PN-EN ISO 15025
Laboratory
TESTING
ON LIMITED FLAME SPREAD OF PROTECTIVE CLOSING WITH
A METHOD ACCORDING PN-EN ISO 15025
Principle
of the method. This
test consists of exposing samples, held in a vertical position, to a
flame and determining the speed of propagation of the flame over the
tested material.
Stand
for testing limited flame spread of protective closing
Tests
may need to be conducted to either surface exposure or edge exposure,
or both.
During the
tests, the following parameters shall be determined:
- duration of flame application;
- after-flame time;
- after-glow time;
- length of char;
- ignition of filter paper from drops;
- occurrence of surface flash and its propagation length;
Test
specimen.
The
specimens shall be as representative as possible of the material
provided and shall exclude selvages. At least 6 specimens shall be
cut, each measuring 200mm x 160mm, five in the direction of the
warp, five in the direction of the weft. Where the fabric has
differing surfaces on the two sides enough samples shall be cut for
both surfaces to be tested.
Applying
research methods - protective
closing