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Figure 50: Coiled Expansion Loops and Offsets.
L
L
R
R
Large Tubing U-bend (>3/4 in.)
Table 44: Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets.
Anticipated Linear Expansion (LE) (inches)
1/2
1
1-1/2
2
2-1/2
3
3-1/2
4
R = Centerline Length of Pipe.
1
L = Centerline Minimum Radius (inches).
2
Table 43: Linear Thermal Expansion of Copper Tubing in Inches.
Pipe
Length
35°
40°
45°
1
10
0.04
0.04
0.05
20
0.08
0.08
0.10
30
0.12
0.12
0.15
40
0.16
0.16
0.20
50
0.20
0.20
0.25
60
0.24
0.24
0.30
70
0.28
0.28
0.35
80
0.32
0.32
0.40
90
0.36
0.36
0.45
100
0.40
0.40
0.50
120
0.48
0.48
0.60
140
0.56
0.56
0.70
160
0.64
0.64
0.80
180
0.72
0.72
0.90
200
0.80
0.80
1.00
220
0.88
0.88
1.10
240
0.96
0.96
1.20
260
1.04
1.04
1.30
280
1.12
1.12
1.40
Pipe length baseline temperature = 0°F. "Expansion of Carbon, Copper and Stainless Steel Pipe," The Engineers' Toolbox, www.engineeringtoolbox.com.
1
L
L
L
R
R
1/4
R
6
1
L
38
2
R
9
1
L
54
2
R
11
1
L
66
2
R
12
1
L
77
2
R
14
1
L
86
2
R
15
1
L
94
2
R
16
1
L
102
2
R
17
1
L
109
2
50°
55°
60°
65°
70°
0.06
0.06
0.07
0.08
0.08
0.12
0.13
0.14
0.15
0.16
0.18
0.20
0.21
0.23
0.24
0.24
0.26
0.28
0.30
0.32
0.30
0.33
0.35
0.38
0.40
0.36
0.39
0.42
0.45
0.48
0.42
0.46
0.49
0.53
0.56
0.48
0.52
0.56
0.60
0.64
0.54
0.59
0.63
0.68
0.72
0.60
0.65
0.70
0.75
0.80
0.72
0.78
0.84
0.90
0.96
0.84
0.91
0.98
1.05
1.12
0.96
1.04
1.12
1.20
1.28
1.08
1.17
1.26
1.35
1.44
1.20
1.30
1.40
1.50
1.60
1.32
1.43
1.54
1.65
1.76
1.44
1.56
1.68
1.80
1.92
1.56
1.69
1.82
1.95
2.08
1.68
1.82
1.96
2.10
2.24
Due to our policy of continuous product innovation, some specifications may change without notification.
©
LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
REFRIGERANT PIPING DESIGN
Selecting Field-Supplied Copper Tubing
L
R
R
L
Loop
Nominal Tube Size (OD) inches
3/8
7
44
10
63
12
77
14
89
16
99
17
109
19
117
20
126
Fluid Temperature °F
75°
80°
85°
90°
95° 100° 105° 110° 115° 120° 125° 130°
0.09
0.09
0.10
0.10
0.11
0.17
0.18
0.19
0.20
0.21
0.26
0.27
0.29
0.30
0.32
0.34
0.36
0.38
0.40
0.42
0.43
0.45
0.48
0.50
0.53
0.51
0.54
0.57
0.60
0.63
0.60
0.63
0.67
0.70
0.74
0.68
0.72
0.76
0.80
0.84
0.77
0.81
0.86
0.90
0.95
0.85
0.90
0.95
1.00
1.05
1.02
1.08
1.14
1.20
1.26
1.19
1.26
1.33
1.40
1.47
1.36
1.44
1.52
1.60
1.68
1.53
1.62
1.71
1.80
1.89
1.70
1.80
1.90
2.00
2.10
1.87
1.98
2.09
2.20
2.31
2.04
2.16
2.28
2.40
2.52
2.21
2.34
2.47
2.60
2.73
2.38
2.52
2.66
2.80
2.94
L
L
Small Tubing U-bend (<3/4 in.)
1/2
8
50
11
70
14
86
16
99
18
111
19
122
21
131
22
140
0.11
0.11
0.12
0.13
0.14
0.22
0.22
0.23
0.26
0.28
0.33
0.32
0.35
0.39
0.42
0.44
0.43
0.46
0.52
0.56
0.55
0.54
0.58
0.65
0.70
0.66
0.65
0.69
0.78
0.84
0.77
0.76
0.81
0.91
0.98
0.88
0.86
0.92
1.04
1.12
0.99
0.97
1.04
1.17
1.26
1.10
1.08
1.15
1.30
1.40
1.32
1.30
1.38
1.56
1.68
1.54
1.51
1.61
1.82
1.96
1.76
1.73
1.84
2.08
2.24
1.98
1.94
2.07
2.34
2.52
2.20
2.16
2.30
2.60
2.80
2.42
2.38
2.53
2.86
3.08
2.64
2.59
2.76
3.12
3.36
2.86
2.81
2.99
3.38
3.64
3.08
3.02
3.22
3.64
3.92
INTRODUCTION | 69
3/4
9
59
13
83
16
101
19
117
21
131
23
143
25
155
26
166
0.15
0.15
0.29
0.30
0.44
0.45
0.58
0.60
0.73
0.75
0.87
0.90
1.02
1.05
1.16
1.20
1.31
1.35
1.45
1.50
1.74
1.80
2.03
2.10
2.32
2.40
2.61
2.70
2.90
3.00
3.19
3.30
3.48
3.60
3.77
3.90
4.06
4.20
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