Raws li Explosion-Proof Requirements rau Zone 0, Zone 1, Zone 2

Rau Zone 1 daim ntawv thov, tawg-pov thawj hom xws li "d" flameproof, "ib" intrinsically safe, encapsulating Ma thiab Mb, pressurized Px thiab Py, yog 'o', xuab zeb puv 'q', thiab nce kev nyab xeeb 'e' muaj feem xyuam. Cov hom no tseem tuaj yeem ua haujlwm hauv Zone 2. Txawm li cas los, hom “n” cov khoom siv tshwj xeeb rau kev siv hauv Zone 2.

Cov cuab yeej tiv thaiv qib	Ga	Gb	Gc
Cov qib kev tiv thaiv rau cov cuab yeej raug sau raws li cov yam ntxwv sib txawv ntawm cov khoom siv hluav taws xob tawg, tawg plua plav ib puag ncig, thiab thee mine methane explosive ib puag ncig, nrog rau qhov muaj peev xwm ntawm cov khoom siv los ua qhov ignition.	Nyob rau hauv qhov chaw tawg rog, cov cuab yeej raug xaiv nrog a "siab" qib kev tiv thaiv, kom ntseeg tau tias nws tsis ua haujlwm li qhov hluav taws xob thaum lub sijhawm ua haujlwm tsis tu ncua, xav tias malfunctions, los yog tsis tshua muaj kev ua tsis tiav.	Nyob rau hauv qhov chaw tawg rog, cov cuab yeej raug muab rau a "siab" qib kev tiv thaiv, xyuas kom meej tias nws tsis ua hauj lwm raws li qhov hluav taws kub qhov chaw thaum lub sij hawm ua hauj lwm ib txwm los yog xav tias txhaum conditic ions.	Nyob rau hauv qhov chaw tawg rog, cov khoom siv feem ntau yog muab rau a "dav dav" kev tiv thaiv, tiv thaiv nws los ntawm kev ua haujlwm ua qhov hluav taws xob thaum lub sijhawm ua haujlwm tsis tu ncua. Tsis tas li ntawd, Cov kev tiv thaiv ntxiv tuaj yeem siv tau los txo qhov tsim cov khoom siv hluav taws xob zoo, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej ntawm kev cia siab thiab nquag tshwm sim (e.g. tsis ua hauj lwm hauv cov teeb pom kev zoo).
Zone	Zone 0	Zone 1	Zone 1

Hais txog cov pa phem, classifications IIA, IIB, thiab IIC qhia txog cov roj sib txawv: IIA sib raug rau propane, IIB to ethylene, thiab IIC rau hydrogen. Cov qauv zoo li Exd IIA, Exd IB, thiab Exd IIC yog qhov tsim nyog rau thaj chaw muaj roj 1 thiab 2. Hloov pauv, Ex nL IIC cov khoom raug txwv rau kev siv hauv Zone 2 nkaus xwb.