ASTM A179 Seamless Thaum tshav kub kub Exchanger Tube

ASTM A179 Seamless Heat Exchanger Tube piav qhia

ASTM A179 yog tus qauv tsim los ntawm American Society for Testing and Materials (ASTM), officially title "Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes." Hauv qab no yog cov ntsiab lus ntawm nws cov ntsiab lus tseem ceeb:

1. Scope ntawm daim ntawv thov:

- Muaj feem xyuam rau seamless txias-tso qis- cov pa roj carbon steel raj nrog qhov tsawg kawg nkaus phab ntsa thicknesses siv nyob rau hauv kev tsim cov cua kub exchangers, condensers, thiab zoo xws li cov khoom hloov mus rau tshav kub.

- Sab nraud diameters li ntawm 1/8 nti mus rau 3 nti (3.2 txog 76.2 mm). Txawm li cas los xij, cov raj uas muaj cov kab uas hla sab nraud thiab phab ntsa tuab me dua li qhov no kuj tseem siv tau. Rau cov raj uas muaj lub cheeb sab nraud tsawg dua 1/8 nti (3.2 hli) lossis phab ntsa thickness tsawg dua 0.015 nti (0.4 hli), cov khoom siv cuab yeej cuab tam yuav tsis siv.

2. Tshuaj muaj pes tsawg leeg:

- Cov tshuaj muaj pes tsawg leeg ntawm cov hlau yog raws li qhov yuav tsum tau muaj: carbon cov ntsiab lus ntawm 0.06% thiab 0.18%, manganese cov ntsiab lus ntawm 0.27% thiab 0.63%, siab tshaj plaws phosphorus ntsiab lus ntawm 0.035%, thiab siab tshaj plaws sulfur ntsiab lus ntawm 0.035%. Alloy steel tsis raug rau cov kev txwv no vim yog lwm cov kev cai hais txog cov ntsiab lus ntawm cov ntsiab lus tshwj xeeb.

3. Cov txheej txheem tsim khoom:

- Cov yeeb nkab steel yuav tsum yog seamless thiab txias- kos. Tom qab kos duab txias kawg, nws yuav tsum tau kho cua sov ntawm 1200 degrees Fahrenheit (650 degrees Celsius) lossis siab dua.

4. Surface condition:

Cov yeeb nkab tiav yuav tsum tsis muaj tev; ib qho me me ntawm oxides tsis suav tias yog tev.

5. Mechanical Properties thiab Test Requirements:

- Hais txog qhov yuav tsum tau muaj hardness, hardness coefficient ntawm steel yeeb nkab yuav tsum tsis pub tshaj 72 HRB.

- Kev ntsuam xyuas cov cuab yeej cuab tam muaj xws li kev ntsuam xyuas flattening, flaring tests, bending tests (nyob rau hauv tej yam kev mob, hloov qhov flaring test), hardness tests, thiab hydrostatic tests. Piv txwv li, qhov kev ntsuam xyuas flattening yuav tsum tau noj ib qho qauv ntawm txhua ob lub kav hlau hauv txhua pawg; qhov ntsuas dej siab yuav tsum tau kuaj txhua cov yeeb nkab steel, lossis nws tuaj yeem hloov tau los ntawm kev ntsuas hluav taws xob uas tsis yog - puas tsuaj yog tias thov los ntawm tus neeg yuav khoom.

Kev kuaj thiab tshuaj xyuas

Ntim thiab shipping