Nodular cam khwb cia hlau / ductile hlau (DI) yog ib yam ntawm cov khoom muaj zog cam khwb cia hlau tsim nyob rau hauv 1950s. Nws cov khoom siv dav dav yog ze rau cov hlau. Raws li nws cov khoom zoo heev, nodular cam khwb cia hlau tau ua tiav siv hauv casting qee qhov chaw nrog kev quab yuam, siab zog, toughness thiab hnav tsis kam. Nodular cam khwb cia hlau tau tsim sai heev rau hauv cov khoom siv cam khwb cia hlau, thib ob tsuas yog grey cam khwb cia hlau. Lub thiaj li hu ua "hlau es tsis txhob steel", feem ntau yog hais txog cov hlau ductile.
Nodular Cast Iron Flange kev sib txuas yog cov txheej txheem ntawm kev kho ob lub kav dej, fittings, lossis cov khoom siv rau ntawm lub phaj flange, nrog cov flange pads ntxiv ntawm ob lub flanges thiab bolted ua ke kom tiav kev sib txuas. Qee cov yeeb nkab fittings thiab cov khoom siv twb tuaj nrog lawv tus kheej flanges, uas kuj yog flange sib txuas. Cast Iron Flange yog ib txoj hauv kev txuas tseem ceeb hauv kev tsim cov kav dej. Cam khwb cia hlau Flange yog ib qho yooj yim mus use thiab muaj peev xwm tiv taus siab loj. Nyob rau hauv industrial pipelines, flange kev twb kev txuas yog dav siv.
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