TSI Instruments PANDA PAN200 Series, Руководство по эксплуатации и обслуживанию

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Leakage Testing Standards Highlights
25
o
Calculated values of
1.
Leakage factor (f)
2. Air leakage limit (f
max
) according to the formulas given in
table above at the measured test pressure (p
test
)
o
Air tightness class achieved
 For tests including several test pressures it is recommended to
plot the leakage factors as a function of test pressure in a diagram
together with the air leakage limit curve.
US Standards
Ductwork classification and maximum air leakage
Duct Class
½-, 1-,
2-inwg
3-inwg 4-, 6-, 10-inwg
Seal Class C B A
Sealing
Applicable
Transverse
Joints Only
Transverse
Joints and
Seams
Joints, Seams
and All Wall
Penetrations
Leakage Class
Rectangular
Metal
24 12 6
Round
Metal
12 6 3
Maximum air leakage is then defined as
F=C
L
P
0.65
where: F = Maximum air leakage (cfm/100 ft
2
)
C
L
= Leakage class
P = Pressure (inwg)
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