AERCO Innovation (G-10-1350 to G-11-0563) - Manual (Page 147)

07/21/11 AERCO International, Inc.
· 100 Oritani Dr. · Blauvelt, NY 10913 · Ph: 800-526-0288
Page 147 of 200
GF-5030
Gas Supply Design Guide
TABLE 4
Pipe Sizing Table for 5 Pounds Pressure Capacity of Pipes of Different Diameters and Lengths in Cubic
Feet per Hour for an Initial Pressure of 5.0 psi with a 10% Pressure Drop and a Gas of 0.6 Specific Gravity
Pipe Size of
Schedule 40
Standard Pipe
(Inches)
Internal
Diameter
(Inches)
Total Equivalent Length of Pipe (Feet)
50 100 150 200 250 300 400 500
2.00 2.067 11786 8101 6505 5567 4934 4471 3827 3391
2.50 2.469 18785 12911 10368 8874 7865 7126 6099 5405
3.00 3.068 33209 22824 18329 15687 13903 12597 10782 9556
3.50 3.548 48623 33418 26836 22968 20365 18444 15786 13991
4.00 4.026 67736 46555 37385 31997 28358 25694 21991 19490
5.00 5.047 122544 84224 67635 57887 51304 46485 39785 35261
6.00 6.065 198427 136378 109516 93732 83073 75270 64421 57095
Venting of Gas Supply Regulators
AERCO’s general guidelines for venting of gas regulators are listed below. AERCO recommends that
these guidelines be followed to ensure the most reliable and proper operation of AERCO gas fired
equipment. It is also recommended that you consult local codes and the gas regulator manufacturer for
additional details. Always follow the most stringent guidelines available, including those listed below.
· When venting a gas supply regulator, the vent pipe must be no smaller than the regulator vent size.
· In a multiple unit installation, each regulator must have a separate vent line.
· Vent lines must not be manifolded together or with any other equipment at the site that also requires
atmospheric vents.
· When sizing the vent, pipe diameters must be increased by one pipe diameter every 20 equivalent
feet of pipe.
·
Each 90° elbow is equivalent to approximately:
Þ
2.5 feet for nominal pipe sizes of up to 3/4”
Þ
4.5 feet for nominal pipe sizes of up to 1-1/2”
Þ
10.5 feet for nominal pipe sizes of up to 4”
·
·
Each 45° elbow is equivalent to approximately:
Þ
1 foot for nominal pipe sizes of up to 3/4”
Þ
2 feet for nominal pipe sizes of up to 1-1/2”
Þ
5 feet for nominal pipe sizes of up to 4”
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