6 720 607 909
24
Installation instructions
FOR NATURAL GAS
Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop
of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands.
Fig. 26
Follow boxed numbers for piping just one GWH-450-ESR (example: ¾” B.I. Natural Gas pipe for 20 ft
(6.1m). will handle 190,000 btu’s (55.7 kWh). For multiple appliances combine the total btu input load and
then refer to applicable chart below. Follow the shaded numbers for just one GWH-345-ESR.
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing
.
Maximum Capacity of Semi-Rigid (flexible, non
corrugated) Tubing in Thousands of BTU per Hour of
Undiluted Liquefied Petroleum Gases (at 11 inches
Water Column Inlet Pressure).
(Based on a Pressure Drop of 0.5 Inch Water Column)
* Source National Fuel Gas Code NFPA 54, ANSI
Z223.1 - No Additional Allowance is necessary for an
ordinary number of fittings
FOR LP GAS
Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases (at 11 inches Water Column Inlet
Pressure) (Based on a Pressure Drop of 0.5 Inch Water Column).
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing.
Nominal
Iron
Length of Black Iron Pipe, Feet
Pipe
Internal
Size,
Diameter
(inches) (inches)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
1/4
0.364
32
22
18
15
14
12
11
11
10
9
8
8
7
6
3/8
0.493
72
49
40
34
30
27
25
23
22
21
18
17
15
14
1/2
0.622
132
92
73
63
56
50
46
43
40
38
34
31
28
26
3/4
0.824
278
190
152
130
115
105
96
90
84
79
72
64
59
55
1
1.049
520
350
285
245
215
195
180
170
160
150
130
120
110
100
1 1/4
1.380
1050
730
590
500
440
400
370
350
320
305
275
250
225
210
1 1/2
1.610
1600
1100
890
760
670
610
560
530
490
460
410
380
350
320
2
2.067
3050
2100
1650
1450
1270 1150 1050
990
930
870
780
710
650
610
2 1/2
2.469
4800
3300
2700
2300
2000 1850 1700
1600
1500
1400
1250
1130
1050
980
3
3.068
8500
5900
4700
4100
3600 3250 3000
2800
2600
2500
2200
2000
1850 1700
4
4.026
17,500 12,000 9,700 8,300
7,400 6,80 6,200 5,800 5,400 5,100 4,500
4,100 3,800 3500
Tube
size,
inches
EHD*
10
20
30
40
50
60
1/2
18 EHD 82
58
47
41
37
34
3/4
23 EHD 161
116
96
83
75
68
1
30 EHD 330
231
188
162
144
131
1 1/4
37 EHD 639
456
374
325
292
267
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Nominal
iron
Black Iron Pipe
pipe
Length of Pipe, Feet
Inches
10
20
30
40
50
60
80
100
125
150
200
1/2
291
200 160 137 122 110
94
84
74
67
58
3/4
608
418 336 287 255 231 197
175
155
140
120
1
1145 787 632 541 480 434 372
330
292
265
227
Tube
size
inches
EHD*
10
20
30
40
50
60
1/2
18 EHD 129
91
74
64
58
53
3/4
23 EHD 254
183
151
131
118
107
1
30 EHD 521
365
297
256
227
207
1 1/4
37 EHD 971
661
528
449
397
359
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Copper
Outside
Length of Tubing, Feet
diameter
Inch
10
20
30
40
50
60
70
80
90
100
3/8
39
26
21
19
_
_
_
_
_
_
1/2
92
62
50
41
37
35
31
29
27
26
5/8
199 131
107
90
79
72
67
62
59
55
3/4
329 216
181 145
131
121 112 104
95
90
