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Figure 27: Coiled Expansion Loops and Offsets (Plan View).
L
R
Large Tubing U-bend (>3/4 in.)
Table 53: Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets.
Anticipated Linear
Expansion (LE) (inches)
R
1
1/2
L
2
R
1
1
L
2
R
1
1-1/2
L
2
R
1
2
L
2
R
1
2-1/2
L
2
R
1
3
L
2
R
1
3-1/2
L
2
R
1
4
L
2
1
R = Centerline Length of Pipe.
2
L = Centerline Minimum Radius (inches).
All expansion Loops and Offsets should be installed in the horizontal plane to prevent the possibility of trapping oil. Loops and Offsets in verti-
cal risers should also be installed in a horizontal plane.
L
1/4
3/8
6
7
38
44
9
10
54
63
11
12
66
77
12
14
77
89
14
16
86
99
15
17
94
109
16
19
102
117
17
20
109
126
©
LAYOUT BEST PRACTICES
Selecting Field-Supplied Copper Tubing
R
Loop
Nominal Tube Size (OD) inches
1/2
3/4
8
9
50
59
11
13
70
83
14
16
86
101
16
19
99
117
18
21
111
131
19
23
122
143
21
25
131
155
22
26
140
166
L
Small Tubing U-bend (<3/4 in.)
1
1-1/4
11
12
67
74
15
17
94
104
18
20
115
127
21
23
133
147
24
26
149
165
26
29
163
180
28
31
176
195
30
33
188
208
1-1/2
13
80
18
113
22
138
25
160
29
179
31
196
34
212
36
226
| 139

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