Trane CenTraVac CVHE - Page 45

CVHE-SVX005C-EN
45
Figure 27. Rupture disk vent pipe sizing; for use with the preceding table
Pipe size as a Function of “C” Value and Length of Run
1000
100
10
10 100 1000
6 NPS
(6.065)
f=0.0149
5 NPS
(5.048)
f=0.0155
4 NPS
(4.026)
f=0.0163
3 NPS
(3.068)
f=0.0173
Pipe Size (I.D.)
Friction Factor
“C” Value (lb/min)
L = Pipe Length (Equivalent Feet)
(Feet x 0.305 = Meters)
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