Standard Test Method for Flash Point by Tag Closed Cup Tester.
Get more information about the standard at ASTM D56-21a.
ASTM D56 is a globally recognized standard for determining the flash point of volatile liquids and petroleum products with flash points below 200°F (93°C). This standard uses the Tag Closed Tester, a closed-cup method for measuring the temperature at which a liquid emits enough vapor to ignite when exposed to an ignition source under controlled conditions. With its broad application across industries and robust compliance instruments, ASTM D56 is a cornerstone for safe handling of flammable materials.
Details
The method described in ASTM D56 minimizes vapor loss and ensures accurate and reproducible results. It is critical for safety assessments, regulatory compliance and product classification, especially for materials classified as flammable or combustible. Flash point testing to this standard is essential to assess the risk of fire during storage, transportation and handling. The procedure includes precise heating, vapor barrier and controlled ignition to determine the flash point.
Industries & Applications
ASTM D56 is widely applied in industries dealing with volatile liquids, where safety and compliance are paramount:
- Petroleum: Testing fuels such as gasoline, kerosene, and aviation fuel for classification and hazard assessment
- Chemicals: Ensuring safety in handling flammable solvents and chemical mixtures
- Transportation and logistics: Classifying hazardous materials for safe storage and shipping
- Paints and coatings: Evaluating the flash points of thinners and other volatile substances
- Pharmaceutical, flavors & fragrance: Testing alcohol-based products like sanitizers or fragrances