Radiant Heat Protection
Radiant heat is the transfer of heat in the form of electromagnetic radiation. Heat is produced when it hits
an
absorbent material (molecular vibration). The heat emitted from any heat source is called radiant heat.
Radiant heat released in the casting processes of iron-steel, aluminum and similar metals is an
indispensable risk
and it is necessary to take precautions.
The performance measurement of the clothes that will minimize the effects of radiant heat on the human body
is made
according to the EN 6942 standard, which is included in the ISO 11612 harmonized standard.
A fabric sample according to this standard is subjected to a radiant heat flow of 20-40 kW / m² ± 5%
according to
the test standard. The heat that passes through the sample is measured using a calorimeter in contact with
the
fabric sample. Radiation stops when the temperature rise reaches 24 ° C or after 5 minutes. The time
required to
ensure the temperature rise in seconds in seconds is measured. This is the time that the wearer will pass
before
starting to feel pain due to second-degree burns caused by an increase in temperature.
According to the test results, fabrics are classified from 1 to 4 as the lowest performance level 1 and the
highest
performance level 4. The environmental conditions should be taken into consideration when choosing the
protective
clothing to be provided to protect people working against high radiant heat from this risk.
Factors such as working distance to radiant heat source, risk of molten metal splash, working time, working
positions play an important role in product model and fabric selection.
Aluminized fabrics are mainly used to reflect radiant heat. Radiant heat reflection performance of the
fabric varies
depending on the structure of the main fabric to which the aluminum coating is applied and the method and
type of
application of the aluminum coating.
The highest performance belongs to Para-Aramid based and dual aluminum foil (Dual Mirror) aluminized
fabrics, while
reflecting radiant heat, also protects the worker against all risks of the environment by showing high
resistance
against molten metal splashes.