The standard "SN/T 3077.1-2012 Normally Closed Cup Flash Point Determination Method" specifies the method for determining the flash point of liquids by the normally closed closed cup method. The standard applies to all kinds of liquid samples, and the flash point of liquids is determined by the closed cup method to evaluate their flammability and safety. The standard describes in detail the measurement principle, the selection and calibrating requirements of instruments and equipment, as well as specific test procedures and data processing methods. The implementation of this standard can ensure the accurate measurement of the flash point of liquid samples, providing necessary technical support for safe production and product quality control.