Bosch 250 SXO LP User Manual page 11

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 250 SXO (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 20
1/4 0.364 32 22
3/8 0.493 72 49
1/2 0.622 132 92
3/4 0.824 278 190
1 1.049 520 350
1 1/4 1.380 1050 730
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
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. 12
6 720 607 440
Length of Black Iron Pipe, Feet
30 40 50 60
18 15 14 12
40 34 30 27
73 63 56 50
152 130 115 105
285 245 215 195 180
590 500 440 400 370
890 760 670 610 560
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
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
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
170 160 150 130
350 320 305 275
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
100 125 150
78 69 63
1/2
146 132
3/4
275 252
1
567 511
866 787 1 1/4
Outside
diameter
Inch 10 20
3/8 39 26
1/2 92 62
5/8 199 131
3/4 329 216
Appliance details
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
107 90 79 72 67 62
181 145 131 121 112 104 95
50 60
58 53
118 107
227 207
397 359
90 100
_ _
27 26
59 55
90
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