Trane CenTraVac CDHH - Page 42

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CDHH-SVX003C-EN
Figure 29. Rupture disk vent pipe sizing (SI units); for use with preceding table
Pipe size as a Function of “C” Value and Length of Run
“C” Value (kg/s)
L = Pipe Length (Equivalent Meters)
Pipe Size (I.D.)
Friction Factor
150 DN
154 mm
f = 0.0149
125 DN
128 mm
f = 0.0155
100 DN
102 mm
f = 0.0163
80 DN
78 mm
f = 0.0173
10
1
0
10 100 1000
Note: The preceding figure, provided as a reference, is based on ASHRAE Standard 15. Vent line size is typically dictated by
state or local code which may be different from ASHRAE Standard 15 requirements.
Vent Piping