Gas Chart

  1. Hydrogen
    • H2
    • 0.07
    • Non poisonous, will not support life
    • LEL 4%
    • UEL 74%
    • colour Less, Odourless, Tasteless
    • After damp, spon-com, battery charging
    • No legal limit
  2. Methane
    • CH4
    • 0.55
    • Non poisonous, slightly narcotic affect at high levels
    • LEL 5%
    • UEL 14%
    • C/O/T
    • Roof, Fire damp, After damp, Heatings
    • Evacuate 2.5%
  3. Carbon Monoxide
    • CO
    • 0.97
    • Poision, displaces O2 in blood
    • LEL 12.5%
    • UEL 74%
    • C/O/T
    • Combustion, White damp, After damp
    • LL 30ppm
  4. Nitrogen
    • N2
    • 0.97
    • Non poisonous
    • Inert
    • C/O/T
    • Atmosphere, Most damps
    • No legal limit
  5. Oxygen
    • O2
    • 1.11
    • Essential to life
    • Non flammable, supports combustion
    • C/O/T
    • 19% Minimum
  6. Hydrogen Sulphide
    • H2S
    • 1.19
    • Poisonous, Fatal at 500 ppm, Instant death at 1000 ppm
    • LEL 4.5%
    • UEL 45%
    • Colourless, Rotten egg odour, Sweet taste
    • Stagnant water, Heating in coal containing Pyrites, Seam gas
    • LTEL 10 ppm
    • Max 15 ppm
  7. Carbon Dioxide
    • Co2
    • 1.53
    • Increases respiration 300% at 5%
    • Toxic above 5%
    • Possibly fatal above 15%
    • Inert
    • Colourless, Pungent smell, Soda taste
    • Seam gas, Black damp, After damp, Choke damp, Combustion
    • 1.25% TWA
  8. Nitrogen Dioxide
    • NO2
    • 1.6
    • Poisonous, 200 ppm possibly fatal
    • Non flammable but supports combustion
    • Reddish brown, Acrid smell, Acidic taste
    • Shot firing, Diesels, After damp
    • LTEL 3 ppm
    • > 3 ppm TWA
    • Max 5 ppm
  9. Sulphur Dioxide
    • SO2
    • 2.26
    • Poisonous, 500 ppm fatal
    • Inert
    • Colourless, Burning sulphur smell, Acidic taste
    • Heatings, After damp
    • LTEL 2 ppm
    • > 2 ppm TWA
    • Max 5 ppm
Author
Bblue
ID
350282
Card Set
Gas Chart
Description
Coal mine gas chart
Updated