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                IIA:丙酮/Acetone,乙烷/Ethane,苯/Benzene,石油/Petrol,丁烷/Butane,丙烷/Propane,甲烷/Methane;

                IIB:乙烯/Ethylene, 煤氣/Town gas;

                IIC:氫/Hydrogen,乙炔/Acetylene
                溫度組別:
                最高表面溫度
                450°C
                300°C
                280°C
                260°C
                230°C
                215°C
                200°C
                180°C
                165°C
                160°C
                135°C
                120°C
                100°C
                85°C
                溫度組別
                IEC
                T1
                T2
                 
                 
                 
                 
                T3
                 
                 
                 
                T4
                 
                T5
                T6
                NEC(USA)
                T1
                T2
                T2A
                T2B
                T2C
                T2D
                T3
                T3A
                T3B
                T3C
                T4
                T4A