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Gas Pipe Sizing Chart For Gas Logs
How to read chart: Numbers across top of chart from 10 to 200 is length of pipe run 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 run of pipe.
| Natural Gas | |||||||||||||||
| Iron Pipe |
Length Of Run In Feet |
||||||||||||||
| Nominal Iron Pipe in Inches | Actual Inside Diameter | 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 | |||||||||||||||
| Outside Diameter In Inches | Actual Inside Diameter | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 125 | 150 | 175 | 200 |
| 3/8" | .250" or 1/4" | 20 | 14 | 11 | 10 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 |
| 1/2" | .375" or 3/8" | 42 | 29 | 23 | 20 | 18 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| 5/8" | .500" or 1/2" | 88 | 59 | 47 | 40 | 36 | 33 | 30 | 28 | 26 | 25 | 22 | 20 | 18 | 17 |
| 3/4" | .625" or 5/8" | 150 | 103 | 83 | 71 | 63 | 57 | 52 | 49 | 46 | 43 | 38 | 35 | 32 | 30 |
| 7/8" | .750" or 3/4" | 212 | 146 | 117 | 100 | 89 | 81 | 74 | 69 | 65 | 61 | 54 | 49 | 45 | 42 |
| L.P. Gas (Propane) | |||||||||||||||
| Iron Pipe |
Length Of Run In Feet |
||||||||||||||
| Nominal Iron Pipe Size In Inches | Actual Inside Diameter | 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 | |||||||||||||||
| Outside Diameter In Inches | Actual Inside Diameter | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 125 | 150 | 175 | 200 |
| 3/8" | .250" or 1/4" | 39 | 26 | 21 | 19 | - | - | - | - | - | - | - | - | - | - |
| 1/2" | .375" or 3/8" | 92 | 62 | 50 | 41 | 37 | 35 | 31 | 29 | 27 | 26 | - | - | - | - |
| 5/8" | .500" or 1/2" | 199 | 131 | 107 | 90 | 79 | 72 | 67 | 62 | 59 | 55 | - | - | - | - |
| 3/4" | .625" or 5/8" | 329 | 216 | 181 | 145 | 131 | 121 | 112 | 104 | 95 | 90 | - | - | - | - |
| 7/8" | .750" or 3/4" | 501 | 346 | 277 | 233 | 198 | 187 | 164 | 155 | 146 | 138 | - | - | - | - |
No part of this chart may be reproduced without written permission.
BTU inputs of gas logs and gas appliances
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