Current standards for evaluation of melting behavior either require comments regarding melting and dripping during a brief exposure to direct such as ASTM D6413, "Standard Test Method for Flame Resistance of Textiles (Vertical Test" (12 seconds) or a longer exposure to heat in an oven at 500F (260C) as required in many NFPA standards such as NFPA 2112, Section 8.4 Heat and Thermal Shrinkage Resistance Test (5 minutes), or NFPA 1972, Section 8.57 Resistance to High Temperature Blocking Test (6 hours). For flammable materials which may be used as undergarments with flame resistant clothing as described in NFPA 2112 and NFPA 2113, ASTM D6413 may leave little or no charred material to examine for evidence of melting. Oven tests such as those used by NFPA involve longer times at lower temperatures that may not be relevant flash fire scenarios. In addition, ability to conduct these oven tests is not widely available due to the need for special exhaust control and breathing protection needed in areas where the tests are conducted. This effort seeks to develop a relatively quick and easy method to better evaluate melting behavior using widely available equipment. ASTM D6413 was chosen as a basis for this new test for this reason.
The title and scope are in draft form and are under development within this ASTM Committee.