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3.3.1 Gas Pipe Sizing Tables (Referenced from 2012 National Fuel Gas Code)
These tables are for reference only. Please consult the gas pipe manufacturer for actual pipe capacities.
Maximum Natural Gas Delivery Capacity
In cubic feet (ft
) per hour (0.60 specific gravity; 0.5 in WC pressure drop). Contact your gas supplier for BTU/ft
3
ratings. Use 1,000 BTU/ft
3
Length (including fittings)
Pipe
10 ft
20 ft
Size
(3 m)
(6 m)
/
in
360
247
3
4
1 in
678
466
1
/
in 1,390
957
1
4
1
/
in 2,090
1,430
1
2
2 in
4,020
2,760
2
/
in 6,400
4,400
1
2
3 in
11,300
7,780
4 in
23,100
15,900
Maximum Liquefied Propane Delivery Capacity
In thousands of BTU/H (0.5 in WC pressure drop)
Length (including fittings)
Pipe
10 ft
20 ft
Size
(3 m)
(6 m)
/
in
291
200
1
2
/
in
608
418
3
4
1 in
1,150
787
1
/
in 2,350
1,620
1
4
1
/
in 3,520
2,420
1
2
2 in
6,790
4,660
22
Installing the Water Heater
for simplified calculations.
30 ft
40 ft
50 ft
(9 m)
(12 m)
(15 m)
199
170
151
374
320
284
768
657
583
1,150
985
873
2,220
1,900
1,680
3,530
3,020
2,680
6,250
5,350
4,740
12,700
10,900
9,660
30 ft
40 ft
50 ft
60 ft
(9 m)
(12 m)
(15 m)
(18 m)
160
137
122
110
336
287
255
231
632
541
480
434
1,300
1,110
985
892
1,940
1,660
1,480
1,340
3,750
3,210
2,840
2,570
60 ft
70 ft
80 ft
(18 m)
(21 m)
(24 m)
137
126
117
257
237
220
528
486
452
791
728
677
1,520
1,400
1,300
2,430
2,230
2,080
4,290
3,950
3,670
8,760
8,050
7,490
80 ft
100 ft
125 ft
(24 m)
(30 m)
(38 m)
101
94
89
212
197
185
400
372
349
821
763
716
1,230
1,140
1,070
2,370
2,200
2,070
90 ft
100 ft
125 ft
(27 m)
(30 m)
(38 m)
110
104
92
207
195
173
424
400
355
635
600
532
1,220
1,160
1,020
1,950
1,840
1,630
3,450
3,260
2,890
7,030
6,640
5,890
150 ft
175 ft
200 ft
250 ft
(45 m)
(53 m)
(60 m)
(76 m)
84
74
67
62
175
155
140
129
330
292
265
243
677
600
543
500
1,010
899
814
749
1,950
1,730
1,570
1,440
3
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