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COMPRESSIBILITY OF GASSES AT 70°F
 PSIG  Water Vol. ACF Helium SCF Hydrogen SCF Nitrogen SCF Air SCF Argon SCF Oxygen SCF Natural Gas SCF
100 1 7.78 7.77 7.81 7.81 7.84 7.84 7.92
200 1 14.51 14.49 14.65 14.65 14.74 14.74 14.82
500 1 34.45 34.29 35.20 35.36 35.78 35.79 37.82
1,000 1 66.37 66.26 69.30 70.29 71.79 71.83 80.01
1,100 1 72.64 72.50 76.08 77.21 79.10 79.15 89.24
1,200 1 78.86 78.66 82.82 84.14 86.44 86.52 98.40
1,300 1 85.03 84.73 89.49 91.07 93.79 93.89 107.78
1,400 1 91.16 90.83 96.14 98.40 101.20 101.27 117.89
1,500 1 98.12 96.84 102.74 104.77 108.50 108.66 127.24
1,600 1 104.28 102.83 109.29 111.37 115.90 116.09 137.34
1,700 1 110.40 108.75 115.78 117.97 123.30 123.50 147.13
1,800 1 116.49 114.66 122.25 124.57 130.70 130.88 156.31
1,900 1 122.54 120.49 128.66 131.17 138.00 138.27 166.61
2,000 1 128.55 126.28 134.90 137.77 145.30 145.68 175.76
2,100 1 134.53 132.05 140.91 144.36 152.60 153.04 185.67
2,200 1 140.47 137.71 147.33 150.91 159.90 160.34 194.45
2,300 1 146.37 143.37 153.46 156.97 167.10 167.64 203.23
2,400 1 152.25 148.97 159.48 163.04 174.30 174.92 213.39
2,500 1 158.08 154.48 165.39 169.11 181.50 182.04 221.36
2,600 1 163.89 159.96 171.24 175.17 188.60 189.18 229.57
2,700 1 169.66 165.43 177.04 181.24 195.60 196.27 236.82
2,800 1 179.40 170.84 182.69 187.30 202.50 203.26 244.92
2,900 1 181.10 176.20 188.32 193.37 209.40 210.24 252.33
3,000 1 186.78 181.49 193.82 198.96 216.30 217.09 259.67
3,100 1 192.42 186.85 199.14 204.40 223.00 223.86 265.59
3,200 1 198.03 192.07 204.61 209.83 229.70 230.56 271.73
3,300 1 203.60 197.31 209.86 215.27 236.30 237.18 278.46
3,400 1 209.15 202.50 215.05 220.70 242.80 243.65 284.75
3,500 1 214.66 207.64 220.26 226.14 249.20 250.10 290.24
3,600 1 220.15 212.46 225.18 231.58 255.50 256.41 296.34
3,700 1 225.60 217.70 230.10 236.87 261.80 262.63 300.92
3,800 1 231.03 222.69 234.91 241.69 267.90 268.69 306.46
3,900 1 236.42 227.71 239.70 246.51 274.00 274.74 311.92
4,000 1 241.79 232.63 244.39 251.34 279.90 280.66 316.55
4,100 1 247.13 237.50 249.01 256.16 285.80 286.35 321.82
4,200 1 252.44 242.34 253.51 260.98 291.60 292.12 325.90
4,300 1 257.52 247.13 257.92 265.81 297.30 297.68 329.88
4,400 1 262.97 251.84 262.38 270.51 302.80 303.20 334.52
4,500 1 268.19 256.60 266.60 274.85 308.30 308.67 338.33
4,600 1 273.39 261.28 270.86 279.20 313.70 314.08 342.43
4,700 1 278.55 265.94 275.07 283.54 319.10 319.36 345.71
4,800 1 283.70 270.53 279.11 287.89 324.30 324.10 350.39
4,900 1 288.81 275.08 282.97 292.23 329.40 328.96 353.14
5,000 1 293.90 279.62 286.67 296.57 334.40 333.83 356.93
5,100 1 298.96 284.17 290.43 300.92 339.40 338.69 361.78
5,200 1 304.00 288.64 294.39 304.84 344.30 343.56 364.71
5,300 1 309.01 293.03 298.18 308.57 349.00 348.42 367.15
5,400 1 313.99 297.41 301.92 312.30 353.70 353.29 370.30
5,500 1 318.95 301.83 305.80 316.03 358.40 358.15 373.38
5,600 1 323.88 306.17 309.65 319.77 362.90 363.02 374.56
5,700 1 328.80 309.15 313.26 323.50 367.40 367.88 377.53
5,800 1 333.68 313.63 316.50 327.23 371.70 372.75 380.45
5,900 1 338.54 317.95 319.76 330.80 376.00 377.22 382.58
6,000 1 343.37 321.96 322.77 334.06 380.30 380.96 386.11
7,000 1 390.44 394.90 352.88 365.19 418.90    
9,000 1 478.20 437.50 403.63 417.19 480.40    
10,000 1 517.26 470.65 422.80 438.60 505.40    
15,000 1 701.91   504.17 517.24      
20,000 1 856.14   547.88 571.30      
 CCH Equipment provides this information as reference material only.  all numbers should be checked before being used for any critical engineering.