Resistance to flammability
The gloveâ€™s material is stretched and lit with a gas flame. The flame is held against the material for 15 seconds. After the gas flame is distinguished, the length of time is measured for how long the material either glows or burns.
Resistance to contact heat
The gloveâ€™s material is exposed to temperatures between +100Â°C and +500Â°C. The length of time is then measured for how long it takes the material on the inside of the glove to increase by 10Â°C from the starting temperature (approx. 25Â°C). 15 seconds is the minimum accepted length of time for approval. For example: to be marked with class 2, the gloveâ€™s inside material must manage 250Â°C heat for 15 seconds before the material exceeds 35Â°C.
Resistance to convective heat
The amount of time is measured for the heat from a gas flame (80Kw/kvm) to increase the temperature of the gloveâ€™s inside material by 24Â°C.
Resistance to radiant heat
The gloveâ€™s material is stretched in front of a heat source with an effect of 20-40 kw/kvm. The average time is measured for heat penetration of 2.5 kw/kvm.
Resistance to small splashes of molten metal
The test is based on the total number of drops of molten metal required to increase the temperature by 40Â°C between the inside of the glove and the skin.
Resistance to large splashes of molten metal
Simulated skin is attached to the inside of the glove material. Molten metal is then poured over the glove material. The total number of grams is measured of how much molten metal is required to damage the simulated skin.
|Test||Results measured in:||Results|
|1||After-burn time||Seconds||â‰¤ 20||â‰¤ 10||â‰¤ 3||â‰¤ 2|
|1||After-burn time||Seconds||infinity||â‰¤ 120||â‰¤ 25||â‰¤ 5|
|2||Contact heat||Temp in Â°C after 15 seconds||100Â°||250Â°||350Â°||500Â°|
|3||Convective heat||Seconds||â‰¤ 4||â‰¤ 7||â‰¤ 10||â‰¤18|
|4||Radiant heat||Seconds||â‰¤ 5||â‰¤ 30||â‰¤ 90||â‰¤ 150|
|5||Drops of molten metal||Number of drops||â‰¥ 5||â‰¥ 15||â‰¥ 25||â‰¥ 35|