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Page 16
Brute 1000 & 1200
TO SIZE PIPING:
NATURAL GAS
Measure linear distance from meter outlet
to last boiler. Add total input of all boilers
REQUIRED
and divide by 1000 to obtain cu ft / hr
CU FT
required. Add total equivalent length of
SIZE
/ HR.
fittings used according to Table 6B. Align
1000
1000
total length (pipe and fittings) on left side
1200
1200
column of Table 6C with highest cubic feet
of gas required.
Notes:
Consult and confirm with Applicable Fuel
Gas Code before beginning work.
Verify gas inlet pressure is between 4 and
13 in W.C. before starting boiler.
Table 6A - Natural Gas Requirements
EQUIVALENT LENGTHS OF STRAIGHT PIPE FOR TYPICAL
SCH 40 FITTINGS
NOMINAL PIPE SIZE
FITTING
1/2"
3/4"
LINEAR FEET
90° ELBOW 3.6
4.4
TEE
4.2
5.3
Table 6B - Equivalent Pipe Lengths
1"
1-1/4"
1-1/2"
5.2
6.6
7.4
8.5
6.6
8.7
9.9
12
SCH 40 METAL PIPE CAPACITY FOR 0.60 SPECIFIC GRAVITY
NOMINAL PIPE SIZE @ 0.30" W.C. PRESSURE DROP
LENGTH 1/2"
3/4"
FT
CUBIC FEET OF GAS PER HOUR
20
92
190
40
130
60
105
80
90
100
Table 6C - Pipe Capacity for Natural Gas
SCHED 40 METAL PIPE CAPACITY FOR 1.50 SPECIFIC
GRAVITY UNDILUTED PROPANE
NOMINAL PIPE SIZE @ 11" W.C. INLET AND 0.5" W.C.
2"
SIZE
1/2"
3/4"
LENGTH MAXIMUM CAPACITY IN THOUSANDS OF BTU PER
20
200
418
40
137
287
60
110
231
80
94
197
100
84
175
Notes:
1. Follow all local and national LP gas codes for line sizing and
equipment requirements.
2. Verify that inlet gas pressure remains between 4 and 13 inches
of water column before and during operation.
Source: ANSI Z223.1-80 National Fuel Gas Code.
Table 6D - Pipe Capacity for Propane
B
RADFORD
NATURAL GAS
1"
1-1/4"
1-1/2"
350
730
1100
2100
245
500
760
1450
195
400
610
1150
170
350
530
150
305
460
PRESSURE DROP
1"
1-1/4"
1-1/2"
HOUR
787
1616
2422
541
1111
1664
434
892
1337
372
763
1144
330
677
1014
W
HITE
2"
990
870
2"
4664
3205
2574
2203
1952
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