ECR International Utica Boilers UB90-50 Installation, Operation & Maintenance Manual page 29

Length of
Pipe - Ft.
20
40
60
Length of
Pipe - Ft.
20
40
60
Figure 19 - Gas Piping
GAS SUPPLY PIPING
Table 7 – Gas Pipe Sizes
NATURAL GAS
Pipe Capacity - BTU Per Hour Input Includes Fittings
1/2" 3/4"
92,000 190,000
63,000 130,000
50,000 105,000
PROPANE GAS
Pipe Capacity - BTU Per Hour Input Includes Fittings
Copper Tubing*
5/8" 3/4"
131,000 216,000
90,000 145,000
72,000 121,000
* Outside diameter
1"
350,000
245,000
195,000
1/2"
189,000
129,000
103,000
SAFETY RELIEF
VALVE SEE
PAGE 18 FOR
REQUIREMENTS
3" (76mm) MINIMUM
29
1 1/4"
625,000
445,000
365,000
Iron Pipe
3/4"
393,000
267,000
217,000
P/N 240010135 Rev. D [04/15/2017]