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Round Holes
 
   
600 STAGGERED
Holes per SQ. Inch =
745
F2
% Open Area =
% Open Area = 0.122 x Hole per SQ. Inch x d2
OR
% Open Area =
90.7 X
(d/F)2
 
 
STRAIGHT
 
Straight Pattern

Holes per SQ. Inch =
645
F2

% Open Area = 0.122 x Hole per SQ. Inch x d2
 
 
450 STAGGERED
 
450 Staggered

Holes per SQ. Inch =
645
P2

% Open Area = 0.122 x Hole per SQ. Inch x d2
 
 
PERFORATION PATTERN
 
   
1) 600 Staggered Far Apart
2) Straight
3) 600 Staggered Close
4) 450 Staggered Far Apart
5) 450 Staggered Close

 

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