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Gas Pipe Sizing Chart – Black Iron Pipe
INSTALLER’S INSTALLATION INSTRUCTIONS
Capacity Table for Natural Gas
cubic feet / hour
(table assumes .3 inch pressure drop, specific gravity of .60)
Nominal Length of Pipe in Feet
Iron Pipe
Size
Inches
10 20 30 40 50 60 70 80 90 100 125 150 175 200
3/4 278 190 152 130 115 105 96 90 84 79 72 64 59 55
1 520 350 285 245 215 195 180 170 160 150 130 120 110 100
1-1/4 1050 730 590 500 440 400 370 350 320 305 275 250 225 210
1-1/2 1600 1100 890 760 670 610 560 530 490 460 410 380 350 320
After determining the length of pipe required select the pipe size that will supply the
cubic feet per hour of gas required for the input rating of the Continuum V2532W
.
The formula for figuring the cubic feet per hour required is:
Gas Input of Continuum V2532W(BTU/HR)
CFH =
Heating Value of Gas(BTU/FT
3
)
*Gas input requirement is on the water heater data plate
*The heating value of the gas can be obtained from the local Natural Gas Utility
Capacity Table for LP Gas
BTUH of undiluted liquified petroleum gases
(table assumes 11 inches of water column pressure at the inlet, .5 inch drop)
NOTE: Refer to the National Fuel Gas Code, NFPA 54, for capacity tables for pipe
materials other than “Black Iron Pipe”.
Nominal Length of Pipe in Feet
Iron Pipe
Size
Inches
Model V2532W 2 7
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