Basic Differentiation of Xov Materials
Cov threaded feem ntawm PPR yeeb nkab fittings feem ntau yog ua los ntawm stainless hlau, nrog 304 thiab 201 yog ob qho kev xaiv . 304 stainless hlau muaj 18% chromium thiab 8% npib tsib xee, muab kev tiv thaiv corrosion zoo dua; 201 stainless hlau muaj 16% chromium thiab 3.5% npib tsib xee, ua rau tus nqi qis tab sis tsis muaj zog xeb me ntsis. Hauv kev siv tswv yim, 304 raug pom zoo rau qhov chaw ntub dej.
Kev sib piv ntawm Daim Ntawv Thov Scenario
Kev cuam tshuam dej zoo: Hauv thaj chaw dej nyuaj, 304 raug pom zoo vim tias nws cov tshuaj tiv thaiv chloride ion corrosion yog 3 npaug zog dua 201.
Kev txiav txim siab txog nyiaj txiag: 201 cov khoom raug nqi kwv yees li 40% tsawg dua 304, ua rau nws haum rau luv luv - lub sijhawm qhuav ib puag ncig.
Lub voj voog tu: 304 threads tuaj yeem nyob xeb -dawb rau ntau tshaj 5 xyoos sab nraum zoov, thaum 201 kav li ntawm 2-3 xyoos.
Cov lus pom zoo yuav khoom
Kev soj ntsuam cov xov txheej kho tuaj yeem txiav txim siab sai sai: 304 feem ntau muaj cov nyiaj matte -dawb tiav, thaum 201 yog greyish dua -glossy. Nws raug nquahu kom xaiv raws li cov av noo ntawm ib puag ncig, pH ntawm cov dej, thiab lub neej kev pab cuam lub neej yuav tsum tau muab qhov tseem ceeb hauv cov chaw ntub dej xws li chav ua noj thiab chav dej.
