COZY BFT101 Installation And Operation Instructions Manual page 8
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TABLE 1 – first stage pipe sizing
10 PSIG Inlet with a 1 PSIG Pressure Drop
Maximum capacity of pipe or tubing, in thousands of BTU/hr. of L.P. Gas
Size of Pipe
Or Copper
Tubing, Inches
1 0
3/8
558
Copper
½
1387
Tubing
5/8
2360
(O.D.)
¾
3993
½
3339
Pipe
¾
6982
Size
1
13153
1-1/4
27004
1-1/2
40461
2
77924
125
3/8
142
Copper
½
323
Tubing
5/8
601
(O.D.)
¾
1018
½
852
Pipe
¾
1780
Size
1
3354
1-1/4
6887
1-1/2
10318
2
19871
*Total length of piping from outlet of first stage regulator to inlet of second stage regulator (or to inlet of second stage regulator furthest
away).
Notes:
1) To allow 2 PSIG pressure drop, multiply total gas demand by .707, and use capacities from table.
2)
For different first stage pressures, multiply total gas demand by the following factors, and use capacities from table.
First State Pressure PSIG
2 0
2 1
TABLE 4 – Second, Single, or Integral Twin Stage Pipe Sizing
11 Inches Water Column Inlet with a ½ Inch Water Column Drop
Maximum capacity of pipe or tubing in thousands of BTU/hr of LP-Gas
Size of Pipe
Or Copper
Tubing, Inches
1 0
3/8
4 9
Copper
1/2
110
Tubing
5/8
206
(O.D.)
3/4
348
7/8
536
1/2
291
Pipe
3/4
608
Size
1
1146
1-1/4
2353
1-1/2
3525
2
6789
125
3/8
—
Copper
1/2
—
Tubing
5/8
—
(O.D.)
3/4
—
7/8
—
1/2
7 4
Pipe
3/4
155
Size
1
292
1-1/4
600
1-1/2
899
2
1731
*Total length of piping from outlet of regulator to appliance furthest away.
LENGTH OF PIPE OR TUBING, FEET*
2 0
3 0
4 0
383
309
265
870
700
599
1622
1303
1115
2475
2205
1887
2295
1843
1577
4799
3854
3298
9040
7259
6213
18560
14904
12756
27809
22331
19113
53556
43008
36809
150
175
200
130
118
111
293
269
251
546
502
467
923
843
790
772
710
660
1613
1484
1381
3039
2796
2601
6240
5741
5340
9349
8601
8002
18005
16564
15410
Multiply by
.844
.912
LENGTH OF PIPE OR TUBING, FEET*
2 0
3 0
4 0
3 4
2 7
2 3
7 6
6 1
5 2
141
114
9 7
239
192
164
368
296
253
200
161
137
418
336
287
788
632
541
1617
1299
1111
2423
1946
1665
4666
3747
3207
150
175
200
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
6 7
6 2
5 8
141
129
120
265
244
227
544
500
465
815
749
697
1569
1443
1343
PROPANE GAS
5 0
6 0
7 0
235
213
196
531
481
443
988
896
824
1672
1515
1394
1398
1267
1165
2923
2649
2437
5507
4989
4590
11306
10244
9424
16939
15348
14120
32623
29559
27194
225
250
275
104
9 0
8 9
235
222
211
438
414
393
740
700
664
619
585
556
1296
1224
1162
2441
2305
2190
5011
4733
4495
7508
7092
6735
14459
13658
12971
Data Calculated per NFPA #54 & 58.
PROPANE GAS
5 0
6 0
7 0
2 0
1 9
—
4 6
4 2
3 8
8 6
7 8
7 1
146
132
120
224
203
185
122
110
102
255
231
212
480
435
400
985
892
821
1476
1337
1230
2842
2575
2369
225
250
275
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
5 4
5 1
4 8
113
107
101
213
201
191
437
412
392
654
618
587
1260
1190
1130
Page 8
8 0
9 0
100
182
171
161
412
386
365
767
719
679
1297
1217
1149
1084
1017
961
2267
2127
2009
4270
4007
3785
8767
8226
7770
13136
12325
11642
25299
23737
22422
300
350
400
8 9
8 2
7 6
201
185
172
375
345
321
634
584
543
530
488
454
1109
1020
949
2089
1922
1788
4289
3945
3670
6426
5911
5499
12375
11385
10591
8 0
9 0
100
—
—
—
3 6
3 3
3 2
6 7
6 2
5 9
113
105
100
174
161
154
9 4
8 7
8 4
198
185
175
372
349
330
764
717
677
1144
1074
1014
2204
2068
1954
300
350
400
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
4 6
4 3
4 0
9 7
8 9
8 3
182
167
156
374
344
320
560
515
479
1078
992
923
Data Calculated per NFPA #54 & 58.
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