6 720 644 942
12
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.
Copper tubing is prohibited for use with Natural Gas in the Commonwealth of Massachusetts and not recommended
elsewhere.
Fig. 14
Follow boxed numbers for piping just one 520 HN (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.
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing
.
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
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
Pipe
Internal
Size
Diameter
inches
inches
10
20
30
40
50
60
70
80
90
100
125
150
175
200
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
105 0 730
590
500
440
400
370
350
320
305
275
250
225
210
Length of Black Iron Pipe, Feet
Nominal
Iron pipe
size
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
Black Iron Pipe
Lenght of pipe, Feet
Copper
Out side
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
Tube
size,
inches
EHD*
10
20
30
40
50
60
1/2
18 E HD 82
58
47
41
37
34
3/4
23 E HD 161
116
96
83
75
68
1
30 E HD 330
231
188
162
144
131
1 1/4
37 E HD 639
456
374
325
292
267
Length of Flexible Corrugated Stainless Steel Tub ing (CSST), Feet
Tube
size
inches
E HD*
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
