This standard describes the method of flash point testing using a small-scale closed-cup tester for liquid fuels such as petroleum products and biodiesel. It covers the Temperature range of -30 ° C to 300 ° C and provides flash point data for test samples under controlled laboratory conditions. The standard requires the use of smaller sample sizes and shorter test times to accurately assess the flammability of materials. It is an important basis for the classification of flammable materials in regulations and safety management.