Table 4LP - Maximum Capacity* for the Flow of Undiluted Liquefied Petroleum (LP) Gases through Copper Tube in a Low Pressure System of Less than 14 inches wc and Pressure Drop of 1.0 inches wc, CFH.**

Length of Tube, feetOutside Diameter of Tube, inches
3/81/25/83/47/81 1/81 3/8
10 24 49 99 173 246 525 945
20 16 33 68 119 169 361 649
30 13 27 55 96 136 290 521
40 11 23 47 82 116 248 446
50 10 20 41 72 103 220 395
60 9 18 38 66 93 199 358
70 8 17 35 60 86 183 330
80 8 16 32 56 80 170 307
90 7 15 30 53 75 160 288
100 7 14 29 50 71 151 272
125 6 12 25 44 63 134 241
150 5 11 23 40 57 121 218
175 5 10 21 37 52 112 201
200 5 10 20 34 49 104 187
250 4 9 17 30 43 92 166

(Capacities in the table are based on the properties of commercial propane gas with a specific gravity of 1.52. Physical properties of the gas are based on those properties given in the Gas Processors Suppliers Association Engineering Data Book, Eleventh Edition)