For Pipeline Quality Natural Gas
High Pressure Storage Systems
The chart below summarizes the relationship of pressure and volume for natural gas with a specific gravity of 0.6 and a temperature of 70º F. The chart lists the volume of natural gas in terms of standard cubic feet gas volume (SCFgv) that can be compressed into one standard cubic foot water volume (SCFwv). Among the many uses of this chart, it can be used to estimate how much gas a NGV needs to refuel or to determine how much gas is usable from storage. A few examples are provided to demonstrate how the chart can be used.
Example 1 - What is the water volume of a natural gas cylinder that has a capacity of 763 SCFgv at 3600 PSIG?
From the chart, 296.34 SCFgv are compressed into 1 SCFwv at 3600 PSIG.
763 SCFgv / (296.34 SCFgv / SCFwv) = 2.57 SCFwv
Example 2 - How much buffer storage rated to 5000 PSIG is equired to provide 2500 SCFgv to fill NGVs to 3000 PSIG?
Tip: to insure quick filling allow a minimum of 400 PSI differential pressure between the fill pressure of the vehicle and the pressure remaining in storage at the end of the fill (3000 PSIG + 400 PSID = 3400 PSIG).
From the chart, 356.93 SCFgv are compressed into 1 SCFwv at 5000 PSIG and 284.75 SCFgv are compressed into 1 SCFwv at 3400 PSIG.
356.93 - 284.75 = 72.18 SCFgv / SCFwv
2500 SCFgv / (72.18 SCFgv / SCFwv) = 34.2 SCFwv (water volume required in storage)
34.2 SCFwv × (356.93 SCFgv / SCFwv) = 12,362 SCFgv
Check: At 3400 PSIG, 34.2 SCFwv × (284.75 SCFgv / SCFwv) = 9,738 SCFgv
12,362 - 9,738 = 2,624 SCFgv available from storage
Standard Cubic Feet (SCF) of Natural Gas Compressed into One Cubic Foot of Water Volume at Given Pressures
Pressure
PSIG |
SCF Per
Cubic Foot
Water Volume |
Pressure
PSIG |
SCF Per
Cubic Foot
Water Volume |
Pressure
PSIG |
SCF Per
Cubic Foot
Water Volume |
Pressure
PSIG |
SCF Per
Cubic Foot
Water Volume |
Pressure
PSIG |
SCF Per
Cubic Foot
Water Volume |
| 0 |
1.00 |
1050 |
84.54 |
2100 |
185.67 |
3150 |
267.84 |
4200 |
325.90 |
| 50 |
4.45 |
1100 |
89.24 |
2150 |
190.06 |
3200 |
271.73 |
4250 |
327.90 |
| 100 |
7.92 |
1150 |
93.79 |
2200 |
194.45 |
3250 |
275.14 |
4300 |
329.88 |
| 150 |
11.55 |
1200 |
98.40 |
2250 |
198.84 |
3300 |
278.46 |
4350 |
332.21 |
| 200 |
15.15 |
1250 |
103.19 |
2300 |
203.23 |
3350 |
281.61 |
4400 |
334.52 |
| 250 |
18.76 |
1300 |
107.78 |
2350 |
207.89 |
3400 |
284.75 |
4450 |
336.44 |
| 300 |
22.49 |
1350 |
112.56 |
2400 |
213.39 |
3450 |
287.51 |
4500 |
338.33 |
| 350 |
26.34 |
1400 |
117.39 |
2450 |
216.96 |
3500 |
290.24 |
4550 |
340.58 |
| 400 |
30.02 |
1450 |
122.29 |
2500 |
221.36 |
3550 |
293.30 |
4600 |
342.43 |
| 450 |
33.93 |
1500 |
127.24 |
2550 |
225.47 |
3600 |
296.34 |
4650 |
343.89 |
| 500 |
37.82 |
1550 |
132.26 |
2600 |
229.57 |
3650 |
298.29 |
4700 |
345.71 |
| 550 |
41.86 |
1600 |
137.34 |
2650 |
233.06 |
3700 |
300.92 |
4750 |
348.62 |
| 600 |
45.96 |
1650 |
142.13 |
2700 |
236.82 |
3750 |
303.52 |
4800 |
350.39 |
| 650 |
49.92 |
1700 |
147.13 |
2750 |
241.19 |
3800 |
306.46 |
4850 |
351.78 |
| 700 |
54.04 |
1750 |
151.81 |
2800 |
244.92 |
3850 |
309.38 |
4900 |
353.14 |
| 750 |
58.47 |
1800 |
156.31 |
2850 |
248.64 |
3900 |
311.92 |
4950 |
354.86 |
| 800 |
62.64 |
1850 |
161.43 |
2900 |
252.33 |
3950 |
314.06 |
5000 |
356.93 |
| 850 |
67.01 |
1900 |
166.61 |
2950 |
256.01 |
4000 |
316.55 |
5050 |
358.90 |
| 900 |
71.54 |
1950 |
171.26 |
3000 |
259.67 |
4050 |
319.38 |
5100 |
361.78 |
| 950 |
75.80 |
2000 |
175.76 |
3050 |
262.64 |
4100 |
321.82 |
5150 |
362.30 |
| 1000 |
80.01 |
2050 |
180.58 |
3100 |
265.59 |
4150 |
323.87 |
5200 |
364.31 |
Technical Data
Technical Data for Typical Natural Gas Storage Cylinders and Assemblies
Number
of
Cylinders |
Gas
Volume
SCFgv1 |
Water
Volume
SCFwv2 |
Working
Pressure
PSIG |
Design
Pressure
PSIG |
Diameter
Inches
(D) |
Length
(L) |
Width
(W) |
Height
(H) |
Weight
LBS |
|
| DOT CYLINDERS |
| 1 |
460 |
1.55 |
3600 |
6000 |
9.25 |
51" |
40" |
61" |
190 |
 |
| 10 |
4600 |
15.5 |
3600 |
6000 |
9.25 |
51" |
40" |
61" |
2100 |
| 20 |
9200 |
31 |
3600 |
6000 |
9.25 |
51" |
40" |
61" |
4000 |
| ASME SINGLE CYLINDERS |
| 1 |
525 |
1.47 |
5000 |
5500 |
9.56 |
54" |
- |
- |
400 |
 |
| 1 |
785 |
2.19 |
5000 |
5500 |
11.65 |
56" |
- |
- |
435 |
| 1 |
830 |
2.33 |
5000 |
5500 |
11.65 |
59" |
- |
- |
460 |
| 1 |
945 |
2.65 |
5000 |
5500 |
11.65 |
66" |
- |
– |
575 |
| 1 |
5714 |
16.0 |
5000 |
5500 |
20 |
12'-1" |
30" |
27" |
4300 |
| 1 |
10030 |
28.1 |
5000 |
5500 |
20 |
19'-9" |
30" |
27" |
6500 |
| 1 |
12207 |
34.2 |
5000 |
5500 |
20 |
23'-7" |
30" |
27" |
7500 |
| ASME 3-PACK ASSEMBLIES |
| 3 |
11049 |
31.0 |
5000 |
5500 |
20 |
9'-0" |
48" |
4'- 4" |
8800 |
 |
| 3 |
17133 |
48.0 |
5000 |
5500 |
20 |
12'-1" |
27" |
7'- 4" |
12000 |
| 3 |
30090 |
84.3 |
5000 |
5500 |
20 |
19'-9" |
27" |
7'- 4" |
18500 |
| 3 |
36621 |
102.6 |
5000 |
5500 |
20 |
23'-7" |
27" |
7'- 4" |
22000 |
1. SCFgv = standard cubic feet gas volume. Referenced to 0.6 specific gravity, 70º F and working pressure.
2. SCFwv = standard cubic feet water volume, the internal volume of the cylinder(s).
Information in this chart is for reference only. Other storage systems are available.
Dimensions for ASME single cylinders and 3-pack assemblies do not include valves at each end of the cylinders except for the 11,049 scf capacity 3-pack assembly.
Consult BAUER to confirm your requirements for storage.
Cylinders for natural gas storage are available to meet the code requirements of either the Department of Transportation (D.O.T.) or the American Society of Mechanical Engineers (A.S.M.E.)
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