This standard specifies a test method for simulating and determining the combustion characteristics of conveyor belts under small-scale flame conditions in a laboratory setting. The core principle involves applying a flame to a conveyor belt specimen of specified dimensions and precisely measuring and recording key parameters such as the duration of sustained flame combustion, afterglow (incandescence) time, and the length of the burned area to evaluate its flame-retardant properties. The primary testing apparatus defined in the standard is a laboratory-scale combustion test chamber, typically a vertical or horizontal enclosure with a glass observation window, equipped with a standardized gas burner, specimen holder, and timer. Through this series of standardized procedures and evaluations, the method provides a unified basis for assessing the flame-retardant rating and fire safety performance of conveyor belt products.