Operations Manual

Low Pressure Gas Pipe Sizes
NOTE: Sizing calculations based on National Fuel Gas
Code.
Gas Pipe Size Required for 1000 BTU Natural Gas (Standard Conditions) at Upstream Pressure— 7 ± 1.5 in-
ches water column pressure [17.4 ± 4 mbar, 1.74 ± 0.37 kPa]
Gas Appli-
ances Total
BTU/hr.
Equivalent Length
25 feet [7.6
m]
50 feet
[15.2 m]
75 feet
[22.9 m]
100 feet [30
m]
125 feet [38
m]
150 feet [46
m]
Based on 0.3 inches Water Column Pressure Drop for Length Given
Sizes shown in Gas Pipe Nominal Size (NPT)
100,000 3/4 3/4 3/4 1 1 1
120,000 3/4 3/4 1 1 1 1
140,000 3/4 1 1 1 1 1
160,000 3/4 1 1 1 1-1/4 1-1/4
180,000 3/4 1 1 1-1/4 1-1/4 1-1/4
200,000 1 1 1 1-1/4 1-1/4 1-1/4
300,000 1 1-1/4 1-1/4 1-1/4 1-1/2 1-1/2
400,000 1-1/4 1-1/4 1-1/2 1-1/2 1-1/2 1-1/2
500,000 1-1/4 1-1/2 1-1/2 1-1/2 1-1/2 2
600,000 1-1/4 1-1/2 1-1/2 2 2 2
700,000 1-1/2 1-1/2 2 2 2 2
800,000 1-1/2 1-1/2 2 2 2 2
900,000 1-1/2 2 2 2 2 2-1/2
1,000,000 1-1/2 2 2 2 2-1/2 2-1/2
1,100,000 1-1/2 2 2 2 2-1/2 2-1/2
1,200,000 1-1/2 2 2 2-1/2 2-1/2 2-1/2
1,300,000 2 2 2-1/2 2-1/2 2-1/2 2-1/2
1,400,000 2 2 2-1/2 2-1/2 2-1/2 2-1/2
1,500,000 2 2 2-1/2 2-1/2 2-1/2 2-1/2
1,600,000 2 2 2-1/2 2-1/2 2-1/2 3
Table 5 continues...
Gas Requirements
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46 Part No: 70457901ENR14