Anti-tawm square nyob ntsiag to EN124 A15 ductile hlau manhole npog

Tus txheej txheem tswj hwm yog EN124, uas teev ntau yam kev cai thiab kev sim rau manhole npog.Nyob rau hauv cov nqe lus ntawm kev tiv thaiv kev daws teeb meem, ductile hlau manhole npog feem ntau yog siv tshwj xeeb tsim, xws li ntxiv cov qauv kev txhawb nqa los yog siv cov txheej txheem los tiv thaiv cov kua dej, uas tuaj yeem tiv thaiv cov manhole npog los ntawm kev puas tsuaj los yog dislocation vim lub hauv paus kev daws teeb meem.Qhov kev tiv thaiv kev daws teeb meem no pab ua kom muaj kev nyab xeeb ntawm txoj kev thiab thaj chaw neeg taug kev, thiab txo cov xwm txheej thiab kev puas tsuaj los ntawm kev sib haum xeeb ntawm manhole npog.Nws raug pom zoo tias thaum xaiv thiab txhim kho nodular cam khwb cia hlau manhole npog, nws yog ib qho tsim nyog los xyuas kom meej tias lawv ua tau raws li qhov yuav tsum tau muaj ntawm chav kawm A15 thiab kev siv tus qauv EN124, thiab xaiv qhov tsim nyog los tiv thaiv kev daws teeb meem raws li qhov xwm txheej tiag tiag. xyuas kom ruaj ntseg thiab kev pab lub neej ntawm lub manhole npog.

Peb cov ductile hlau manhole npog yog tsim kom kav ntev.Nws cov khoom siv ruaj khov thiab cov khoom tiv thaiv corrosion ua rau nws tsim nyog siv rau ntau qhov chaw ib puag ncig, suav nrog thaj chaw muaj huab cua hnyav.Cov khoom siv hlau muaj zog ua kom peb cov npog yuav sawv qhov kev sim ntawm lub sijhawm thiab kev siv hnyav, txo qhov kev xav tau ntawm kev hloov ntau zaus.