Table 3LP - 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 0.5 inches wc, CFH.

Length of
Tube, feet		Outside Diameter of Tube, inches
3/81/25/83/47/81 1/81 3/8
10 16 33 68 119 169 361 649
20 11 23 47 82 116 248 446
30 9 18 38 66 93 199 358
40 8 16 32 56 80 170 307
50 7 14 29 50 71 151 272
60 6 13 26 45 64 137 246
70 6 12 24 42 59 126 227
80 5 11 22 39 55 117 211
90 5 10 21 36 51 110 198
100 5 10 20 34 49 104 187
125 4 9 17 30 43 92 166
150 4 8 16 27 39 83 150
175 3 7 14 25 36 77 138
200 3 7 13 24 33 71 128
250 3 6 12 21 30 63 114

(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)