UNE EN ISO 11612 Heat and Flame
Protective clothing Clothing to protect against heat and flame
The protective clothing which complies with this Standard is designed to protect these workers against a short flame contact and at least one type of heat (convective heat, radiant heat, contact heat, molten metal splashes).
This Standard also defines some minimum parameters that the fabrics have to comply with: Tear resistance, tear strength, burst strength and seam strength.
The minimum requirements for these parameters are:
| Requirements |
Standard |
Minimum value |
| Tensile strength (warp and weft) |
EN 13934-1 |
300 N |
| Tear strength (warp and weft) |
EN 13937-2 |
15 N |
| Burst strength (warp and weft) |
EN 13938-1 |
200 kPa |
| Seam strength (warp and weft) |
EN 13935-2 |
225 N |
ISO 17493 Heat resistance
According to Standard ISO 17493, the fabrics or hardware used in the garment shall not ignite or melt and shall not shrink more than 5% at a temperature of 180 ēC. Also when a fabric shall be worn next to the skin, the material shall not ignite or melt and shall not shrink more than 10% at a temperature of 260ēC.
UNE-EN ISO 15025 Limited flame spread
The material shall meet the following requirements after applying the flame to the surface of the material for 10 seconds: no holes shall be formed, no flaming or melting to the top or either side edge, no debris, the after flame and afterglow times should not exceed 2 seconds. There is two different test methods: when the flame is applied on the surface of the fabric, the result is defined with a code A1 and when the flame is applied in vertical position (on the edge of the fabric) the code is A2.
ISO 9151 Convective heat
A test sample is exposed to a heat flux of 80 Kw/m2. This heat that flows through a sample is measured with a calorimeter in direct contact with the sample. The calorimeter measures in seconds the time that is needed to reach temperature rise
of 24ēC +/- 0,2ēC. The result is defined with the code letter B plus a digit showing the protection level.
| Nivells de prestació |
Interval de valors (s) |
| mínim |
màxim |
| B1 |
≥ 4,0 |
< 10,0 |
| B2 |
≥ 10,0 |
< 20,0 |
| B3 |
> 20,0 |
|
EN ISO 6942 Radiant heat
A radiant flash of heat with a flux density of 20 Km/m2 is applied on the sample. This test evaluates the time needed for a person to start feeling pain and on the other hand, the time needed to produce second degree skin burn injury.
The result is defined with the letter C plus a digit showing the protection level.
| Nivells de prestació |
Temps mitjā (s) |
| mínim |
màxim |
| C1 |
≥ 7,0 |
< 20,0 |
| C2 |
≥ 20,0 |
< 50,0 |
| C3 |
≥ 50,0 |
< 95,0 |
| C4 |
> 95,0 |
|
ISO 9185 Molten aluminium splash
Different quantities of molten aluminium are poured over a sample that has been placed on a support at a specific angle. The test evaluates the damage made to the fabric and in the PVC film placed behind the fabric to simulate the human skin.
The result is defined with the letter D plus a digit showing the protection level.
| Test Conditions |
| Aluminium temperature (ēC) |
780 ± 20 |
| Angle of release (ē) |
60 ± 1 |
| Height (mm) |
225 ± 5 |
| Performance levels |
Molten aluminium splash (g) |
| minimum |
maximum |
| D1 |
≥ 100 |
< 200 |
| D2 |
≥ 200 |
< 350 |
| D3 |
≥ 351 |
|
ISO 9185 Molten iron splash
Different quantities of molten iron are poured over a sample that has been placed on a support at a specific angle. The test evaluates the damage made to the fabric and to the PVC film placed behind the fabric to simulate human skin.
In this case, the result is defined with the letter E plus a digit showing the protection level.
| Test Conditions |
| Iron temperature (ēC) |
1400 ± 20 |
| Angle of release (ē) |
75 ± 1 |
| Height (mm) |
225 ± 5 |
| Performance levels |
Molten iron splash (g) |
| minimum |
maximum |
| E1 |
≥ 60 |
< 120 |
| E2 |
≥ 120 |
< 200 |
| E3 |
≥ 200 |
|
ISO 12127 Contact heat
A hot metal cylinder at a temperature of 250ēC is placed on the textile sample. On the other side of the sample there is a calorimeter measuring a rise in temperature. The performance level is a time that is needed to reach a 10ēC temperature rise in the calorimeter.
| Performance levels |
Value intervals (s) |
| minimum |
maximum |
| F1 |
≥ 5,00 |
< 10,0 |
| F2 |
≥ 10,00 |
< 15,0 |
| F3 |
> 15,00 |
|
<< This pictogram applies for the garments which comply with this standard. |
Foundries
EN11612 Heat and Flame