Yam yuav tsum tau xav txog ua ntej siv lub tshuab ntsuas roj
I. Ntsuas qhov kev nyab xeeb ntawm cov nroj tsuag
Ua ntej nkag mus rau qhov chaw kaw thiab / lossis lub thawv ntim khoom, xyuas seb thaj chaw ua haujlwm puas muaj kev nyab xeeb thiab seb puas yuav tsum tau npaj, xws li cov khoom siv cua txias.
Puas muaj tej yam tshuaj lom lossis tawg hauv cheeb tsam, thiab yog tias muaj, lawv yog dab tsi? Qhov qib oxygen nyob ntawd yog dab tsi? Ob lo lus nug no tuaj yeem teb tau yog tias kev ntsuas kev nyab xeeb tuaj yeem ua tiav. Yog tias lub thawv tau ntim tag lawm, nws tseem ua lub luag haujlwm tseem ceeb hauv kev ntsuas kev pheej hmoo, tsis hais seb puas muaj cov pa paug tawm los yog nkag mus rau cov khoom phom sij.
Kev ntsuas kev nyab xeeb ntawm tsob nroj yuav tsum muaj kev txawj ntse hauv kev xaiv thiab siv txoj kev ntsuas txoj cai. Ntxiv dua thiab, cov txiaj ntsig tsuas tuaj yeem ntseeg tau los ntawm cov kws tshaj lij; Kev cob qhia kev nyab xeeb zoo thiab kev npaj tseem ceeb heev.
II. Cov teeb meem tseem ceeb hauv cov chaw txwv yog vim:
Tsim thiab tsim cov khoom tawg (kev ntsuas "flammable gas")
Oxygen deficiency lossis tshaj ("Oxygen" ntsuas)
Tsim thiab concentration ntawm cov tshuaj lom (kev ntsuas "toxic thiab txaus ntshai gases").
Kev ntsuas cov pa thiab oxygen yog qhov yuav tsum tau ua.
Cov pa oxygen concentration tsawg dua 19.0 vol % nyob rau hauv ib cheeb tsam txwv qhia tau hais tias muaj asphyxiation txaus ntshai.
Cov pa oxygen ntau dua 23.0 vol % qhia tias txhua yam khoom raug hluav taws kub thiab cov khoom muaj qhov kub thiab txias, suav nrog cov khaub ncaws tiv thaiv, uas tiv taus hluav taws nyob rau hauv ib txwm muaj xwm txheej.
