ISO 11612: 2015 Standard for Protective Clothing against Heat & Fire

ISO 11612 is a standard that tests six different types of resistances against fire and heat threats. Each parameter is associated with a letter and a level of resistance: A1 B1 C1 D1 E1 F1.

TEXT VERSIONVISUAL VERSION

A A1	FLAME PROPAGATION Sample is exposed to flame for 10 seconds Flame persistence measurement Residual incandescence Noticeable hole
B B1 B2 B3	CONVECTIVE HEAT Temperature elevation behind sample is timed + 24°C (t24)
C C1 C2 C3 C4	RADIANT HEAT Temperature elevation behind sample is timed + 24°C (t24)
D D1 D2 D3	MOLTEN ALUMINIUM SPLASHES Maximum quantity poured before damaging the PVC film Molten Aluminium at 780°C/1436°F PVC film simulates human skin
E E1 E2 E3	MOLTEN CAST-IRON SPLASHES Maximum quantity poured before damaging the PVC film Molten Iron at 1400°C/2552°F PVC film simulates human skin
F F1 F2 F3	CONTACT HEAT Heat transmission is measured 250°C/482°F Increased by 10°C