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Nordyne SERIES M1B Manuel D’Utilisation

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CAPACITY OF BLACK IRON GAS PIPE (CU. FT. PER HOUR) 
FOR NATURAL GAS (SPECIFIC GRAVITY - 0.60)
NOMINAL BLACK IRON 
PIPE DIAMETER (IN.)
LENGTH OF PIPE RUN (FT)
10
20
30
40
50
60
70
80
½  
130
90
75
65
55
50
45
40
¾  
280
190
150
130
115
105
95
90
1
520
350
285
245
215
195
180
170
1
 ¼  
1,050
730
590
500
440
400
370
350
1
 ½  
1,600
1,100
890
760
670
610
NOTE: The cubic feet per hour listed in the table above must be greater than the cubic feet 
per hour of gas fl ow required by the furnace. To determine the cubic feet per hour of gas fl ow 
required by the furnace, divide the input rate of the furnace by the heating value (from gas 
supplier) of the gas. 
Cubic Feet Per Hour Required =
Input To Furnace (Btu/hr)
Heating Value of Gas (Btu/Cu. Ft.)
Table 14. Capacity of Black Iron Gas Pipe (cu. ft. per hour)
for Natural Gas w/ Specifi c Gravity = 0.60
GAS INFORMATION
Table 13. Gas Flow Rates (Cubic Feet per Hour)
GAS FLOW RATES
TIME FOR
ONE REVOLUTION
(SECONDS)
CUBIC FEET PER 
REVOLUTION
OF GAS METER
1
5
10
10
360
1,800
3,600
12
300
1,500
3,000
14
257
12,86
2,571
16
225
1,125
2,250
18
200
1,000
2,000
20
180
900
1,800
22
164
818
1,636
24
150
750
1,500
26
138
692
1,385
28
129
643
1,286
30
120
600
1,200
32
113
563
1,125
34
106
529
1,059
36
100
500
1,000
38
95
474
947
40
90
450
900
42
86
429
857
44
82
409
818
46
78
391
783
48
75
375
750
50
72
360
720
52
69
346
692
54
67
333
667
56
64
321
643
58
62
310
621
60
60
300
600
62
58
290
581
64
56
281
563
GAS FLOW RATES
TIME FOR
ONE REVOLUTION
(SECONDS)
CUBIC FEET PER 
REVOLUTION
OF GAS METER
1
5
10
66
55
273
545
68
53
265
529
70
51
257
514
72
50
250
500
74
49
243
486
76
47
237
474
78
46
231
462
80
45
225
450
82
44
220
439
84
43
214
429
86
42
209
419
88
41
205
409
90
40
200
400
92
39
196
391
94
38
191
383
96
38
188
375
98
37
184
367
100
36
180
360
102
35
176
353
104
35
173
346
106
34
170
340
108
33
167
333
110
33
164
327
112
32
161
321
114
32
158
316
116
31
155
310
118
31
153
305
120
30
150
300