Simplex STS User Manual

10
Each tank and each compartment of a compartment
tank shall have provision for both normal and emer-
gency venting. A vent opening shall be in addition to
the lling and withdrawal openings. A vent opening
that provides both emergency and normal venting
shall have a capacity not less than that specied in
the Venting Capacity Table below. e wetted area
of a tank is calculated on the basis of 75% of the total
exposed area.
vent openIngS
VENTING CAPACITY
WETTED SURFACE,
SQUARE FEET
b,c
VENTING CAPACITY,
CUBIC FEET PER HOUR
d, e
MINIMUM OPENING,
NOMINAL PIPE SIZE, INCHES
f
20 21,100 2
30 31,600 2
40 42,100 3
50 52,700 3
60 63,200 3
70 73,700 4
80 84,200 4
90 94,800 4
100 105,000 4
120 126,000 5
140 147,000 5
160 168,000 5
180 190,000 5
200 211,000 6
250 239,000 6
300 265,000 6
350 288,000 8
400 312,000 8
500 354,000 8
600 392,000 8
700 428,000 8
800 462,000 8
900 493,000 8
1000 524,000 10
1200 557,000 10
1400 587,000 10
1600 614,000 10
1800 639,000 10
2000 662,000 10
2400 704,000 10
2800 and over 742,000 10
a At 14.7 psia and 60°F (101.4kPa and 16°C)
b Interpolate for intermediate values
c For SI units, m2 = ft2 /0.09
d These values taken from NFPA 30
e For SI units, m3/s = ft/hr X 0.03
f Thesepipesizesapplyonlytoopenventpipesofthespecieddiameternotmorethan12inches(0.3m)longanda
pressuretankofnotmorethan2.5psig(17.1kPa).Iftankistobeequippedwithventingdeviceoramearrestor,the
ventopeningistoaccomodatetheventingdeviceoramearrestorsizedinaccordancewithcolumn2ofthistable.

Simplex STS Specifications

General

Brand	Simplex
Model	STS
Category	Industrial Equipment
Language	English