Explanation

A test method for evaluating the combustion performance of materials. Under the specified test conditions, in the mixed flow of oxygen and nitrogen, measure the minimum oxygen concentration just enough to maintain the stable combustion of the sample. According to the different types of materials, such as plates, profiles, foam, films or films, the samples shall be processed according to the specified dimensions, and the samples shall be fixed at the center of the combustion cylinder with a fixture; If it is a liquid materials, a certain amount of samples shall be taken according to the regulations and placed in a special sample tray, and then fixed in the combustion cylinder. Make the mixed flow of oxygen and nitrogen flow through the combustion cylinder from bottom to top at the specified flow rate, and adjust the flow of oxygen and nitrogen as required to make the oxygen concentration meet the test requirements. Determine the ignition mode according to the sample form, ignite the sample with an igniter to record the combustion time and combustion length of the sample, and use the statistical method of "small sample lifting method" according to the specified criteria to determine whether to increase or decrease the oxygen concentration. Calculate by testing a set of samples at different oxygen concentrations.

Classification