ISO 3679 Determination of flash point - Rapid equilibrium closed cup method
WARNING - The use of this International Standard may involve hazardous materials, operations and equipment. This International Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1 Scope
This International Standard specifies a method for the determination of the closed cup flash point of paints (including water-borne paints), varnishes, paint binders, adhesives, solvents, petroleum, and related products having closed cup flash points within the range of -30 °C to 300 °C. When used in conjunction with the flash detector (A.1.6), this International Standard is also suitable for the determination of the flash point of fatty acid methyl esters (FAME).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1513:1992, Paints and varnishes - Examination and preparation of samples for testing
ISO 3170:2004, Petroleum liquids - Manual sampling
ISO 3171:1988, Petroleum liquids - Automatic pipeline sampling
ISO 15528:2000, Paints, varnishes and raw materials for paints and varnishes - Sampling
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 flash point
lowest temperature of the test portion (as measured in the prescribed manner), corrected to a barometric pressure of 101.3 kPa, at which application of a test flame causes the vapour of the test portion to ignite momentarily and the flame to propagate across the surface of the liquid under the specified conditions of test.
4 Principle
A test portion of specified volume is introduced into the test cup, which is maintained at the temperature of the estimated flash point of the material under test. After a specified time, a test flame is applied and the presence or absence of a flash observed. Further tests, with fresh test portions at different temperatures, are carried out until the flash point is determined to the sensitivity specified.
