Installation
RT-SVX46G-EN
39
Table 6.
Temperature vs. resistance
Temperature
Nominal Resistance
Degrees F°
Degrees C°
-20°
-28.9°
170.1 K - Ohms
-15°
-26.1°
143.5 K - Ohms
-10°
-23.3°
121.4 K - Ohms
-5°
-20.6°
103.0 K - Ohms
0°
-17.8°
87.56 K - Ohms
5°
-15.0°
74.65 K - Ohms
10°
-12.2°
63.80 K - Ohms
15°
-9.4°
54.66 K - Ohms
20°
-6.7°
46.94 K - Ohms
25°
-3.8°
40.40 K - Ohms
30°
-1.1°
34.85 K - Ohms
35°
1.7°
30.18 K - Ohms
40°
4.4°
26.22 K - Ohms
45°
7.2°
22.85 K - Ohms
50°
10.0°
19.96 K - Ohms
55°
12.8°
17.47 K - Ohms
60°
15.6°
15.33 K - Ohms
65°
18.3°
13.49 K - Ohms
70°
21.1°
11.89 K - Ohms
75°
23.9°
10.50 K - Ohms
80°
26.7°
9.297 K - Ohms
85°
29.4°
8.247 K - Ohms
90°
32.2°
7.330 K - Ohms
95°
35.0°
6.528 K - Ohms
Table 7.
Sizing natural gas pipe mains and branches
Length of Pipe (Ft.)
Iron Pipe Size (IPS) Inches
½"
Pipe
¾"
Pipe
1"
Pipe
1¼"
Pipe
1½"
Pipe
15
76
176
345
750
1220
30
52
120
241
535
850
45
43
99
199
435
700
60
38
86
173
380
610
75
77
155
345
545
Note:
Capacity of Pipe of Different Diameters and Lengths in Cu. Ft. Per Hr.
with Pressure Drop of 0.3" and Specific Gravity of 0.60.
Table 8.
Iron pipe size (SI) millimeters
Length of Pipe
(Meters)
Iron Pipe Size (SI) Millimeters
15 mm
Pipe
20 mm
Pipe
25 mm
Pipe
32 mm
Pipe
40 mm
Pipe
4.6
2.15
4.98
9.76
21.23
34.54
9.1
1.47
3.39
6.82
15.14
24.06
13.7
1.21
2.80
5.63
12.31
19.82
18.3
1.07
2.43
4.89
10.76
17.27
22.9
—
2.18
4.38
9.76
15.40
Note:
Capacity of Pipe of Different Diameters and Lengths in Cu. Meter Per
Hr. with Pressure Drop of 74.6 Pa and Specific Gravity of 0.60.
Figure 68. Schematic diagram for field gas piping to
unit
1/8” NPT Test Plug
Field Supplied
Ground Union
6” Min
To Gas Train
Unit Access Hole
Drip Leg
Gas Supply Line
Gas Shutoff (Field Supplied
Outside Unit Cabinet)
