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Installation
11
Gas Connection
GAS PIPING
A properly s ized gas supply system is essential for
maximum oven performance. Piping should be
sized to provide a supply of gas sufficient to meet
the maximum demand of all a ppliances on the line
without loss of pressure at the e quipment.
Example:
NOTE: BTU values in the following example are
for natural gas.
You purchase a DFG-100 convection oven to add
to your existing cook line.
1. Add the BTU rating of your currentappliances.
Pitco Fryer 120,000 BTU
6 Burner Range 60,000 BTU
Deck Oven 50,000 BTU
Total 230,000 BTU
2. Add the BTU rating of the new oven to the to-
tal.
Previous Total 230,000 BT U
DFG-100 55,000 BTU
New Total 285,000 BTU
3. Measure the distance from the gas meter to
the cook line. This is the pipe length. Let’s say
the pipe length is 40’ (12.2 m) and the pipe
size is 1” (2.54 cm).
4. Use the appropriate table to determine the to-
tal capacity of y our current g as piping.
The t ota l capacity for this example is 320,000
BTU. Since the total required gas pressure,
285,000 BTU is less than 320,000 BTU, the
current gas piping will not have to be in-
creased.
NOTE: The BTU capacities given in the tables are
for s traight pipe lengths only. Any elbows
or other fittings will decrease pipecapaci-
ties. Contact your local gas supplier if you
have any questions.
Maximum Capacity of Iron P ipe in C ubic Feet
of Natural Gas Per Hour
(Pressure drop of 0.5 Inch W.C.)
Pipe
L
h
(
f
)
Nominal Size, Inches
p
Length (ft)
3/4” 1” 1-1/4” 1-1/2” 2”
10 360 680 1400 2100 3950
20 250 465 950 1460 2750
30 200 375 770 1180 2200
40 170 320 660 990 1900
50 151 285 580 900 1680
60 138 260 530 810 1520
70 125 240 490 750 1400
80 118 220 460 690 1300
90 110 205 430 650 1220
100 103 195 400 620 1150
From the National Fuel Gas Code Part 10 Table 10-2
Maximum Capacity of Pipe in Thousands of
BTU/hr of Undiluted L.P. G as at 11” W.C.
(Pressure drop of 0.5 Inch W.C.)
Pipe Length
(
f
)
Outside Diameter, Inches
p
g
(ft)
3/4” 1” 1-1/2”
10 608 1146 3525
20 418 788 2423
30 336 632 1946
40 287 541 1665
50 255 480 1476
60 231 435 1337
70 215 404 1241
80 198 372 1144
90 187 351 1079
100 175 330 1014
From the National Fuel Gas Code Part 10 Table 10-15