CDHF-SVX01N-EN
39
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
”
V
alue
(
lb/min
)
L = Pipe Length (Equivalent Feet)
(Feet x 0.305 = Meters)
N
No
otte
e:: 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.
