Bosch 940 ESO Instruction Manual page 20

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.
Follow boxed numbers for piping just one 940 ESO (example: ¾" B.I. Natural Gas pipe for 10 ft (3.0m). will
handle 278,000 btu's (81.5 kWh). For multiple appliances combine the total maximum 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 0.824 278 190
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
1 1/4 37 EHD 639 456
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
inches 10 20 30
1/2 291 200 160 137 122 110
3/4 608 418 336 287 255 231 197
1 1145 787 632 541 480 434 372
Maximum Capacity of
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
Fig. 26
20
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
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
188 162 144 131 * EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing
374 325 292 267
Black Iron Pipe
Lenght of Pipe, Feet
40 50 60 80 100
94 84
175
330
Semi-Rigid (flexible,
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
125 150 200
1/2
74 67 58
3/4
155 140 120
292 265 227
1
non
Outside
diameter
Inch 10 20
3/8 39 26
1/2 92 62
5/8 199 131
3/4 329 216
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
Copper
Length of Tubing, Feet
30 40 50 60 70
21 19 _ _ _
50 41 37 35 31
107 90 79 72 67
181 145 131 121 112 104 95
50 60
58 53
118 107
227 207
80 90 100
_ _ _
29 27 26
62 59 55
90
6 720 644 956