DIN 53438
Laboratory
IGNITABILITY TEST OF MATERIALS AND PRODUCTS WITH METHODS ACCORDING TO DIN 53438 PART 2 AND DIN 53438 PART 3.
Principle of the method.
The test are being conducted in the ventilating chamber. The sample, upright, is being subjected to the effect of the gas burner flame about the flame height of 20 mm.
Stand
for testing the ignitability of materials
The
flame
application time on
the sample - for 15 s. After this time are being moved away burner.
Tests
may need to be conducted to either surface exposure or edge exposure,
or both.
For
each of the test specimens, record the following:
- whether ignition occurs;
- duration of flaming,
- length of the proliferation of the flame,
- whether the flame tip reaches 150mm above the flame application point, and the time at which this occurs;
- presence of flaming droplets/particles which cause ignition of the filter paper;
- observations of physical behaviour of the test specimen.
Test
specimen.
For each
exposure condition, a minimum of six representative specimens of the
product shall be tested. Three specimens shall be cut lengthwise and
three crosswise.
Dimensions
of the test specimens.
for
surface exposure
- 190 mm long
- 90 mm wide
for
edge exposure
- 230 mm long
- 90 mm wide.
Specimens
normally having a thickness of 60mm or less shall be tested using
their full thickness. Specimens normally having a thickness greater
than 60mm shall be reduced to a thickness of 60mm by cutting away
the unexposed surface. If it is necessary to reduce the specimen size
in this manner, the cut surface shall not be exposed to the flame. For
materials which exhibit different characteristics along or across the
direction of manufacture (e.g. coated fabrics, textiles), one single
test shall be carried out along and another test across this
direction.
Applying
research methods - civil
engineering (requirements according to DIN
4102 part 1 for class
B2).