ASTM 6413/6413M
ASTM D6413/D6413M is a critical test method used to evaluate the flame resistance of textiles, particularly those intended for use in environments where protection against flash fire hazards is necessary. Here’s a detailed overview based on the information provided:
Purpose and Overview:
Objective: ASTM D6413/D6413M determines whether a textile material will continue to burn after the source of ignition (a controlled methane flame) is removed.
Test Setup: A 12-inch specimen of fabric is vertically suspended in an enclosed chamber, secured on three sides. The bottom edge of the fabric is exposed to a controlled methane flame for 12 seconds.
Measurements: After exposure to the flame, several characteristics are measured:
Afterflame: Duration of continued flaming after removal of the ignition source.
Afterglow: Duration of glowing or smoldering after the flame is extinguished.
Char Length: Length of the residual charred portion of the fabric.
Testing Protocol: Five tests are typically conducted, and the results are averaged and reported to determine compliance with specific standards.
Standards and Compliance:
Applications: ASTM D6413/D6413M is used to assess compliance with various standards that mandate flame resistance for textiles. For example:
It is referenced in OSHA 1910.269, which outlines safety standards for electric power generation, transmission, and distribution.
ASTM F1506, which specifies requirements for flame-resistant clothing for protection against electric arc hazards, uses ASTM D6413/D6413M to set criteria such as maximum char length.
NFPA 2112, another important standard for flame-resistant garments, also considers the results of ASTM D6413/D6413M for compliance.
Limitations and Considerations:
Char Length vs. Protective Performance: It's important to note that while char length is measured in this test, it does not directly correlate with the thermal protective performance of fabrics in actual flash fire scenarios. Some fabrics with lower char lengths may still have higher body burn percentages in more comprehensive tests like the manikin test (e.g., ASTM F1930).
Standard Availability: The ASTM D6413/D6413M standard can be purchased and downloaded directly from the ASTM website, providing detailed procedures and guidelines for conducting the test.
For further details or to access the ASTM D6413/D6413M standard, visit the ASTM website: ASTM D6413/D6413M.