1. Calculate volume of gas released in worse case scenario

Calculation

Initial pressure of gas in cylinder [bar]
Cylinder vol. [m3]
Atmospheric pressure [bar]
 

Result

Volume of gas at atmospheric  [m3]

2. Calculate concentration of gas in room

Calculation

Note: For gas mixtures calculate the volume occupied by the percentage of gas in the mixture. Eg 1% Isobutane in 2.5% Carbon Dioxide
Volume of mixture at atmospheric pressure
Conc of constituent in %
Vol of constituent
Gas Density in Kg/m3
Amount of constituent gas in mgs
Volume of room [m3]

 

Result

Conc. Constitutent in mg/m3

Check the MSDS for the Gas - if 25% of flammability limit could be exceeded protective measures (monitoring, ? Of area, removing ignition sources, flashback arrestors) will be required - contact Safety Office.

3. Calculate Oxygen concentration after release of gas. 

Calculation

Volume of room [m3]
Vol gas atmospheric [m3]
 

 

Result

% Oxygen after release

Normal Conc. Oxygen is 20.95% - concentrations below 18% present serious risk of asphyxiation.