Page 247 - 2026 SMOG

OXYGEN CYLINDER LIFE
Cylinder D E G H
Liters 356 622 5260 6900
Flow (LPM) Length of use Length of use Length of use Length of use
(min) (min) (min) (min)
2 178 311 2630 3450
4 89 155 1315 1725
6 59 104 876 1150
8 44 78 658 862
10 35 62 526 690
12 30 52 438 575
15 23 41 350 460
NOTE: Current MEDEVAC Oxygen Cylinder is “D” type.
To estimate the duration of use for Oxygen Cylinders:
• Duration of Flow = Contents of cylinder/Flow rate.
Cylinder Factors for Calculation of Duration of Oxygen Flow:
Cylinder Size D E G H and K
Factor 0.16 0.28 2.41 3.14
Once you have the cylinder factor and the amount of pressure remaining in the cylinder, the
duration of flow can be calculated with the following equation.
Duration of flow (min) = Pressure (psig) × Cylinder Factor/Flow (L/min)

2026 Standard Medical Operating Guidelines (SMOG) • 239