PN-EN ISO 9239-1
Laboratory
DETERMINATION
OF THE FLOORINGS BURNING BEHAVIOUR WITH
METHOD ACCORDING TO PN-EN ISO 9239-1
Principle
of the method.
The
test consists on surrendering the sample laid horizontally on
undercoat applied in practice to action of the outside thermal
stream, about the standardized disintegration densities along the
sample, and the flame initiating the burn. The flame is spreading
along the sample in direction in accordance with the decreasing heat
flux density, up to the moment of spontaneous going out.
Stand
for determination of the floorings burning behaviour with method
according to PN-EN
ISO 9239-1
A critical heat flux at extinguishment - CHF is a measured size which means smallest value of the heat flux of the sample surface of tested material, by which flame burn spontaneous going out.
Measurement principle of the critical heat flux
CHF -
is characteristic of a material resistance for action of setting fire
outside sources. CHF constitutes the ground for establishing the
class of reaction to fire of floorings.
Alongside
inspecting the reaction to fire of floorings testing smoking their
products of the thermal decomposition out and the burn are being
conducted. Smoke production during the test is recorded as light
transmission in the exhaust stack.
Test
specimen.
The test
specimens shall be representative of the flooring in its end use.
Cut 6
specimens with dimensions (1 050 ± 5) mm × (230 ± 5) mm, three in
one direction (e.g. production direction) and three in a direction
perpendicular to the first direction.
The
specimen shall be mounted on a substrate that simulates the actual
floor and shall simulate actual installation practice.
Applying
research methods:
- civil engineering (requirements according to PN-EN 13501 for European Classification System: A2fl, Bfl, Cfl, Dfl , Efl lub Ffl),
- railways (according to the R10 requirement of the norm PN-EN 45545-2).