Fashewar Shenhai-Hujja
Kayan aikin hana fashewa an kasasu kashi biyu na firamare:
Kayayyakin da aka kera musamman don amfani da su a ma'adinan kwal na karkashin kasa.
Kayayyakin da aka yi niyyar amfani da su a wuraren fashewar iskar gas ban da ma'adinan kwal na karkashin kasa.
A cikin kashi na biyu, An ƙara rarraba kayan aikin rigakafin fashewar Class II bisa nau'in muhallin gas da zai iya aiki a ciki, wato IIA, IIB, da IIC. Ƙimar IIC tana wakiltar mafi girman matakin aminci, yana nuna cewa kayan aikin IIC sun dace don amfani a cikin IIA, IIB, da kuma yanayin rukunin gas na IIC.
Rarraba Zazzabi:
T1 yana nuna matsakaicin tsayi zafin jiki zafin jiki na 450 ° C.
T2 yana nuna matsakaicin zafin jiki na 300 ° C.
T3 yana wakiltar matsakaicin zafin jiki na 200 ° C.
T4 yana nufin matsakaicin zafin jiki na 135 ° C.
T5 yana nuna matsakaicin zafin jiki na 100 ° C.
T6, mafi girman aminci rating, yana nuna matsakaicin zafin jiki na 85°C.
Wannan tsarin rarrabawa yana tabbatar da cewa kayan aikin da ake amfani da su a cikin mahalli masu haɗari sun cika ka'idodin aminci da suka dace don takamaiman yanayin da ake ciki..