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Copyright 2015 by Southern Pride Distributing, LLC Volume 1
GAS PIPING INSTRUCTIONS
Pipe Sizing Chart for Natural Gas (0-0.5 psi) with Straight Schedule 40 Metal Pipe
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.
Pipe Sizing Chart for Liquid Propane (11” w.c.) with Copper Tubing
The following chart is based on 11” w.c. inlet pressure and a pressure drop of 0.5” w.c.
NOTE:
Copper tubing shall comply with standard type K or L of ASTM B 88 or STM B 280.
Maximum Capacity of Pipe Size in Btu per Hour
Pipe Size
1/2”
3/4”
1”
1 1/4”
1 1/2”
Pipe Length
(ft)
10
175,000 360,000 680,000 1,400,000
2,100,000
20
120,000 250,000 465,000 950,000 1,460,000
30
97,000 200,000 375,000 770,000 1,180,000
40
82,000 170,000 320,000 660,000 990,000
50
73,000 151,000 285,000 580,000 900,000
60
66,000 138,000 260,000 530,000 810,000
70
61,000 125,000 240,000 490,000 750,000
80
57,000 118,000 220,000 460,000 690,000
90
53,000 110,000 205,000 430,000 650,000
100
50,000 103,000 195,000 400,000 620,000
150
40,000 84,000 160,000 325,000 500,000
200
35,000 72,000 135,000 280,000 430,000
Maximum Capacity in Btu/hr
Maximum Capacity of Tube Size in Btu per Hour
Pipe
Size
1/2” 5/8” 3/4” 7/8”
Pipe Length
(ft)
Maximum Capacity in Btu/hr
10
110,000 206,000 348,000 536,000
20
76,000 141,000 239,000 368,000
30
61,000 114,000 192,000 296,000
40
52,000 97,000 164,000
253,000
50
46,000 86,000 146,000
224,000
60
42,000 78,000 132,000
203,000
70
38,000 71,000 120,000
185,000
80
36,000 67,000 113,000
174,000
90
33,000 62,000 105,000
161,000
100
32,000 59,000 100,000
154,000
