Table of Contents
Advertisement
XII. Gas Piping (continued)
Maximum capacity of schedule 40 black pipe in CFH*
Table 31:
Natural Gas, Inlet Pressure 14.0 in wc (3.4 kPa)or less; 0.5 in wc (0.12 kPa) Pressure Drop
Nominal
Inside
Pipe Size
Diameter
(In)
(In)
½
0.622
¾
0.824
1
1.049
1¼
1.380
1½
1.610
2
2.067
2½
2.469
3
3.068
*1 CFH of Natural Gas is approximately equal to 1 MBH; contact your gas suppliers for the actual heating value of your gas.
Propane Gas, Inlet Pressure 11.0 in wc (2.7 kPa); 0.5 in wc (0.12 kPa) Pressure Drop
Nominal
Inside
Pipe Size
Diameter
(In)
(In)
½
0.622
¾
0.824
1
1.049
1¼
1.380
1½
1.610
2
2.067
2½
2.469
3
3.068
*1 CFH of LP gas is approximately equal to 2.5 MBH; contact your gas supplier for the actual heating value of your gas.
Table 32:
Equivalent Lengths of Standard Pipe Fittings & Valves (ft)
Inside
Nominal
Diameter
Pipe Size
(in)
0.622
0.824
½
1.049
¾
1.38
1
1.61
1¼
2.067
1½
2.469
2
3.068
2½
3
20
30
10
172
118
95
360
247
199
678
466
374
1390
957
768
2090
1430
1150
4020
2760
2220
6400
4400
3530
11300
7780
6250
10
20
30
116
80
64
242
166
134
456
314
252
937
644
517
1403
964
775
2703
1858
1492
4308
2961
2377
7615
5234
4203
Valves (Screwed) - Fully Open
Gate
Globe Angle
0.4
17.3
8.7
0.5
22.9
11.4
0.6
29.1
14.6
0.8
38.3
19.1
0.9
44.7
22.4
1.2
57.4
28.7
1.4
68.5
34.3
1.8
85.2
42.6
Length of Pipe (Ft)
40
50
60
81
72
65
170
151
137
320
284
257
657
583
528
985
873
791
1900
1680
1520
3020
2680
2430
5350
4740
4290
Length of Pipe (Ft)
40
50
60
55
48
44
114
101
92
215
191
173
442
392
355
663
588
532
1277
1131
1025
2035
1803
1634
3567
3188
2889
Swing
45°
90°
Check
Elbow
Elbow
4.3
0.7
1.6
5.7
1.0
2.1
7.3
1.2
2.6
9.6
1.6
3.5
11.2
1.9
4.0
14.4
2.4
5.2
17.1
2.9
6.2
21.3
3.6
7.7
60
70
80
90
60
56
52
126
117
110
237
220
207
486
452
424
728
677
635
1400
1300
1220
2230
2080
1950
3950
3674
3450
70
80
90
40
38
35
85
79
74
159
148
139
327
304
285
490
456
427
943
877
823
1503
1399
1312
2658
2472
2320
Screwed Fittings
90 Tee
180 Close
Flow
Return
Through
Bend
3.5
1.6
Run
4.6
2.1
5.8
2.6
7.7
3.5
9.0
4.0
11.5
5.2
13.7
6.2
17.1
7.7
100
50
104
195
400
600
1160
1840
3260
100
33
70
131
269
404
778
1239
2191
90 Tee, Flow
Through
Branch
3.1
4.1
5.2
6.9
8.0
10.3
12.3
15.3
Advertisement
Table of Contents
