ASTM D6413 Vertical Flammability Tester for determining the
extend of propagation of flame
Product introduction
Flammability of fabrics may be determined by igniting one end of
fabric under test by mean of a suitable burner having a specified
flame intensity and determining the extend of propagation of flame
and the time taken by the flame to propagate between two marked
levels. In the vertical strip flammability tester, a test specimen
cut from the fabric under test is suspended vertically inside an
enclosure and the flame from a Bunsen burner is applied at its
bottom edge. The time taken by the flame to propagate between two
specified marks is then determined from which the numerical rating
of flame resistance property found. This method is suitable for all
fabrics which are in form of sheets or can be converted by cutting
into sheets.
Flammability Tester for fabrics consists of a vertical sheet metal
cabinet closed on three sides and top and bottom. The front side is
kept open for insertion of the test specimen. The test specimen is
suspended from a clip such that it hangs freely in the center of
the cabinet. Two marker wires are fixed behind the fabric under
test such that they are located 28 cm and 155 cm below the clip. A
removable auxiliary clip is also provided to enable shorter
specimens of flame resistant fabrics to be tested.
A bunsen burner of 9.5 mm diameter opening is placed in the lower
half of the cabinet and can be moved on two guide rods to enable it
to be brought vertically below the free end of the test specimen. A
flexible pipe line with a needle valve is provided to control the
flame height.
Specifications
| Size of Test Specimen | 183 cm x 4 cm |
| Size of modified test specimen | 40 cm x 4 cm |
| Distance of upper marker wire from the main clip | 28 cm |
| Distance of lower marker wire from the main clip | 155 cm |
| Distance of lower marker wire from the auxiliary clip | 10 cm |
| Diameter of burner opening | 9.5 mm |
| Dimensions of the Cabinet | 35 cm x 40 cm x 205 cm |
