Polttopolttovälin

Polttopolttovälin is a Finnish term used primarily in fire safety engineering, combustion research, and pyrotechnics to describe the interval or spacing related to ignition events. The word is formed from poltto, meaning combustion, and väli, meaning interval or gap, with the genitive form polttopolttovälin used when referring to “the polttopolttoväli of X” or “the polttopolttovälin ii.” In practice, the exact meaning depends on the context of the study or test.

In practice, polttopolttovälin can refer to either a temporal or a spatial measure. As a temporal concept, it denotes the time between successive ignition events in a controlled sequence or burn test. As a spatial concept, it denotes the physical distance between ignition sources or between areas of ignition within a test setup. The choice between these interpretations is dictated by the experimental design, safety requirements, and the standards governing the procedure.

Usage and documentation of polttopolttovälin appear mainly in Finnish-language technical reports, research articles, and standards related to combustion testing and incendiary device safety. The term is not widely standardized in international terminology, and in English-language sources it is often translated more descriptively as “ignition interval” or “spacing between ignition points,” depending on context.

See also: Combustion, Ignition, Pyrotechnics, Fire safety, Fire testing.