Pipe Sizing Chart For Natural Gas
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1Pipe Sizing Chart for Natural Gas
This chart below is based on gas pressure in the range 0‐0.5 psi, specific gravity
of 0.6, and pressure loss of 0.5”WC. Numbers are for straight 40 pipe; fittings
further reduce capacity. For example, in 1” size, an elbow is equivalent to
about 2.6 feet of pipe, a tee is equivalent to about 5.2 feet of pipe
Maximum capacity of pipe in cubic feet/hr of natural gas
(Multiply values by 1000 to get nominal BTU/hr capacity)
Length of
Iron pipe size
pipe (ft)
3/4”
1”
1‐1/4”
1‐1/2”
2”
10
360
680
1400
2100
3950
20
250
465
950
1460
2750
30
200
375
770
1180
2200
40
170
320
660
990
1900
50
151
285
580
900
1680
60
138
260
530
810
1520
70
125
240
490
750
1400
80
118
220
460
690
1300
90
110
205
430
650
1220
100
103
195
400
620
1150
150
84
160
325
500
950
200
72
135
280
430
800
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