61
I-800
Table IV
Expansion Loop Length in Inches
Nominal
Pipe
Size
Avg.
O.D.
Length of Run in Feet
5
10
15
20
25
30
35
40
45
50
70
90
120 160
Length of Loop (inches)
Temperature = 30°F - 100°F
Δ
T = 70°F
3
/
4
1.050
7
10
13
15
16
18
19
21
22
23
27
31
36
41
1
1.315
8
11
14
16
18
20
22
23
24
26
30
34
40
46
1
1
/
4
1.660
9
13
16
18
20
22
24
26
27
29
34
39
45
52
1
1
/
2
1.900
10
14
17
20
22
24
26
28
29
31
37
41
48
55
2
2.375
11
15
19
22
24
27
29
31
33
35
41
46
54
62
Note:
Table IV is based on Stress & Modulus of Elasticity @ 100°F.
l
=
l
= Length of Expansion Loop in Inches
E = Modulus of Elasticity at 100°F (Table I)
D = Average O.D. of Pipe
Δ
L = Change in Length of Pipe Due to Change in Temperature (Table III)
S = Working Stress at 100°F (Table I)
3
ED L
)
Δ
2
S
----------------------
I-800 2755 Rev_I.fm Page 61 Tuesday, September 13, 2005 8:46 AM