiab kam rau ua ntawmA269 austenitic stainless hlau rajkom paub meej tias lawv haum lub hom phiaj npaj. Cov raj yuav tsum tau ua los ntawm cov txheej txheem seamless lossis welded. Ntawm cov chaw tsim khoom xaiv, stainless hlau tubing tuaj yeem muab cov khoom kub tiav lossis txias tiav.
Permissible Variations in Dimensions
Permissible variations nyob rau sab nraud txoj kab uas hla muab rau hauvastm a269 kam rau uaLub rooj tsis txaus los muab ovality nyob rau hauv nyias - cov phab ntsa phab ntsa, raws li tau teev tseg nyob rau hauv lub Rooj. Nyob rau hauv xws li cov hlab, qhov siab tshaj plaws thiab yam tsawg kawg nkaus diameters ntawm ib qho kev hla yuav deviate los ntawm nominal txoj kab uas hla tsis ntau tshaj li ob zaug qhov kev tso cai variation nyob rau hauv sab nraud txoj kab uas hla muab rau hauv lub rooj; Txawm li cas los xij, qhov nruab nrab txoj kab uas hla ntawm ntu ntu yuav tsum tseem nyob hauv qhov kev tso cai hloov pauv.
Kev Ncaj Ncees Tolerance
ASTM A269 stainless hlau raj yuav tsum tsis pub ntau tshaj 1/8 nti ntawm qhov sib txawv rau txhua 5 feet ntawm qhov ntev. Txawm li cas los xij, cov hlab uas muaj txoj kab uas hla tsawg dua 1/2 nti tuaj yeem muaj txog 0.040 nti ntawm kev sib txawv rau txhua qhov ntev.
Phab ntsa Thickness kam rau ua
Phab ntsa thickness ntawmASTM A269 seamless steel rajNws txawv raws qhov loj thiab cov khoom siv qib. Qhov kam rau ua rau phab ntsa thickness nyob ntawm seb cov thickness ntsuas txoj kev siv. Piv txwv li, cov raj ntsuas los ntawm txoj kev ultrasonic muaj qhov ua siab ntev dua qhov ntsuas los ntawm Eddy- txoj kev tam sim no.
Sab nraud txoj kab uas hla
Sab nraud txoj kab uas hla ntawmASTM A269 welded steel yeeb nkabmuaj qhov kam rau ua ntawm +/- 0.005 ntiv tes rau qhov ntau thiab tsawg mus txog 1 nti, thiab +/- 0.015 ntiv tes rau qhov loj dua 1 nti. Kev kam rau siab rau phab ntsa thickness thiab txoj kab uas hla yog sib cuam tshuam, thiab yog tias ib qho dhau qhov txwv, lwm qhov yuav tsum tau kho kom haum raws li qhov xav tau tshwj xeeb.
Ntev Ntev
Qhov ntev ntawmASME SA269 tubes can vary based on the manufacturing process. The standard allows for a variation of +/- 1/8 inch or +/- 0.5% of the specific length, whichever is greater.
ASTM A269 Permissible Variations hauv Dimensions
| Pab pawg | Loj, Sab Nrauv Dia, hauv. | Permissible variations in Outside Diameter hauv. (mm) |
Permissible Variations nyob rau hauv Phab ntsa ThicknessA % |
Permissible Variations nyob rau hauv Txiav Length in. (mm)B | Nyias phab ntsa TubesC | |
| Tshaj | Hauv qab | |||||
| 1 | Txog li 1/2 | ±0.005 (0.13) | ±15 | 1/8 (3.2) | 0 | … |
| 2 | 1/2 txog 11/2, excl | ±0.005 (0.13) | ±10 | 1/8 (3.2) | 0 | tsawg dua 0.065 in. (1.65 mm) nominal |
| 3 | 11/2 to 31/2, excl | ±0.010 (0.25) | ±10 | 3/16 (4.8) | 0 | tsawg dua 0.095 in. (2.41 mm) nominal |
| 4 | 31/2 to 51/2, excl | ±0.015 (0.38) | ±10 | 3/16 (4.8) | 0 | tsawg dua 0.150 in. (3.81 mm) nominal |
| 5 | 51/2 to 8, ib | ±0.030 (0.76) | ±10 | 3/16 (4.8) | 0 | tsawg dua 0.150 in. (3.81 mm) nominal |
| 6 | 8-12, ib | ±0.040 (1.01) | ±10 | 3/16 (4.8) | 0 | tsawg dua 0.200 in. (5.08 mm) nominal |
| 7 | 12-14 : kuv | ±0.050 (1.26) | ±10 | 3/16 (4.8) | 0 | tsawg dua 0.220 in. (5.59 mm) nominal |
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A: Thaum cov raj raws li kev txiav txim yuav tsum tau phab ntsa thicknesses 3⁄4 nyob rau hauv. (19.0 mm) los yog tshaj, los yog ib tug sab hauv txoj kab uas hla 60% los yog tsawg dua ntawm sab nraud txoj kab uas hla, yuav tsum tau ib tug dav variation ntawm phab ntsa thickness. Ntawm qhov ntau thiab tsawg, qhov sib txawv ntawm phab ntsa thickness ntawm 12.5% tshaj lossis qis dua yuav raug tso cai.
B: Cov kev kam rau siab no siv rau kev txiav ntev mus txog thiab suav nrog 24 ft (7.3 m). Rau qhov ntev dua 24 ft (7.3 m), qhov siab tshaj qhov siab yuav tsum tau nce los ntawm 1⁄8 in. (3 mm) rau txhua 10 ft (3 m) los yog feem ntau tshaj 24 ft, lossis 1⁄2 in. (13 mm), qhov twg tsawg dua.
ASTM A269 vs ASTM A213: Nkag siab cov ntawv thovIb qho kev sib txawv - teeb meem tshwj xeeb thaum lub sij hawm yuav khoom yog xaiv ntawm ASTM A269 thiab ASTM A213. Thaum lawv cov tshuaj muaj pes tsawg leeg (feem ntau qib304/304Lthiab316/316L) yog sib tshooj heev, lawv cov hom phiaj sib txawv:
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