Table of Contents
Advertisement
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.
Follow boxed numbers for piping just one AQ125 BO (example: ¾" B.I. Natural Gas pipe for 20 ft (6. 1 m).
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.
Nominal
Iron
Pipe
Internal
Size
Diameter
inches
inches
10
1/4
0.364
32
3/8
0.493
72
1/2
0.622
132
3/4
0.824
278
1
1.049
520
1 1/4
1.380
1050
1 1/2
1.610
1600
1100
2
2.067
3050
2100
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Tube
size,
inches
EHD*
10
20
1/2
18 EHD 82
58
3/4
23 EHD 161 116
1
30 EHD 330 231
188
1 1/4
37 EHD 639 456
374
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).
Nominal
Iron pipe
size
10
20
30
inches
1/2
275 189 152
3/4
567 693 315
1
107 732 590
1 1/4 220 149 121
1 1/2 330 229 185
2
622 433 346
Maximum Capacity of Semi-Rigid copper 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
Fig. 8
8 716 473 147
Length of Black Iron Pipe, Feet
20
30
40
50
60
22
18
15
14
12
49
40
34
30
27
92
73
63
56
50
190
152
130
115
105
350
285
245
215
195
730
590
500
440
400
890
760
670
610
1650 1450 1270 1150 1050
30
40
50
60
47
41
37
34
96
83
75
68
* EHD = Equivalent Hydraulic Diameter. The greater the
162
144
131
value of EHD, the greater the gas capacity of the tubing
325
292
267
Black Iron Pipe
Length of pipe, Feet
40
50
60
70
80
90
100
129 114 103 96
89
83
267 237 217 196 185 173 162
504 448 409 378 346 322 307
103 913 834 771 724 677 630
155 141 127 118 108 102 976
299 264 239 220 204 192 1811 1606 1496
70
80
90
100
125
11
11
10
9
8
25
23
22
21
18
46
43
40
38
34
96
90
84
79
72
180
170
160
150
130
370
350
320
305
275
560
530
490
460
410
990
930
870
780
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing.
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Tube
size
inches
125
150
78
69
63
1/2
146
132
3/4
275
252
567
511
1
866
787
1 1/4
Outside
diameter
Inch
10
20
3/8
39
26
1/2
92
62
5/8
199 131 107
3/4
329 216 181 145 131 121 112 104 95
Installation instructions
150
175
200
8
7
6
17
15
14
31
28
26
64
59
55
120
110
100
250
225
210
380
350
320
710
650
610
.
EHD*
10
20
30
40
18 EHD 129 91
74
64
23 EHD 254 183
151
131
30 EHD 521 365
297
256
37 EHD 971 661
528
449
Copper
Length of Tubing, Feet
30
40
50
60
70
80
21
19
_
_
_
50
41
37
35
31
29
90
79
72
67
62
50
60
58
53
118 107
227 207
397 359
90 100
_
_
_
27
26
59
55
90
11
Advertisement
Table of Contents
