< HAZARDOUS INFORMATION < Temperature class
 

The maximum surface temperature of the exposed surface of electrical apparatus must always be lower than the ignition temperature of the gas or vapor mixture

Temperature class Maximum surface temperature Ignition temperature of combustible material

T1

450℃ >450℃

T2

300℃ >300℃

T3

200℃ >200℃
T4 135℃ >135℃
T5 100℃ >100℃
T6 85℃ >85℃

 

Medium Ignition temperature ℃ Temperature class Explosion group

Acetaldehyde

140       T4     IIA    

Acetic acid

485 T1           IIA    

Acetic anhydride

330   T2         IIA    
Acetone 540 T1           IIA    
Acetylene 305   T2             IIC
Ammonia 630 T1           IIA    
Amylacetate 380   T2         IIA    
Benzene 220     T3       IIA    
Benzol 555 T1           IIA    
Carbon disulphide 95           T6     IIC
Carbon monoxide 605 T1           IIA    
Cyclohexene 430   T2         IIA    
1,2 - Dichloretane 440   T2         IIA    
Diesel fuel 220 up to 300     T3       IIA    
Ethane 515 T1           IIA    
Ethylacetate 460 T1           IIA    
Ethyalcohol 425   T2         IIA IIB  
Ethychloride 510 T1           IIA    
Ethylene 425   T2           IIB  
Ethylenoxide 440   T2           IIB  
Ethyl ether 180       T4       IIB  
Ethyl glycol 235     T3            
Fuel oil 220 up to 300     T3       IIA    
Hydrogen 560 T1               IIC
Hydrogen disulfide 270     T3         IIB  
Methane 595 (650) T1           IIA    
Methanol 455 T1           IIA    
Methyl chloride 625 T1           IIA    
n - Butane 365   T2         IIA    
n - Buthylalcohol 340   T2         IIA    
n - Hexane 240     T3       IIA    
n - Propylalcohol 405   T2              
Naphtalene 520 T1           IIA    
Oleic acid 360   T2              
Phenol 595 T1           IIA    
Propane 480 T1           IIA    
Tetraline 425   T2              
Toluole 535 T1           IIA