Hazard Evaluation Tools

Oxygen Deficiency Hazard - Compressed Gases

January 12, 2010 - Revision 3

This page provides an evaluator a tool to aid in the performance and documentation of an Oxygen Deficiency Hazard Calculation as required by the SBMS Subject Area, Oxygen Deficiency Hazards (ODH), System Classification and Controls .

Note: This tool is not applicable for cryogens or liquefied gases such as Carbon Dioxide.

Cylinder Size:	Select a Cylinder Size K A B C D AL BL CL XL SSB 10S LB XF XG XM XP QT LP5 Other
System Type:	Select a System Type Cylinder Cylinder with Simple Manifold Cylinder with Complex Manifold
Failure Rate:
# of Cylinders:
Cylinder Volume (ft3):
Cylinder Pressure (psig):
Free Room Volume (ft3):		Calculate
Minimum Oxygen Concentration without ventilation:
ODH fatality rate (per hour) F
ODH Class:
If ventilation is used and/or Leak Rate is known:
Minimum Room Ventilation Rate (ft3/min)
Ventilation Draws In Fresh Air:	Yes No
Leak Rate (ft3/min) - R:		Typical Leak Rates Table
Maximum Leak Time (min):
Oxygen Concentration at End of Leak:
Safe Re-enter Time (min):
ODH fatality rate (per hour) F - With Ventilation:
ODH Class - With Ventilation: