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Gas Requirements
39
70458101 (EN)
Gas Pipe Size Required for 1000 Btu Natural Gas —
17.4 ± 4 mbar, 1.74 ± 0.37 kPa (0.64 Specific Gravity at 7 ± 1.5 inches) Water Column Pressure
Equivalent Length
Gas
Appliances
Total Btu/hr.
7.63 m
(25 feet)
15.25 m
(50 feet)
22.88 m
(75 feet)
30.50 m
(100 feet)
38.13 m
(125 feet)
45.75 m
(150 feet)
Based on 0.3 in. Water Column Pressure Drop for Length Given
Sizes shown in mm (inches)
100,000
120,000
140,000
160,000
180,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
1,400,000
1,500,000
1,600,000
1,700,000
1,800,000
1,900,000
2,000,000
2,200,000
2,400,000
2,600,000
2,800,000
3,000,000
19.05 (0.75)
19.05 (0.75)
19.05 (0.75)
19.05 (0.75)
25.40 (1)
25.40 (1)
25.40 (1)
31.75 (1.25)
31.75 (1.25)
38.10 (1.5)
38.10 (1.5)
38.10 (1.5)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
19.05 (0.75)
25.40 (1)
25.40 (1)
25.40 (1)
25.40 (1))
25.40 (1)
31.75 (1.25)
31.75 (1.25)
38.10 (1.5)
38.10 (1.5)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
25.40 (1)
25.40 (1)
25.40 (1)
25.40 (1)
25.40 (1)
31.75 (1.25)
31.75 (1.25)
38.10 (1.5)
38.10 (1.5)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
88.90 (3.5)
25.40 (1)
25.40 (1)
25.40 (1)
31.75 (1.25)
31.75 (1.25)
31.75 (1.25)
38.10 (1.5)
38.10 (1.5)
50.80 (2)
50.80 (2)
50.80 (2)
50.80 (2)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
88.90 (3.5)
88.90 (3.5)
88.90 (3.5)
25.40 (1)
25.40 (1)
25.40 (1)
31.75 (1.25)
31.75 (1.25)
31.75 (1.25)
38.10 (1.5)
38.10 (1.5)
50.80 (2)
50.80 (2)
50.80 (2)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
88.90 (3.5)
88.90 (3.5)
88.90 (3.5)
88.90 (3.5)
88.90 (3.5)
25.40 (1)
25.40 (1)
31.75 (1.25)
31.75 (1.25)
31.75 (1.25)
38.10 (1.5)
38.10 (1.5)
50.80 (2)
50.80 (2)
50.80 (2)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
63.50 (2.5)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
76.20 (3)
88.90 (3.5)
88.90 (3.5)
88.90 (3.5)
88.90 (3.5)
88.90 (3.5)
101.60 (4)
For L.P. Gas, correct the total Btu/hr by multiplying it by 0.6. The answer is the equivalent Btu on the
above chart.
Table 7