Bosch GWH 715 ES User Manual page 25

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 GWH 715 ES (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
10 20
Inches
1/2 291 200
3/4 608 418
1 1145 787
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. 30
6 720 608 158
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
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
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
Length of Pipe, Feet
30 40 50 60 80 100
160 137 122 110 94
336 287 255 231 197 175
632 541 480 434 372 330
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
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.
Lengt h of Flexible Corrugat ed St ainless St eel Tubing (CSST), Feet
Tube
size
inches
125 150 200
84 74 67 58
1/2
155 140 120
3/4
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
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
18 EHD 129 91 74
23 EHD 254 183 151
30 EHD 521 365 297
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
40 50
64 58
131 118
256 227
80 90 100
_ _ _
29 27 26
62 59 55
90
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