To ensure the Horizontal Flammability test results are accurate, following is a recommended check list that was established by the AL2A MTAC Meeting Members to identify the most common items to look for to ensure your tests are conducted in a manner that will ensure accurate and reliable test results.
Pre-Test Check List
Contamination of specimen
(hand lotion, oil from hand, silicone from saw blade, surface contaminants)
source incorrect (using propane, for example)
Improper fume hood draft control. Test run draft free
Blocking of ventilation holes
in test apparatus
Re-ignition of specimen from droplets
Improper placement of specimen to burner tip.
The tilting of the burner
(this is a BIG issue!)
Specimen not prepared properly. Bias cut give radical results
Inaccurate timing and inaccurate measurement
Introduction of foreign materials into test apparatus, i.e. foil for drip
Not cleaning debris from frames and support wires between
Test specimens need to be flat, without any bends or curves
Improper sample size. Note customer requirements
criteria. GM and Nissan have statistical requirements, for
example. Some OEMs specify 80 mm/min max burn rate.
Difficult to conduct
any type of Measurement System Analysis or make any
interlaboratory competency or proficiency conclusions
Note measurement thickness
13 mm is the maximum thickness
Note composites that are adhered 100 % versus materials not adhered (like cut and sew)
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Flammability Testers Vertical
45 Degree Flammability Testers