4.9.2 Gas Line Sizing Tables For Lp Gas - Bosch 830 ES Installation And Operating Instructions Manual
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4.9.2 Gas Line Sizing Tables for LP GAS
For your convenience see below for an excerpt from gas line sizing tables for a single LP appliance. Their intended use of is for pipe
sizing between the 2nd stage (low pressure) regulator and the appliance. For details see the current NFPA 54 or NFPA 58.
Specified pipe lengths are for one 830 ES which has a maximum input rating of 175,000 BTUs. The gas supply system must be sized
for the combined total maximum BTU/hr load requirements of all gas appliances running simultaneously.
The tables below show the maximum capacity of the gas supply pipe in thousands of BTU per hour of Undiluted LP Gas at 11" W.C
(0.4 psig or 27.4 mbar) based on a pressure drop of 0.5" W.C.
Nominal Iron
Internal
Pipe inches
Diameter inches
1/2
0.622
3/4
0.824
1
1.049
Table 28
Tube size,
inches
EHD*
3/4
23
3/4
23
1
30
1
31
Table 29
* EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing.
Nominal Iron
Internal Diameter
Pipe inches
inches
5/8
0.527
3/4
0.652
Table 30
Maximum Capacity of Semi-Rigid (flexible, non corrugated) Tubing in Thousands of BTU/hr 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.
40
Length of Black iron Pipe (Schedule 40 Metallic Pipe), Feet
10
20
291
200
608
418
1150
787
Length of Corrugated Stainless Steel Tubing (CSST),
Feet
10
20
30
254
183
151
303
216
177
521
365
297
605
425
344
Length of Semirigid (soft) Copper ACR Tubing, Feet
10
20
188
129
329
226
30
40
50
160
137
122
336
287
255
632
541
480
40
50
60
131
118
107
153
137
126
256
227
207
297
265
241
30
104
182
60
80
110
101
231
212
434
400
70
80
90
99
94
90
117
109
102
191
178
169
222
208
197
40
50
89
79
155
138
830 ES – 6 720 644 936 (2021/08)
100
94
197
372
100
85
98
159
186
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