Gas line sizing chart for Natural Gas & LP Gas Logs and Fireplaces

The numbers across the top of this chart from 10 to 100 are the length of pipe run in feet.
The numbers up and down the left side are the gas pipe diameter in inches.
The numbers inside the table are the maximum BTU's in thousands for the run of pipe.
Please size your gas pipe for the BTU input of each log or fireplace shown on this web site.
Proper gas pipe sizing will prevent inadequate gas pressure that could result in smell, eye burn, and sooting incidents. 
  
Please refer to the Owners Manual on all fireplaces for BTU input or speak with
one of our technical staff for help in reading this chart and determining pipe size for your individual application.
 
 
L.P. Gas (Propane or Bottle Gas)
Black Iron Pipe
Black Iron Pipe Size    
In Inches		 Actual Inside Diameter
 		 10 20 30 40 50 60 70 80 90 100
1/2" .622" 275 189 152 129 114 103 96 89 83 78
3/4" .824" 587 393 315 267 237 217 196 185 173 162
Copper Tubing
Outside Diameter
In Inches		 Actual Inside Diameter
 		 10 20 30 40 50 60 70 80 90 100
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
Natural Gas (City Gas or Metered)
Black Iron Pipe
Black Iron Pipe
In Inches		 Actual Inside Diameter
 		 10 20 30 40 50 60 70 80 90 100
1/4" .364" 43 29 24 20 18 16 15 14 13 12
3/8" .493" 95 65 52 45 40 36 33 31 29 27
1/2" .622" 175 120 97 82 73 66 61 57 53 50
3/4" .824" 360 250 200 170 151 138 125 118 110 103
Copper Tubing
Outside Diameter
In Inches		 Actual Inside Diameter
 		 10 20 30 40 50 60 70 80 90 100
3/8" 1/4" 20 14 11 10 9 8 7 7 6 6
1/2" 3/8" 42 29 23 20 18 16 15 14 13 12
5/8" 1/2" 88 59 47 40 36 33 30 28 26 25
3/4" 5/8" 150 103 83 71 63 57 52 49 46 43