Duke Manufacturing Co.
2305 N. Broadway
•
St. Louis, Missouri
800-735-3853
•
314-231-1130
•
Fax 314-231-5074
www.dukemfg.com
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D. Gas Piping
Each section of the "E" Series or 6/13-G Ovens (standard
depth) is rated at 40,000 BTU's per hour (11.7 kW) or
(deep depth) 46,000 BTU's per hour (13.5 kW).
Therefore, 38-40 (standard), 44-46 (deep) cubic feet of
natural gas or 16 (standard), 18.4 (deep) cubic feet of
propane gas per hour must be supplied to each unit
(stacked units count as two) when the oven is full on. In
order to achieve the degree of performance for which the
unit has been designed, the overall piping plan of the
kitchen, properly sized, is essential. The installation of
this oven must conform with all local codes, or in the
absence of any local codes, to the National Fuel Gas
Code, NFPA 54 and ANSI Z 223.1.
Your local gas supplier should consult the National Fuel
Gas Code for proper sizing and installation of gas piping.
Generally, piping should be sized to provide a gas supply
sufficient to meet the maximum demand of all gas
appliances on a line without undue loss of pressure at the
outlet to the equipment. The total BTU requirements of
the equipment being served and the length of the piping
from the meter to the appliances are major considerations
in the proper design of the gas supply system.
This oven has been tested and certified for use on gas
systems that do not exceed 1/2 psi (3.45 kPa) of pressure.
If the piping system is tested at a pressure higher than 1/2
psi (3.45 kPa), this oven should be isolated from the
supply by disconnecting it. If the piping system is tested
at a pressure lower than or equal to 1/2 psi (3.45 kPa),
this oven should be isolated from the supply by shutting
off the manual shut off valve located on the front panel.
MAXIMUM CA
P
ACITY OF IRON PIPE IN CUBIC FEET PER
HOUR (PRESSURE DROP OF 0.5" W.C.) NATURAL GAS
Length in Feet
1
/2"
3/4"
1
"
1
.
1
/
2"
2"
10
175
360
680
2100
3950
20
120
250
465
1
460
2750
30
97
200
375
1180
2200
40
82
170
320
990
900
50
73
151
285
900
1
680
60
66
138
260
810
1520
70
61
125
240
750
1400
80
57
118
220
690
1300
90
53
110
205
650
1220
100
50
103
195
620
1
1
50
From National Fuel Gas Code
MAXIMUM CAPACITY OF PIPE IN
THOUSANDS OF BTU'S PER HOUR OF
UNDILUTED PRO
P
ANE GAS AT 11" W.C.
Length
in Feet
1/
2"
3/4"
1"
10
275
567
107
1
20
189
393
732
30
152
315
590
40
129
267
504
50
114
237
448
60
103
217
409
70
96
196
378
80
86
185
346
90
83
173
322
100
78
162
307
From National Fuel Gas Code
