
Bulletin 74.1:Y693
7
Table 4. Flow Rate Conversion (Gas flow required to replace or displace Blanketing Gas with Pump-Out or Pump-In of Liquid)
MULTIPLY MAXIMUM PUMP RATE IN: BY TO OBTAIN:
U.S.GPM
U.S.GPH
Barrels/hour
Barrels/day
8.021
0.1337
5.615
0.2340
SCFHairrequired
SCFHairrequired
SCFHairrequired
SCFHairrequired
Table 5. Gas Flow Required for Thermal Heating (Outbreathing) or Cooling (Inbreathing) per API 2000 (Interpolate for Intermediate sizes)
VESSEL CAPACITY AIR FLOW RATE REQUIRED
Barrels gal. SCFH Nm
3
/h
60
100
500
1000
2000
2500
4200
21,000
42,000
84,000
60
100
500
1000
2000
1.6
2.7
13.4
26.8
53.6
3000
4000
5000
10,000
15,000
126,000
168,000
210,000
420,000
630,000
3000
4000
5000
10,000
15,000
80.4
107
134
268
402
20,000
25,000
30,000
35,000
40,000
840,000
1,050,000
1,260,000
1,470,000
1,680,000
20,000
24,000
28,000
31,000
34,000
536
643
750
831
911
45,000
50,000
60,000
70,000
80,000
1,890,000
2,100,000
2,520,000
2,940,000
3,360,000
37,000
40,000
44,000
48,000
52,000
992
1072
1179
1286
1394
90,000
100,000
120,000
140,000
160,000
3,780,000
4,200,000
5,040,000
5,880,000
6,720,000
56,000
60,000
68,000
75,000
82,000
1501
1608
1822
2010
2198
180,000 7,560,000 90,000 2412
Ordering Information
Whenordering,specify:
Application
1. Type of gas being used for blanketing (nitrogen,
fuelgas,etc.);listanyfactorssuchasimpurities
in the gas that may affect compatibility of the gas
with the regulator trim parts.
2. Specicgravityofthegas
3. Temperature of the gas
4. Rangeofowinginletpressurestoregulator
5. Regulator pressure setting
6. Flow rates
a) Minimumcontrolledow
b) Normalow
c) Maximumow
7. Line size and end connection size of adjacent piping
Regulator
RefertotheSpecicationstableonpage2.Carefully
reviewthedescriptionofeachspecicationandspecify
the desired selection wherever there is a choice to be
made.Alwaysspecifythetypenumberasidentiedin
theAvailableCongurationsspecication.
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