EN 407:2004 HEAT PROTECTION GLOVES.
This European standard is used to calculate the levels against thermal and/or Fire Hazard. To attain these standard following tests are performed.
Burning Behavior Test (After Flame and Glow Time)
In this test the ignition time and how long the material glow or burns after it catches fire is measured. This also measures the time taken by material to extinguish after being vertically ignited using four performance levels. In case, after 15 seconds of ignition if the seam comes apart, the gloves fails the test.
|
Performance Level |
1 |
2 |
3 |
4 |
|
After Flame Time (Seconds) |
<20 |
<10 |
<3 |
<2 |
|
After Glow Time (Seconds) |
X |
<120 |
<25 |
<5 |
CONTACT HEAT
This test is performed for determination of Thermal protection against contact heat by placing the sample glove on a pre heated probe with a temperature increase between 100 to 500 degree Celsius to measure the rise of temperature inside the glove from the beginning time. The temperature is recorded for at least 15 seconds. The glove must withstand for increasing temperature of maximum 10 degree Celsius for an approval.
CONVECTIVE HEAT
Convective heat measures how long does it takes to increase the temperature inside the glove from the top of the cuff to the back of hand and palm when placed against heat.
RADIENT HEAT
This measures the average time permeation time taken by the back of the hand to transfer heat inside the gloves when exposed to a defined heat source. This test ensures that the glove material can resist the heat transfer for a designated time period.
SMALL MOLTEN METAL SPLASHES
This test is based on the number of droplets required to heat the gloves samples to a required level from the back to the palm of the gloves. This test is performed in a closed chamber by dropping the molten splashes of metal to increase the temperature of 40 degree Celsius inside the gloves and the lowest mean number of four tests is recorded.
LARGE SPLASHES OF MOLTEN METAL
This test determines the thermal resistance of sample against the large quantity of molten splashes by placing a PVC foil above the sample. The molten splashes are poured over the sample to check the quantity of splashes required to damage the simulated skin. If the splashes remain stuck, ignite or punctures the glove then the sample will score 0 and the test is considered fail.
|
Performance level |
1 |
2 |
3 |
4 |
||
|
A |
Burning Behavior |
After Fame Time (Seconds) |
<20 |
<10 |
<3 |
<2 |
|
After Glow Time (Seconds) |
X |
<120 |
<25 |
<5 |
||
|
B |
Contact Heat (Threshold Time) (Temp/ Seconds) |
100 |
250 |
350 |
500 |
|
|
>15 |
>15 |
>15 |
>15 |
|||
|
C |
Convective Heat (Heat Transfer Time in Seconds) |
>4 |
>7 |
>10 |
>18 |
|
|
D |
Radiant Heat (Transfer Time) (Seconds) |
>7 |
>20 |
>50 |
>95 |
|
|
E |
Small drops of molten metal (no. of Drops) |
>10 |
>15 |
>25 |
>35 |
|
|
F |
Larger drops of molten Metal (Grams) |
30 |
60 |
120 |
200 |
|