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Flammability Tester
Resistance to propagation
of flame of materials used in the interiors of motor vehicles is
determined by finding the horizontal burning rate of a test specimen
taken from the material under test after application of a standard
flame at one end for a period of fifteen seconds. The test specimen is
held horizontally in a U-shaped holder inside a combustion chamber and
flame from a Bunsen burner applied at its end. The ratio of the burnt
distance and time taken to bum through this distance gives a measure of
the flammability.
The GLOBE Flammability
Tester for automobile interior materials consists of a combustion
chamber in which the test is conducted, a test specimen holder in which
the test specimen is mounted during the test, a standard Bunsen burner
to provide the flame, and a set of timers for timing the flame
application time and flaming time.
The combustion chamber is
made form 2 mm thick stainless steel sheet and has a glass /
polycarbonate window for observing the test specimen during the test.
It has a set of ten vent holes of 19 mm diameter on its bottom and a
vent slot of 15 mm width on all the four sides at its top. It is also
provided with a channel for sliding in the test specimen holder. The
chamber is placed on four 10 mm high legs.
The test specimen holder
is made from brass plate and is in two parts, the lower part having a
slot for exposing the test specimen, and an upper plate with
corresponding holes to press down the test specimen from top over the
holding pins. An arrangement to string a heat resistant wire on the
lower frame for providing support to the test specimen is also provided.
The test flame is
obtained from a standard Bunsen burner fixed such that its tip is at a
specified location below the test specimen. An arrangement to control
the flow of gas to the burner to control the height of flame is also
provided. A collection pan is provided below the test specimen holder
to collect the products of combustion. The pan can be moved from
outside of the combustion chamber. A thermometer is also provided to
measure the temperature of the chamber.
A pre:set electronic
timer automatically starts as soon as the test specimen is brought in
position above the Bunsen burner and also cuts off the gas supply to
the burner after a set period of time. Another timer which can be
started and stopped manually records the time taken for the flame to
move from the first reference point to the second reference point.
Technical Specifications
Dimensions of test chamber
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385 x 204 x 360 mm
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Dimensions of test specimen holder
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100 x 360 x 10 mm
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Opening of Bunsen burner
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9.5 mm diameter
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Flame application time
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15 seconds
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Flaming timer
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0 - 999 x 1 second
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Related Specifications
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ISO 3795 - 1989 (E)
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Road Vehicles and Tractor and Machinery for
Agriculture and Forestry - Determination of Burning
Behavior of interior Materials
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JIS K 6400 - 1997
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Test Methods for Flexible Polyurethane Foam
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