Data Sheet
Bulletin 74.1:T205B
6
(1)
60 2500 9500 60 1.6
100 4200 16,000 100 2.7
500 21,000 79,500 500 13.4
1000 42,000 159,000 1000 26.8
2000 84,000 318,000 2000 53.6
3000 126,000 477,000 3000 80.4
4000 168,000 636,000 4000 107
5000 210,000 795,000 5000 134
10,000 420,000 1,590,000 10,000 268
15,000 630,000 2,385,000 15,000 402
20,000 840,000 3,180,000 20,000 536
25,000 1,050,000 3,975,000 24,000 643
30,000 1,260,000 4,769,000 28,000 750
35,000 1,470,000 5,564,000 31,000 831
40,000 1,680,000 6,359,000 34,000 911
45,000 1,890,000 7,154,000 37,000 992
50,000 2,100,000 7,949,999 40,000 1072
60,000 2,520,000 9,539,000 44,000 1179
70,000 2,940,000 11,129,000 48,000 1286
80,000 3,360,000 12,718,000 52,000 1394
90,000 3,780,000 14,308,000 56,000 1501
100,000 4,200,000 15,898,000 60,000 1608
120,000 5,040,000 19,078,000 68,000 1822
140,000 5,880,000 22,257,000 75,000 2010
160,000 6,720,000 25,347,000 82,000 2198
180,000 7,560,000 28,616,000 90,000 2412
1. Flash point is below 100°F / 38°C or normal boiling point is below 300°F / 149°C.
Table 6. Flow Rate Required due to Thermal Cooling
When sizing a gas blanketing regulator system for
a low-pressure blanketing application, consider
the replacement of blanketing gas required for the
liquid loss during pump out of the vessel plus the
condensation/contraction of vessel vapors during
atmospheric thermal cooling. Using the established
procedures from American Petroleum Institute
Standard 2000 (API 2000), determine the ow rate of
blanketing gas required.
Q
total
= Q
pump
+ Q
thermal
Where,
Q
total
: Required Flow Rate.
Q
pump
: Required Flow Rate to replace pumped
out liquid.
Q
thermal
: Required Flow Rate due to thermal cooling.
(See Table 6)
Table 7. Correction Factors (For Converting Air Flow Rates to Other Gas Flow Rates)
(1)
Natural Gas 0.60 1.291
Nitrogen 0.97 1.015
Dry CO
2
1.52 0.811
1. For gases of other specic gravities, use equation below.
Correction Factor =
1.00
SG