ʻOku vahevahe ʻa e ngaahi maama ʻo e tohi fakamoʻoni ki ha ngaahi tuʻunga kehekehe

ʻOku fakafaʻahinga ʻa e maama ʻo e fakamoʻoni fakaʻauha ki ha fakafaʻahinga ʻe tolu: IIA, IIB, mo e IIC.

Kalasi IIA

Suitable for places with gasoline-like substances, hange ko e ngaahi pausa. ʻOku kasa ʻa e kasa fakafofonga ki he faʻahinga ko ʻeni.

Kalasi IIB

Used in general factories where hazardous gases are present. Ethylene is the representative gas for this classification.

Class IIC

Designed for factories exposed to fakapaaki ʻo e ʻo e, acetylene, or carbon disulfide.