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Arctic Installation and Operation Manual
P/N 105641-01
Appendix A Sizing Gas Piping
Design the gas piping system to provide an adequate gas supply to the boiler. Refer to
Table 6 for minimum and maximum gas supply pressures and boiler capacities. Also consider
existing and expected future gas utilizing equipment (i.e., water heater, cooling equipment). Refer
to Error! Reference source not found. for maximum capacity of schedule 40 pipe. Table 20 lists
equivalent pipe length for standard fittings. Given the specific gravity of gas at the boiler's location,
a correction factor can be found on Table 21 and multiplied by the "Capacity in Cubic Feet of Gas
Per Hour" on Error! Reference source not found.. For gas piping material other than schedule 40
ipes, refer to the National Fuel Gas Code, NFPA 54/ANZI Z223.1 and/or CAN/CGA B149 Installation
codes. Use methods and materials in accordance with Local Codes and requirements of gas
supplier. In the absence of such requirement follow National Fuel Gas Codes, NFPA /ANSI Z 223.1
and/or CAN/CGA B149 Installation Codes.
Pipe
Pipe Size (npt)
Length in
Equivalent
¾
Feet
10
273
20
188
30
151
40
129
50
114
60
104
70
95
80
89
90
83
100
79
125
70
150
63
175
58
200
54
Based on gas pressures less than 2 psig and a pressure drop of 3.0 iwc and 0.6 specific gravity.
46
Thermal Solutions, 1175 Manheim Pike, Lancaster, PA 17601 Web:
Phone: 717-239-7642 Fax: 877-501-5212 Email:
Table 19: Maximum Gas Capacity Of Schedule 40 Pipe
1
1-1/4
514
1060
353
726
284
583
243
499
215
442
195
400
179
368
167
343
157
322
148
304
131
269
119
244
109
224
102
209
1-1/2
2
1580
3050
1090
2090
873
1680
747
1440
662
1280
600
1160
552
1060
514
989
482
928
455
877
403
777
366
704
336
648
313
602
sales@thermalsolutions.com
Form: 2435-3
Revision: 10
Date: 12-1-2018
2-1/2
3
4860
8580
3340
5900
2680
4740
2290
4050
2030
3590
1840
3260
1690
3000
1580
2790
1480
2610
1400
2470
1240
2190
1120
1980
1030
1820
960
1700
www.thermalsolutions.com
4
17500
12000
9660
8270
7330
6640
6110
5680
5330
5040
4460
4050
3720
3460
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