The (ASTM D) FR Clothing Standard governs the Standard Test Method Flame Resistance of Textiles via vertical testing. ASTM D is the Standard Test Method for Flame Resistance of Textiles ( vertical test). ASTM D is used to determine flame resistance of. ASTM D Test Method for Flame Resistance of Textiles. (Vertical Test). • Pass criteria: max char length of 10 cm. • After-flame of not more than 2 seconds.

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Nfpa – astm d vertical flame test method

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ASTM D method is a laboratory based test that is used to measure the vertical flame resistance of textiles. Small sections of textile are hung, vertically, asym a chamber.

Through the use of a controlled flame, these small samples are exposed for different periods of time. Once the flame is turned off the material continues to burn.


ASTM D Flame Resistance of Textiles ~

The amount of time this material continues to burn is then recorded – this is known as the “After Flame Time”. Once the After Flame Time measurement is recorded another calculation is taken to see how long the material “glows” once the flame has extinguished.

This is commonly referred to as the “After D64413 Time”.

Next a char length measurement is recorded by taking the article and tearing it from the edge of the burn, up to the charred area. Retrieved on March 10, from https: