This standard specifies the test method for measuring the combustion performance of flame retardant dipped canvas by horizontal combustion test method, which is applicable to the test of the combustion performance of flame retardant dipped canvas made of polyester, nylon and other synthetic fibers. The test principle includes using a specific blowtorch, igniting the sample at a designated position for a certain period of time, removing the blowtorch, observing and recording the flaming combustion time, flameless combustion time and combustion damage length of the sample. The test equipment should meet certain requirements, including the test chamber Interior volume is at least 0.5 m3, the front is equipped with a transparent observation door, equipped with a movable adjustable blowtorch clamping device, and an exhaust device that can be opened and closed at any time.