Page 536 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

502 Applied Process Design for Chemical and Petrochemical Plants

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[ l Using scaling: Z = 150/ (7.61) 1 = 76.25 ft/lb 13
[
w = ( 9316.8 ) ( 1500) ] l _ ( 14. 7 ) l.:!4� I
c
1.41- 1 64.7 (See following paragraph.)
= l.193X 10 7, ft lb Reading chart, Figure 7-59
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= (l.193Xl0 )(0.324lcal/ft-lb)
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W c = 0.38665 X 10 calories Overpressure, p? = 0.37 psi at a distance of 150 feet.
Mass of TNT = mrnT = 0.38665 X 10 I 1 ] 20 cal/ gm TNT This overpressure would produce some glass breakage,
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= 3452 gm TNT ceiling damage, and minor structural damage. See Dam-
lb TNT= 3452/453 gm/lb= 7.610 lb TNT age Tables 7-24 and 7-25A and B.

Scaled distance, z (•r/W 113) (ft/lb 113)
Figure 7-59. Peak overpressure vs. scaled distance for a blast wave from an explosion of TNT. By permission of the publishers, Butterworth-
Heinemann, Ltd., Lees, F. P., Loss Prevention in the Process Industries, Vol. 1, p. 574 (40].