Gas Connection - Blodgett DFG-200 Series Installation Operation & Maintenance

GAS PIPING
A properly sized 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 appliances on the line
without loss of pressure at the equipment.
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 current appliances.
Pitco Fryer
6 Burner Range
Deck Oven
Total
2. Add the BTU rating of the new oven to the to-
tal.
Previous Total
DFG-100
New Total
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 your current gas piping.
The total 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 straight pipe lengths only. Any elbows
or other fittings will decrease pipe capaci-
ties. Contact your local gas supplier if you
have any questions.
Maximum Capacity of Iron Pipe in Cubic Feet
Length (ft) L
120,000 BTU
60,000 BTU
50,000 BTU
230,000 BTU
230,000 BTU
Maximum Capacity of Pipe in Thousands of
55,000 BTU
BTU/hr of Undiluted L.P . Gas at 11" W.C.
285,000 BTU
Pipe Length p
From the National Fuel Gas Code Part 10 Table 10-15
11
Installation
of Natural Gas Per Hour
(Pressure drop of 0.5 Inch W.C.)
Nominal Size, Inches
Pipe p
h (f )
3/4" 1"
10 360 680
20 250 465
30 200 375
40 170 320
50 151 285
60 138 260
70 125 240
80 118 220
90 110 205
100 103 195
From the National Fuel Gas Code Part 10 Table 10-2
(Pressure drop of 0.5 Inch W.C.)
g Outside Diameter, Inches
(ft) (f )
3/4"
10 608
20 418
30 336
40 287
50 255
60 231
70 215
80 198
90 187
100 175

Gas Connection

1-1/4" 1-1/2" 2"
1400 2100 3950
950 1460 2750
770 1180 2200
660 990 1900
580 900 1680
530 810 1520
490 750 1400
460 690 1300
430 650 1220
400 620 1150
1" 1-1/2"
1146 3525
788 2423
632 1946
541 1665
480 1476
435 1337
404 1241
372 1144
351 1079
330 1014