Figure 28: Coiled Expansion Loops and Offsets (Plan View).
L
R
Large Tubing U-bend (>3/4 in.)
All expansion loops and offsets must be installed in the horizontal plane to prevent the possibility of trapping oil. Loops and offsets in vertical risers
must also be installed in a horizontal plane.
Table 19: Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets.
Anticipated Linear
Expansion (LE) (in.)
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
R = Centerline Length of Pipe.
1
2
40
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
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