ENERGY KINETICS EK1C, Installation & Service Manual

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Accel CS Boiler - Gas Heat - Eighth Edition – January, 2015 26
GAS PIPE SIZING
Size the gas piping from meter outlet to boiler in accordance with the below table.
Use total output of all connected appliances. Divide total input in BTU/hour by 1000 to obtain the approximate number of
cubic feet per hour of natural gas.
Pipe lengths given in table are equivalent length of straight pipe. Convert pipe fittings to equivalent lengths using data
from the below table.
For additional gas pipe sizing information, refer to ANSI Z223.1 (or B149.1 or B149.2 for Canadian installations).
The following tables provide suggested sizing for Schedule 40, Black Iron Pipe. Be sure to add the appropriate
equivalent length for every fitting and elbow used. For other types of pipe or tubing, consult NFPA 54 or the manufacturer
of the pipe or tubing or your gas supplier for pipe sizing information.
BEST PRACTICE: When selecting gas pipe size for a LPG installation, plan ahead and size the piping as if for a natural
gas installation. If in the future the boiler is ever converted from LPG to natural gas, then the gas
piping will already be properly sized.
For LPG, drawing up to 150,000 Btu/Hr (60 Cubic Feet per Hour).
For Natural Gas, drawing up to 150,000 Btu/Hr (140 Cubic Feet per Hour).
For LPG, drawing up to 250,000 Btu/Hr (100 Cubic Feet per Hour).
For Natural Gas, drawing up to 250,000 Btu/Hr (250 Cubic Feet per Hour).
For LPG, drawing up to 399,000 Btu/Hr (156 Cubic Feet per Hour).
For Natural Gas, drawing up to 399,000 Btu/Hr (399 Cubic Feet per Hour).
Natural Gas LPG
Iron Pipe Size,
Inches
Maximum Equivalent
Length, Feet
Iron Pipe Size,
Inches
Maximum Equivalent
Length, Feet
½ 20
¾ 30 ¾ 90
1 100 1 200
1-1/4 200 1-1/4 200
Natural Gas LPG
Iron Pipe Size,
Inches
Maximum Equivalent
Length, Feet
Iron Pipe Size,
Inches
Maximum Equivalent
Length, Feet
¾ 10 ¾ 20
1 40 1 90
1-1/4 150 1-1/4 200
Natural Gas LPG
Iron Pipe Size,
Inches
Maximum Equivalent
Length, Feet
Iron Pipe Size,
Inches
Maximum Equivalent
Length, Feet
¾ 15
1 25 1 50
1-1/4 100 1-1/4 200
Iron Pipe Size,
Inches
Equivalent Length, Feet
90º Elbow Tee
Short Radius Line Flow Branch Flow
1/2 3.6 1.7 4.2
3/4 4.4 2.4 5.3
1 5.2 3.2 6.6
1-1/4 6.6 4.6 8.7