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FIG. 4
N.B. Gas pipes must comply with the standards in force. Both pipes and fittings must be of a
diameter proportional to the length of the pipe and the gas feed pressure.
DIAGRAM ILLUSTRATING REQUIRED DIAMETER OF GAS FEED PIPES
Flow rate in m
FIG. 5
PRESSURE DROP mm H2O
Example:
3
Flow rate:
20 m
/h
Diameter:
2"
Length:
45 m
GAS FEED PIPE DIAGRAM
3
/h (methane with relative density of 0.6)
Using a gas with a density
of 0.6 there will be
a pressure drop of
10 mm water column.
6
1
Gas check valve
2
Gas filter
3
Pressure regulator
4
Gas pressure switch
5
Gas pressure take-off on pressure
switch
6
Gas solenoid valves (adjustment, safety
etc.)
7
Burner
PIPE Ø IN INCHES
SPECIFIC WEIGHT OF OTHER GASES
0,6 . . . . . . . . . . . . . . . . . . . .
0,65 . . . . . . . . . . . . . . . . . . .
0,7 . . . . . . . . . . . . . . . . . . . .
0,75 . . . . . . . . . . . . . . . . . . .
0,8 . . . . . . . . . . . . . . . . . . . .
0,85 . . . . . . . . . . . . . . . . . . .
GB
Multiplier
coefficient
1,00
1,04
1,08
1,12
1,16
1,28
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