MN702GE 060320
– 14 –
NATURAL GAS
Capacities in
Cubic feet per hour
for Schedule 40 metal pipe
Pipe size
(inches)
Total length of gas piping,
from meter to burner connection (feet)
20
40
60
80
100
Natural gas @ .60 specific gravity, pressure drop 0.3 in. w.c.
(note 1)
1¼
730
500
400
350
305
1½
1,100
760
610
530
460
2
2,100
1,450
1,150
990
870
2½
3,300
2,300
1,850
1,600
1,400
Natural gas @ .60 specific gravity, pressure drop 0.5 in. w.c.
(note 1)
1¼
950
660
530
460
400
1½
1,460
990
810
690
620
2
2,750
1,900
1,520
1,300
1,150
2½
4,350
3,000
2,400
2,050
1,850
Note 1
For natural gas with specific gravity other than 0.60,
consult National Fuel Gas Code for correction factor.
PROPANE GAS
Capacities in
Btuh
for
Schedule 40 metal pipe
Propane gas @ 1.5 specific gravity, pressure drop 1 psi
½
1,839
1,264
1,015
869
770
¾
3,845
2,643
2,122
1,816
1,610
1
7,243
4.978
3,998
3,422
3,033
Propane gas @ 1.5 specific gravity, pressure drop 0.5 in. w.c.
1
787
541
434
372
330
1¼
1,616
1,111
892
677
543
1½
2,422
1.664
1,337
1,114
1,014
Table 3
Capacities of black iron pipe, cubic feet gas/hour
Figure 6
Gas train pressure drop
3. Install gas piping
(continued)