ASTM A671 yog ib qho kev qhia tshwj xeeb uas qhia txog cov qauv rau hluav taws xob-fusion-welded steel yeeb nkab rau atmospheric thiab qis dua. Cov kav dej no feem ntau siv rau hauv ntau yam kev lag luam, tshwj xeeb tshaj yog nyob rau hauv cov kev pab cuam uas tsis tshua muaj kub thiab nruab nrab-kub qhov chaw uas muaj kev kub ntxhov thiab corrosive ib puag ncig muaj kev txhawj xeeb.
Ib qho tseem ceeb ntawm ASTM A671 kav yog lawv txoj kev tsim kho. Cov kav dej no yog tsim los ntawm hluav taws xob-fusion vuam, uas cuam tshuam cov npoo ntawm cov hlau los yog cov coils thiab sib txuas ua ke hauv qab hluav taws xob arc. Cov txheej txheem no ua kom muaj kev ruaj khov thiab ruaj khov, ua rau ASTM A671 cov kav dej tsim nyog rau cov ntawv thov uas yuav tsum tau muaj kev ruaj ntseg thiab cov kav dej xau.
Cov kav dej no muaj nyob hauv ntau qib thiab cov chav kawm, txhua tus tsim los ua kom tau raws li qhov xav tau ntawm qhov kub thiab txias. Lawv tuaj nyob rau hauv ntau qhov ntau thiab tsawg thiab phab ntsa thicknesses kom haum rau ntau yam kev siv, los ntawm kev thauj dej, roj, thiab roj mus rau cov hom phiaj hauv kev tsim kho.
Tsis tas li ntawd, ASTM A671 cov kav dej tau paub txog lawv cov kev tiv thaiv zoo heev rau corrosion, ua rau lawv tsim nyog siv rau hauv qhov chaw hnyav. Lawv tau siv dav hauv kev lag luam xws li petrochemical, tshuaj ua haujlwm, tsim hluav taws xob, thiab kev kho dej.
Hauv cov ntsiab lus, ASTM A671 cov kav dej yog cov khoom siv tseem ceeb hauv ntau hom kev lag luam, paub txog lawv lub zog, ua haujlwm ntev, thiab tiv thaiv corrosion, ua rau lawv muaj kev ntseeg siab rau ntau yam kev xav tau ntawm cov kav dej.
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