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Gas Pipe Sizing
             
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GAS PIPE SIZING

To provide adequate gas pressure to the gas unit,

size the gas piping as follows:

1. Find the cu. ft./hr. by using the following formula:

 

Cu. ft./hr. =Input

                 BTU

 

2. Refer to Table 1. Match “Length of Pipe in Feet”

with appropriate “Gas Input - Cu. Ft./Hr.” figure.

This figure can then be matched to the pipe size at

the top of the column.

Example:

It is determined that a 67 foot (20.4m) run of gas

pipe is required to connect a 75 MBTU gas unit

heater to a 1,000 BTU/cu ft. (0.29kW) natural gas

supply.

 

75,000 BTU/Hr

1,000 BTU/cu. ft.= 75 Cu. ft./hr.

 

Using Table 1, a 3/4 inch pipe is needed.

 



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