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Maximum Delivery Capacity of Cubic Feet of Gas per Hour of IPS Pipe Carrying Natural Gas of 0.60 Specific Gravity
Based on Pressure Drop of 0.5" WC
Based on Energy Content of 1,000 BTU/Cubic Ft.: 710 (T-M32) requires 240 Cubic Ft./hr.
Pipe Size
Diameter
10'
¾"
363
1"
684
1 ¼"
1,404
1 ½"
2,103
2"
4,050
6,455
2 ½"
3"
11,412 7,843 6,299 5,391 4,778 4,329 3,983 3,705 3,476 3,284 2,910 2,637 2,257
Maximum Capacity of Propane (LP) Gas Based on 11" WC supply pressure at a 1.0" WC pressure drop
Pipe Size
Diameter
10'
20'
¾"
567
393
1"
1,071
732
1 ¼"
2,205
1,496
1 ½"
3,307
2,299
2"
6,221
4,331
Gas Sizing Example
Water
Heater
240,000BTU
10' Length
3/4" Pipe Size
5' Length
A
1-1/4" Pipe Size
10' Length
5' Length
1" Pipe Size
1-1/4" Pipe Size
Gas Meter
Natural Gas Supply Piping
20'
30'
40'
249
200
171
470
377
323
965
775
663
1,445 1,161
993
2,784 2,235 1,913 1,696 1,536 1,413 1,315 1,234 1,165 1,033
4,437 3,563 3,049 2,703 2,449 2,253 2,096 1,966 1,857 1,646 1,492 1,277
Propane (LP) Gas Supply Piping
30'
40'
50'
315
267
237
590
504
448
1,212
1,039
913
1,858
1,559
1,417
3,465
2,992
2,646
(Natural Gas)
Dryer
35,000BTU
10' Length
15' Length
1/2" Pipe Size
B
3/4" Pipe Size
10' Length
1/2" Pipe Size
3/4" Pipe Size
Range
Furnace
65,000BTU
120,000BTU
Length
50'
60'
70'
80'
152
138
127
118
286
259
239
222
588
532
490
456
880
798
734
683
Length
60'
70'
80'
217
196
185
409
378
346
834
771
724
1,275
1,181
1,086
2,394
2,205
2,047
Based on Energy Content of 1,000BTU/Cubic Ft:
Divide each appliance's BTU requirement by 1,000BTU to get
the appliances Cubic Ft. requirement.
Take into account the distance the appliance is from the gas
meter, look in the above gas chart to properly size the line.
For sections of the gas line supplying gas to more than one
appliance (Ex: Point A to Point B), add up the cubic ft.
requirements of the appliances that are being supplied by that
section, and size to the farthest appliance.
For Example: The section from A to B supplies gas to the
15' Length
furnace, range, and dryer. Adding up the BTU requirements and
dividing by 1,000 yields a cubic ft. requirement of 220 cubic ft. of
gas. The farthest appliance is the range, which is 50 ft. away
from the meter. Looking at the above chart, and under the
column of 50ft., Section A to B needs to be 1" in order to supply
220 cubic ft.
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Unit: Cubic Feet per Hour
90'
100'
125'
111
104
93
208
197
174
428
404
358
641
605
536
Unit: kBTU per Hour
90'
100'
125'
173
162
146
322
307
275
677
630
567
1,023
976
866
1,921
1,811
1,606
1,496
150'
200'
84
72
158
135
324
278
486
416
936
801
150'
200'
132
112
252
213
511
440
787
675
1,260
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