Wayne EHG - Page 43

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Pipe Sizing Chart for Natural Gas
The following chart is based on 0-0.5 psi inlet pressure, specific gravity of 0.6, and a pressure loss of 0.5” w.c..
Numbers are for straight schedule 40 metal pipe.
Maximum Capacity in Cubic Feet of Gas per Hour
Length of
Pipe (ft)
3/4" 1" 1 1/4" 1 1/2" 2"
10
360,000 680,000 1,400,000 2,100,000 3,950,000
20
250,000 465,000 950,000 1,460,000 2,750,000
30
200,000 375,000 770,000 1,180,000 2,200,000
40
170,000 320,000 660,000 990,000 1,900,000
50
151,000 285,000 580,000 900,000 1,680,000
60
138,000 260,000 530,000 810,000 1,520,000
70
125,000 240,000 490,000 750,000 1,400,000
80
118,000 220,000 460,000 690,000 1,300,000
90
110,000 205,000 430,000 650,000 1,220,000
100
103,000 195,000 400,000 620,000 1,150,000
150
84,000 160,000 325,000 500,000 950,000
200
72,000 135,000 280,000 430,000 800,000
Pipe Sizing Chart for Liquid Propane
The following chart is based on 10 psi inlet pressure and a pressure drop of 1 psi.
Numbers are for straight schedule 40 metal pipe.
Maximum Capacity in Btu per Hour
Length of
Pipe (ft)
1/2" 3/4"
10
3,339,000 6,982,000
20
2,295,000 4,799,000
30
1,843,000 3,835,000
40
1,570,000 3,283,000
50
1,391,000 2,909,000
60
1,261,000 2,636,000
70
1,160,000 2,423,000
80
1,079,000 2,256,000
90
1,012,000 2,117,000
100
956,000 2,000,000
150
768,000 1,606,000
200
657,000 1,374,000
250
582,000 1,218,000
300
528,000 1,104,000
350
486,000 1,015,000
400
452,000 945,000
450
424,000 886,000
500
400,000 847,000