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FLAME
PROTECTION TEXTS
IEC 61482-2:2009
Certified and approved garments appropriate for use in work
environments where there is a risk of electric arcs.
When there is a risk of being exposed to an electric arc, for
example, when servicing equipment in non-arc-safe distribution
plants or electrical switchboards, or when working on high voltage
equipment, personnel are recommended to wear arc-approved
protective clothing.
What protection does your clothing need to provide during an
arc blast?
The plasma clouds, flames, radiation and metal splashes
from the electrodes hit the fabric during an arc blast. When
this occurs, the fabric has to provide sufficient insulation to
prevent second-degree skin burns. An effective fabric used in
an arc garment must provide shielding against the flame and
metal splashes, as well as insulation from the intense heat. The
standard IEC 61482-2 includes two test methods, EN 61482-1-1
(open arc) and EN 61482-1-2 (box test). Our garments are certified
according to both test methods or one of them.
The garments must cover the whole body. For example, a
jacket and trousers must be worn together with other personal
protective equipment (PPE), including a helmet with protective
visor, protective gloves and protective footwear (boots) to achieve
the correct level of protection. Layering is very important and
will increase protection – if you wear flame retardent underwear
underneath your flame retardent garments you are protected for
even better.
ARC TEST IEC/EN 61482-1-1:2009 –
“OPEN ARC TEST”
EN 61482-1-1: Protective clothing against the thermal hazards of
an electric arc. Part 1-1 – Method 1: Determination of the arc
rating (ATPV or EBT50) of flame resistant material or clothing.
ATPV and EBT are both evaluated in the same test, an open arc test
(EN 61482-1-1/ASTM F1959). If the material has more thermal
insulation value than arc tensile strength in resistance to heat, then
it will break open first. If the opposite is true, the material will allow of the clothing will degrade. Examine the garments regularly to
burns before it breaks open. The lowest value is the one that is used
in the marking of the garments. Neither is better than the other. In
essence, EBT fabrics are typically more insulating than they are
strong and ATPV materials are stronger than they are insulating. You
should never make a clothing protection decision based on the fact
that clothing has achieved an ATPV or EBT rating. They are regarded
as functional equivalents.
Arc Thermal Performance Value (ATPV) is the incident energy on a
material that results in a 50 % probability that sufficient heat
transfer through the specimen is predicted to cause the onset of
second-degree burn injury based on the Stoll Curve. The higher the
value, the better the protection.
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Energy Break open Threshold: (EBT) is the incident energy on a
material that results in a 50 % probability of break open. Break
open is defined as any open area at least 1.6 cm². The higher the
value, the better the protection.
Both ATPV and EBT can be tested on single or multiple layers of
material. When you test multiple layers, you will achieve a higher
value then if the fabrics were tested separately because air trapped
between the fabrics also has an insulating and protective effect.
Heat Attenuation Factor (HAF) is the measurement of the
percentage of energy that is blocked by the material or material
system.
ARC TEST IEC/EN 61482-1-2:2014 - “BOX TEST”
EN 61482-1-2: Protective clothing against the thermal hazards of
an electric arc. Part 1-2 – Method 2: Determination of arc
protection class of material and clothing by using a constrained
and directed arc.
The garments are tested and evaluated in two classes in the same
test; a box test. (Voltage: 400 V, Duration: 500 ms, Frequency: 50Hz
or 60Hz).
Class 1 = 4 kA (arc energy 168 kJ)
Class 2 = 7 kA (arc energy 320 kJ)
The result is approved or not approved and in the test reports
the design is also commented on i.e. that the zip still works
after exposure.
EN ISO 11611:2015
Protective clothing for use in welding and allied processes.
This standard specifies two classes with specific performance
requirements; Class 1 being the lower level and Class 2 the
higher level.
Please see the table on page 35 to choose the right class for your
welding technique. In electric arc-welding operations there is a risk
of exposure of skin to Ultraviolet (UV) radiation. During use the fabric
prevent exposure to UV radiation. If user experience sunburn-like
symptoms, UVB is penetrating. If garment is found to be penetrated
by UV radiation, it should be repaired (if practicable) or replaced and
the use of additional, more resistant protective layers should be
considered in future.Two-piece protective clothing must be worn
together to provide the specified level of protection.The CE-label
inside the garment states the required garment-assembly. Using
additional partial protective garments, the basic garment shall meet
at least Class 1. Use of welding apron which covers the front body at
least from side seam to side seam is recommended. Additional
partial body protection may be required, e.g. for welding overhead.