Note : For PN25, stable pipes,the above can be obtained by dividing by 5
Step 2. Once the Linear Expansion is established, compensation for this expansion for this expansion
can be made by either an Expansion Elbow or Expansion Loop.
Pipe Length L(m)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.5
6.0
6.5
7.0
7.5
8.0
VESBO Pipe Diameter (mm)
10
20
30
40
50
60
70
0.15
0.30
0.45
0.60
0.75
0.90
1.05
0.30
0.60
0.90
1.20
1.50
1.80
2.10
0.45
0.90
1.35
1.80
2.25
2.70
3.15
0.60
1.20
1.80
2.40
3.00
3.60
4.20
0.75
1.50
2.25
3.00
3.75
4.50
5.25
0.90
1.80
2.70
3.60
4.50
5.40
6.30
1.05
2.10
3.15
4.20
5.25
6.30
7.35
1.20
2.40
3.60
4.80
6.00
7.20
8.40
1.35
2.70
4.05
5.40
6.75
8.10
9.45
1.50
3.00
4.50
6.00
7.50
9.00
10.50
2.25
4.50
6.75
9.00
11.25
13.50
15.75
3.00
6.00
9.00
12.00
15.00
18.00
21.00
3.75
7.50
11.25
15.00
18.75
22.50
26.25
4.50
9.00
13.50
18.00
22.50
27.00
31.50
5.25
10.50
15.75
21.00
26.25
31.50
36.75
6.00
12.00
18.00
24.00
30.00
36.00
42.00
6.75
13.50
20.25
27.00
33.75
40.50
47.25
8.25
16.50
24.75
33.00
41.25
49.50
57.75
9.00
18.00
27.00
36.00
45.00
54.00
63.00
9.75
19.50
29.25
39.00
48.75
58.50
68.25
10.50
21.00
31.50
42.00
25.50
63.00
73.50
11.25
22.50
33.75
45.00
56.25
67.50
78.75
12.00
24.00
36.00
48.00
60.00
72.00
84.00
FS=Fixed Support
SS=Sliding Support
EA=Elbow Arm
Formula to Determine the length of Elbow Arm EA:
EA = kx(dxrI)1/2
where k = constant, 15
rI = Linear expansion
d = pipe diameter
Note:In an elbow expansion joint the FS must be located at the EA section and the EA perpendicular to direction of expansion
Example
Pipe of diameter 25 mm length of 1.5m normal cold water temperature is 25oC and hot water from water heater is set at 60 oC.
EA = k x (dxr)1/2
= 15 x (25x8)1/2
= 212.13-212 mm
Expansion Loop. FS= Fixed Support SS=Sliding
Support EA=Elbow Arm
Formula to detrtmine the Loop Width LW
LW=(2xrI)+SW
Where SW=Safety Width,assigned as 150 mm
rI=Linear expansion
Not:In an expansion loop, the FS is located at the
pipe section of LW. All other pipe supports must be SS.Calculation of EA is the same as above Expansion elbow example.
Example:
Pipe of diameter 25 mm Length of 1.5 m normal cold water temperature is25oC and hot water from water heater is set at 60 oC
