Gas Line Sizing Information from FireLogs.com

How to read chart:  Numbers across top of chart from 10 to 200 is length of gas line in feet.
                               Numbers up and down on left side is the pipe diameter in inches.
                               Numbers inside the table is the maximum BTU in thousands for
                                       the given length of gas line.
                                I.D. = Inside Diameter
                                O.D. = Outside Diameter
 

Iron Pipe - Natural Gas

Size

Length Of Gas Line In Feet

I.D.

I.D.

 10 20 30 40 50 60 70 80 90 100 125 150 175 200
1/4" .364" 43 29 24 20 18 16 15 14 13 12 11 10 9 9
3/8" .493" 95 65 52 45 40 36 33 31 29 27 24 22 20 19
1/2" .622" 175 120 97 82 73 66 61 57 53 50 44 40 37 35
3/4" .824" 360 250 200 170 151 138 125 118 110 103 93 84 77 72

Copper Tubing - Natural Gas

O.D.

I.D.

 10 20 30 40 50 60 70 80 90 100 125 150 175 200
3/8" 1/4" 20 14 11 10 9 8 7 7 6 6 5 5 4 4
1/2" 3/8" 42 29 23 20 18 16 15 14 13 12 11 10 9 8
5/8" 1/2" 88 59 47 40 36 33 30 28 26 25 22 20 18 17
3/4" 5/8" 150 103 83 71 63 57 52 49 46 43 38 35 32 30
7/8" 3/4" 212 146 117 100 89 81 74 69 65 61 54 49 45 42

Iron Pipe - Propane (LP) Gas

Size

Length Of Gas Line In Feet

I.D.

I.D.

 10 20 30 40 50 60 70 80 90 100 125 150 175 200
1/2" .622" 275 189 152 129 114 103 96 89 83 78 69 63 - -
3/4" .824" 587 393 315 267 237 217 196 185 173 162 146 132 - -

Copper Tubing - propane (LP) Gas

O.D.

I.D.

 10 20 30 40 50 60 70 80 90 100 125 150 175 200
3/8" 1/4" 39 26 21 19 - - - - - - - - - -
1/2" 3/8" 92 62 50 41 37 35 31 29 27 26 - - - -
5/8" 1/2" 199 131 107 90 79 72 67 62 59 55 - - - -
3/4" 5/8" 329 216 181 145 131 121 112 104 95 90 - - - -
7/8" 3/4" 501 346 277 233 198 187 164 155 146 138 - - - -