U-pipe network, Class C with In-line filter
Exhaust pipe of 5m (E), T-junction 10m (T), Branch of 30m (B1), First hole at 5m (F), 6 holes
and Branch 2 of 28m (B2)
4. For Branch 2, calculate nominal step between holes and hole position deviation from nominal
5. For Branch 2, first hole position can be 5±0.9m
Required Rules
E Exhaust pipe 5m ≤ 14 m
T T-junction position 10 ≤ 10 m (15m-E)
B1 Branch length 30m
PL Pipe length with low speed
with high aspirator speed
5+10+30=45m ≤ 45 m
≤ 65 m
N Number of holes 6 See Table
S2 = L2 / ( Number of holes – 1 ) = 23 / 5 = 4.6 m (≥2,5m)
± 0.2*4.6m = ±0.9m
Example:
L1 Last hole position, Branch 1 45-5-10-5=25m
F First hole, Branch 1 5m
1.25 ÷ 25m
L2 Last hole, Branch 2 28-5=23m
B2 Branch 2 length 28m
27 ÷ 30m
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