Table of Contents
Advertisement
7
Gas Piping
(continued)
For materials or conditions other than those listed
above, refer to National Fuel Gas Code, ANSI
Z223.1/NFPA 54 or Natural Gas and Propane
Installation Code, CAN/CSA B149.1, or size
system using standard engineering methods
acceptable to authority having jurisdiction.
Table 7-2: Maximum Capacity of Schedule 40 Black Pipe in CFH* (LP Gas) For Gas Pressures of 1/2 psi (3.4
kPa) or Less
Inlet Pressure 11.0 in wc (2.7 kPa); 0.3 in wc (0.07 kPa) Pressure Drop
Nominal
Inside
Pipe Size, in.
Diameter, 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
Inlet Pressure 11.0 in wc (2.7 kPa); 0.5 in wc (0.12 kPa) Pressure Drop
Nominal
Inside
Pipe Size, in.
Diameter, 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 7-3: Equivalent Lengths of Standard Pipe Fittings & Valves (ft.)
Nominal
Inside
Pipe Size,
Diameter,
in.
in.
½
0.622
¾
0.824
1
1.049
1¼
1.38
1½
1.61
2
2.067
2½
2.469
3
3.068
54
10
20
30
88
60
48
184
126
101
346
238
191
710
488
392
1064
732
588
2050
1409
1131
3267
2246
1803
5776
3970
3188
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
APEX
Installation, Operating, & Service Instructions
Table 7-4: Specific Gravity Correction Factors
Specific
Gravity
0.60
0.65
0.70
0.75
0.80
0.85
Length of Pipe, ft.
40
50
60
41
37
33
87
77
70
163
145
131
336
297
269
503
446
404
968
858
778
1543
1368
1239
2729
2418
2191
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
3597
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
Correction
Specific
Factor
Gravity
1.00
0.90
0.96
1.00
0.93
1.10
0.90
1.20
0.87
1.30
0.81
1.40
70
80
31
29
64
60
121
112
105
248
231
216
371
346
324
715
666
624
1140
1061
995
2016
1875
1760
70
80
40
38
85
79
159
148
139
327
304
285
490
456
427
943
877
823
1503
1399
1312
2658
2472
2320
Screwed Fittings
180 Close
90 Tee Flow
Return
Through
Bend
Run
3.5
1.6
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
106308-05 - 3/23
Correction
Factor
0.82
0.78
0.74
0.71
0.68
0.66
90
100
27
25
56
53
100
204
306
590
940
1662
90
100
35
33
74
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
