Pipe
Length
(m)
80
70
60
50
40
30
20
10
X: No adequate or recommended single sample hole size design
Each
pipe
(m)
50
40
30
20
10
N200-102-01
CLASS A PIPE DESIGNS WITH SINGLE SAMPLE HOLE SIZE (Inc. SAMPLING END HOLE)
Number
Hole
End
of holes
size
hole
(mm) (mm) (I/min)
X
‐
‐
X
‐
‐
X
‐
‐
X
‐
‐
3
5.5
5.5
3
6
6
2
6.5
6.5
X
‐
‐
CLASS A PIPE DESIGNS WITH SINGLE SAMPLE HOLE SIZE (Inc. SAMPLING END HOLE)
AND 10m SPACING 2 PIPE (T‐FORM)
Number
Hole
End
of holes
size
hole
(per pipe) (mm) (mm) (I/min)
3
5
3
4.5
4.5
3
4
2
5
1
6.5
6.5
AND 10m SPACING 1 PIPE
Air
Flow
Average
flow
balance
sensitivity
(%/m)
‐
‐
‐
‐
‐
‐
‐
‐
40
0.86
46
0.83
44
0.94
‐
‐
Air
Flow
Average
flow
balance
sensitivity
5
45
0.84
46
0.89
4
46
0.93
5
46
0.96
44
1
14
Alarm
Fan Total hole
level
area
(mm
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
0.20
1
10
71.28
0.20
1
9
84.83
0.14
1
10
66.37
‐
‐
‐
Alarm
Fan
Total
level
hole area
(%/m)
(mm
0.40
1
4
117.83
0.40
1
5
95.44
0.40
1
7
75.41
0.40
2
6
78.55
0.33
3
8
66.37
2
)
‐
‐
‐
‐
‐
2
)
I56-6577-008