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What Does Flammability Range Mean? The flammability range describes the minimum and maximum concentrations at which a given vaporous substance will ignite or combust when mixed with air. The minimum concentration is referred to as either the lower flammable limit or lower explosive limit (LFL/LEL), while the maximum concentration is referred to ...
The Flammable Range (also called Explosive Range) is the concentration range of a gas or vapor that will burn (or explode) if an ignition source is introduced. Three basic requirements must be met for explosion to take place: flammable substance - fuel; oxidizer - oxygen or air; source of ignition - spark or high heat
Flammable gas means a gas having a flammable range with air at 20 °C (68 °F) and a standard pressure of 101.3 kPa (14.7 psi). A pyrophoric gas means a flammable gas that is liable to ignite spontaneously in air at a temperature of 54 °C (130 °F) or below.
The proposed rule, available at 74 Federal Register 50280 (Sept. 30, 2009), proposes new definitions for combustible and flammable liquids that correspond with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS).
A material is flammable if it ignites easily at ambient temperatures. In other words, a combustible material ignites with some effort and a flammable material catches fire immediately on exposure to flame.
Flammable liquid is any liquid having a flashpoint at or below 199.4 °F (93 °C). Flammable liquids are divided into four categories as follows: Category 1 shall include liquids having flashpoints below 73.4 °F (23 °C) and having a boiling point at or below 95 °F (35 °C).
Mixtures of dispersed combustible materials (such as gaseous or vaporised fuels, and some dusts) and oxygen in the air will burn only if the fuel concentration lies within well-defined lower and upper bounds determined experimentally, referred to as flammability limits or explosive limits.
Flammable Range: This concept applies mainly to gases and vapors and is defined by the Lower Explosive Limit (LEL) and Upper Explosive Limit (UEL). It describes the concentration range in air within which the substance can ignite.
Flammability is the measure of how quickly a material can catch on fire when exposed to an ignition source. It’s an important concept to understand, especially if you work with combustible materials in any capacity.
What Does Explosive (Flammable) Range Mean? The explosive flammable range of a combustible gas or vapor is the range between the lower exposure limit (LEL) and the upper exposure limit (UEL) for that particular gas or vapor.