When a blast occurs, the increase in pressure is associated with a high speed wind. Even a small increase in pressure can be associated with a significant wind.
Overpressure in psi at Sea Level
Wind Velocity in miles per hour
0.02
40
0.10
70
0.25
125
0.60
160
2
290
8
470
16
670
40
940
125
1,500
where:
• psi = pounds per square inch
• 1 psi = 51.71 mm Hg at °C = 0.0680 atmospheres
If this is analyzed in JMP:
wind velocity in miles per hour for overpressure [psi <= 2] =
= (195.275 * SQRT(psi)) + 14.125
wind velocity in miles per hour for overpressure [psi > 2] =
