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Natural Gas Piping
The table below should be used to size the natural gas piping to the appliance. The approximate
energy content of natural gas is 1,000 BTU / cu. Ft:
Nominal
Equivalent Pipe
Internal
Length
Iron Pipe
Diameter
Size
(Inches)
(Inches)
90 o Ell
(Feet)
2
2.067
2- 1/2
2.469
3
3.068
4
4.026
Propane Gas Piping
The table below should be used to size the propane gas piping to the appliance. The approximate
energy content of propane gas is 2,500 BTU / cu. Ft:
Nominal
Equivalent Pipe
Internal
Iron Pipe
Length
Diameter
Size
(Inches)
(Inches)
90 o Ell
(Feet)
1- 1/2
1.610
2
2.067
2- 1/2
2.469
Pressure Testing the Gas Piping
The appliance and all gas piping connections should be pressure-tested and must be checked for leaks
before being placed into service. The appliance must be disconnected at the manual shut-off valve
(located at the end of the supplied gas train) from the gas supply piping during any pressure testing of
the system at pressures in excess of 0.0723 psig (2" W.C.). Perform the pressure test with compressed
air or inert gas if possible.
Some leak test methods, including the use of soap and water, may cause corrosion of the carbon steel
gas pipe fittings. If using soap and water or a similar leak test method, make sure to clean off all
moisture from the gas pipe fittings prior to placing the appliance into service.
Revised: June 2, 2017
Released: June 2, 2017
Pipe Capacity for Natural Gas
Maximum Capacity in Cubic Feet of Natural Gas Per Hour
Pressure Drop of 0.5" W.C.
Equivalent Length of Pipe (in feet)
Tee
(Feet)
5.17
10.3
6.16
12.3
7.67
15.3
10.1
20.2
15800
Pipe Capacity for Propane Gas
Maximum Capacity in MBH Propane Gas
Pressure Drop of 0.5" W.C.
Equivalent Length of Pipe (in feet)
Tee
(Feet)
4.02
8.04
5.17
10.3
6.16
12.3
HARSCO Industrial, Patterson-Kelley 2017
All Rights Reserved.
20
40
60
2750
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4350
3000
2400
7700
5300
4300
10900
8800
10
20
40
2850
1960
1345
5490
3770
2590
8740
6010
4130
®
P-K SONIC
Gas Fired Boiler
Technical Service 1.877.728.5351
80
100
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-
2050
1850
3700
3250
7500
6700
80
150
-
-
1780
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2840
2020
1004905978 P-K SONIC NURO Installation and
Owners Manual (Rev F Jun-2017).docx
150
200
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1500
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2650
2280
5500
4600
300
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Page 35
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