Louisville Tin and Stove VFT202 - Manual (Page 7)

Nominal Iron Pipe
Internal
Size,
Diameter
,
Inches
Inches
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
9
0
1
0
0
1
2
5
150
1
7
5
2
0
0
¼
0.364
43
29
24
20
18
16
15
14
13
12
11
10
9
8
3
/8
0.493
95
65
52
45
40
36
33
31
29
27
24
22
20
19
½
0.622
17
5
12
0
97
82
73
66
61
57
53
50
44
40
37
35
¾
0.824
360
250
200
170
151
138
125
118
110
103
93
84
77
72
1
1.049
680
465
375
320
285
260
240
220
205
195
175
160
145
135
1-1/4
1.38
1400
950
770
660
580
530
490
460
430
400
360
325
300
280
1-1/2”
1.61
2100
1460
1180
990
900
810
750
690
650
620
550
500
460
430
2
2.067
3950
2750
2200
1900
1680
1520
1400
1300
1220
1150
1020
950
850
800
2-1/2
2.469
6300
4350
3520
3000
2650
2400
2250
2050
1950
1850
1650
1500
1370
1280
3
3.068
11000
7.
7
6250
5300
4750
4300
3900
3700
3450
3250
2950
2650
2450
2280
4
4.026
23000
15800
12800
10900
9.
7
8800
8100
7500
7200
6700
6000
5500
5000
4600
SEE FOLLOWING CHAR
TS FROM NFPN54, ANSI Z223.1 T
O DETERMINE PROPER GAS SUPPL
Y LINE SIZE REQUIRED T
O SUPPOR
T T
O
T
AL BTU REQUIRE-
MENTS.
NA
TURAL GAS
Maximum Capacity of Pipe in Cubic Feet of Gas per Hour for Gas Pressures of 0.5 psig or Less and a Pressure Drop of 0.5 Inch W
ater Column.
(Based on a 0.60 Specific Gravity Gas)
LENGTH OF PIPE, FEET
* Pipe and T
ubing Selection
T
otal piping length = 84 feet (use table 4 @ 90 feet)
From a to b, demand =200,000 + 38,000 +65,000+35,000
= 338,000 BTU/hr
. use 1” pipe.
From b to c, demand = 38,000 + 65,000 + 35,000
= 138,000 BTU/hr; use ¾” pipe or 7/8” tubing.
From c to d, demand = 65,000 + 35,000
= 100,000 BTU/hr; use ¾” pipe or ¾” tubing.
From d to e, demand = 35,000 BTU/hr; use ½” pipe or 5/8” tubing. From b to f, demand = 200,000 BTU/hr; use 1” pipe. From c to g, demand = 38,000 BTU/hr; use ½” pipe or 5/8” tubing. From d to h, demand = 65,000 BTU/hr; use ½” pipe or ¾” tubing. Example 2
.
Determine the sizes of piping or tubing required for the two-stage L.P
.
Gas installation shown.
First Stage Regulator
26 Feet
Second Stage Regulator
W
ater
Heater 38,000
Furnace 200,000
58 Feet
Range 65,000
Clothes Dryer 35,000
*Information from - REGO PRODUCTS “LP GAS SER
VICEMAN’S MANUAL”
SEE FOLLOWING P
AGE FOR PIPE SIZING CHAR
TS FOR PROP
ANE GAS.
Page 7
T
otal first stage piping length = 26 feet; first stage r
egulator setting is 10 PSIG (use T
able 1 or 3,
@ 30 feet)
From aa to a, demand = 338,000 BTU/hr; use ½” pipe, ½” tubing, or ½” T plastic pipe. T
otal second stage piping length = 58 feet (use table 4, @
60 feet). From a to b, demand = 338,000 BTU/hr; use 1” pipe. From b to c, demand = 138,000 BTU/hr; use ¾” pipe or 7/8” tubing. From c to d, demand = 100,000 BTU/hr; use ½” pipe or ¾” tubing. From d to e, demand = 35,000 BTU/hr; use ½” pipe or ½” tubing. From b to f, demand = 200,000 BTU/hr; use ¾” pipe. From c to g, demand = 38,000 BTU/hr; use ½” pipe or 5/8” tubing.