Explanation

Test method for evaluating the combustion performance by measuring the linear combustion speed when one end of the materials sample is held horizontally and the free end is exposed to the flame of the specified gas. Prepare the tested materials into a rectangular cylinder sample of specified size, clamp one end of the sample so that the long axis is horizontal and the horizontal axis is 45 ° from the horizontal. If the materials is not self-supporting, use a special support fixture to place the sample. Draw a line at a distance of 25mm and 100mm from the free end of the sample, exposing A to the ignition source at the specified flame height, and ensuring that the flame depth is within the specified value. Without changing the position of the ignition source, apply flame to the sample for 3 seconds and then remove the ignition source? Calculate the combustion speed according to the combustion application time and burning length. It is applicable to evaluating the combustion performance of solid materials and foam materials with apparent density greater than 250kg/m3. The results can be used to evaluate the combustion characteristics of different materials, and this item is also a must test item in the certification. This test method is carried out under specified test conditions and cannot be used to assess the risk of ignition under actual service conditions. This property is only one of many combustion properties and is not applicable to materials that shrink without ignition.

Classification