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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
L = Pipe Length (Equivalent Feet)
N N o o t t e 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.
CDHF-SVX01N-EN
100
(Feet x 0.305 = Meters)
Pipe Size (I.D.)
Friction Factor
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
1000
V V e e n n t t P P i i p p i i n n g g
39
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