Teeb meem nrog Ordinary (Non-SML) Cast Iron Pipes in Building Drainage: The Xav Tau Kho

Thaum cov kav dej cam khwb cia hlau yuav tsum muaj lub neej ntev txog 100 xyoo, cov neeg nyob hauv ntau lab lub tsev nyob hauv thaj tsam xws li Southern Florida tau ua tsis tiav hauv tsawg li 25 xyoo. Yog vim li cas rau qhov no ceev degradation yog huab cua tej yam kev mob thiab ib puag ncig yam. Kev kho cov kav dej no tuaj yeem raug nqi kim heev, qee zaum nce mus txog kaum tawm txhiab daus las, nrog qee lub tuam txhab pov hwm tsis kam them cov nqi, ua rau ntau tus tswv tsev tsis npaj rau cov nuj nqis.

Vim li cas cov kav dej poob sai sai hauv cov tsev tsim nyob rau yav qab teb Florida piv rau lwm thaj tsam? Ib qho tseem ceeb tshaj plaws yog tias cov kav dej no tsis muaj coated thiab muaj cov ntxhib hauv sab hauv, ua rau cov ntaub ntawv fiber ntau xws li cov ntawv tso quav tso quav, uas ua rau muaj kev cuam tshuam rau lub sijhawm. Tsis tas li ntawd, kev siv cov tshuaj tua kab mob hnyav tuaj yeem ua kom lub zog ntawm cov kav hlau. Tsis tas li ntawd, qhov corrosive ntawm Florida cov dej thiab av ua rau cov yeeb nkab tsis ua haujlwm. Raws li tus kws kav dej Jack Ragan sau tseg, "Thaum cov pa roj av thiab dej corrode los ntawm sab hauv, sab nrauv kuj pib corrode," tsim "ob chav whammy" uas ua rau cov dej ntws mus rau hauv thaj chaw uas nws yuav tsum tsis txhob ua.

Hauv qhov sib piv, SML cam khwb cia hlau cov kav dej uas ua tau raws li EN877 cov qauv muab kev tiv thaiv zoo dua rau cov teeb meem no. Cov kav dej no muaj cov epoxy resin coatings rau ntawm phab ntsa sab hauv, muab ib tug du nto uas tiv thaiv scaling thiab corrosion. Cov phab ntsa sab nrauv yog kho nrog cov xim pleev xim, kom ntseeg tau zoo dua rau ib puag ncig noo noo thiab corrosive tej yam kev mob. Qhov kev sib xyaw ua ke ntawm cov txheej sab hauv thiab txheej txheej no muab SML cov kav dej ntev dua thiab muaj kev ntseeg siab dua hauv cov xwm txheej nyuaj, ua rau lawv muaj kev ruaj khov thiab muaj txiaj ntsig zoo rau kev tsim cov kav dej.