yaanabilirlik

Flammability, referred to as yanabilirlik in Turkish, is the ease with which a material can ignite and sustain combustion in air. The concept applies to liquids, solids and gases, but it is most commonly assessed for liquids in industrial safety and transport. Materials are evaluated using metrics that describe fire or explosion risk, including how quickly a substance can ignite and how readily it will burn.

The principal metrics are flash point, autoignition temperature, and flammable limits. The flash point is the lowest temperature at which vapors can ignite in the presence of an ignition source; many standard tests use a closed cup method. Substances with flash points below about 38°C (100°F) are classified as flammable; those with higher flash points are called combustible. Flammable limits, namely the lower flammable limit (LFL) and upper flammable limit (UEL), define the vapor concentration range in air that can ignite. The autoignition temperature is the minimum temperature at which a material will ignite without an external ignition source. Additional considerations include volatility, vapor pressure, surface area and, for solids, dustiness, which can create explosive atmospheres under certain conditions.

Safety and handling focus on preventing ignition and limiting exposure. This includes proper storage in approved containers, adequate ventilation, grounding and bonding to prevent static discharge, segregation from oxidizers or incompatible materials, and clear labeling and hazard communication (GHS). Regulatory frameworks and standards—such as NFPA guidelines, OSHA regulations, and EU CLP/GHS classifications, along with ASTM and ISO test methods—govern assessment, labeling, and safety measures. Common examples of highly flammable liquids are gasoline and ethanol, while many solvents and fuels require stringent controls to minimize fire risk.