Flammability limit

is a specific limit of gas concentration when gas and air mixtures may become flammable (explode).
The lower explosive limit (LEL) identifies the smallest amount of gas in a mixture able to sustain a flame (when ignited). The upper explosive limit (UEL) is the smallest amount of gas in a mixture that can cause spontaneous (with no heat inflow from the outside) propagation of flame (self-ignition). Here are explosion limits for most widespread gases in air mixtures:
  • H2: LEL=4.0; UEL=94.0% by volume
  • СО: LEL=12,.5; UEL=94.0% by volume
  • CH4: LEL=5.0; UEL=61.0% by volume
  • C3H8: LEL=2.2; UEL=5.5% by volume
  • C3H10: LEL=1.7; UEL=49.0% by volume

Glossary of Oil and Gas. 2013.

Look at other dictionaries:

  • Flammability limit — Flammability limits, also called flammable limits, or explosive limits give the proportion of combustible gases in a mixture, between which limits this mixture is flammable. Gas mixtures consisting of combustible, oxidizing, and inert gases are… …   Wikipedia

  • explosion limit, flammability limit —    The highest or lowest concentration of a flammable gas or vapor in air that will explode or burn readily when ignited. This limit is usually expressed as a volume percent of gas or vapor in air.explosive range, flammability range The set of… …   Forensic science glossary

  • Flammability — DIN4102 Flammability Class B1 Vertical Shaft Furnace at Technische Universität Braunschweig, iBMB, Germany …   Wikipedia

  • Lower flammable limit — Lower flammability limit (LFL), usually expressed in volume per cent, is the lower end of the concentration range of a flammable solvent at a given temperature and pressure for which air/vapor mixtures can ignite. The flammability range is… …   Wikipedia

  • Limiting oxygen concentration — Flammability diagram, green dotted line shows safe purging of an air filled vessel, first with nitrogen, then with methane, to avoid the flammable region. The limiting oxygen concentration is shown in the lower right of the diagram. Limiting… …   Wikipedia

  • Glossary of fuel cell terms — The Glossary of fuel cell terms lists the definitions of many terms used within the fuel cell industry. The terms in this glossary may be used by fuel cell industry associations, in education material and fuel cell codes and standards to name but …   Wikipedia

  • ГОСТ Р 54110-2010: Водородные генераторы на основе технологий переработки топлива. Часть 1. Безопасность — Терминология ГОСТ Р 54110 2010: Водородные генераторы на основе технологий переработки топлива. Часть 1. Безопасность оригинал документа: 3.37 авария (incident): Событие или цепочка событий, которые могут привести к ущербу. Определения термина из …   Словарь-справочник терминов нормативно-технической документации

  • Oxy-fuel welding and cutting — Oxyacetylene redirects here. For the song, see Cubanate. Side of metal, cut by oxygen propane cutting torch …   Wikipedia

  • Жидкий водород — Бак для жидкого водорода в автомобильном музее (Альтлусхайм, Германия) немецкой химической компании …   Википедия

  • LFL — abbr. Lower Flammability Limit …   Dictionary of abbreviations


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.