Equivalent Lengths Of Standard Pipe Fittings & Valves; Recommended Gas Piping - Burnham Revolution Installation, Operating And Service Instructions

Table : Maximum Capacity of Schedule 40 Pipe in CFH* For Gas Pressures of 0.5 psig or Less
Length
[Feet]
½
132
10
20 92
30 73
63
40
50 56
50
60
70
46
43
80
90 40
38
100
* 1 CFH of Natural Gas is approximately equal to 1 MBH; 1 CFH of LP is approximately equal to 2.5 MBH;
contact your gas supplier for the actual heating value of your gas.
WARNING
Failure to use proper thread compounds on all
gas connectors may result in leaks of flammable
gas.
WARNING
Gas supply to boiler and system must be
absolutely shut off prior to installing or servicing
boiler gas piping.
1. Use methods and materials in accordance with local
plumbing codes and requirements of gas supplier. In
absence of such requirements, follow National Fuel
Gas Code, NFPA 54/ANSI Z223.1.
2. Use thread (joint) compounds (pipe dope) resistant
to action of liquefied petroleum gas.
Table 8: Equivalent Lengths of Standard Pipe Fittings & Valves
I.D.
Pipe
Gate
Size Inches
½" 06.22 0.35
¾" 0.824 0.44
1" 1.049 0.56
1¼" 1.380 0.74
0.3 Inch w.c. Pressure Drop
¾ 1
278 520
350
190
152 285
130 245
115 215
105 195
96 180
170
90
84 160
79 150
VALVES FULLY OPEN
Globe
Angle
18.6 9.3
23.1 11.5
29.4 14.7
38.6 19.3
1¼ ½
1,050 175
730 120
590 97
500 82
73
440
400 66
370
61
350 57
320 53
305 50
3. Install sediment trap, ground-joint union and manual
shut-off valve upstream of boiler gas control valve
and outside jacket. See Figure 30.
Figure 30: Recommended Gas Piping
90°
Swing
Check Elbow Elbow
4.3 1.6
5.3 2.1
6.8 2.6
8.9 3.5
0.5 Inch w.c. Pressure Drop
¾ 1
360
680
250 465
200 375
170 320
151 285
138 260
125 240
220
118
205
110
103 195
45° 90° Tee, Flow
Through Run
0.78 1.0
0.97 1.4
1.23 1.8
1.60 2.3
1¼
1,400
950
770
660
580
530
490
460
430
400
90° Tee, Flow
Through Branch
3.1
4.1
5.3
6.9
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