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Maximum Spacing for PVC and CPVC Hanger Supports

Fluids Engineering and Design
Engineering Handware Design and Guidance

Suggested Maximum Spacing Between Hanger Supports for PVC and CPVC

Support spacings for PVC and CPVC pipe systems are influenced by operating temperatures. The tables below recommends horizontal spacing based on pipe size, schedule, material (PVC or industrial grade CPVC), and operating temperature. Hangers and supports should not be clamped tightly because the axial movement of the pipe would be restricted. The charts are based on continuous spans and uninsulated lines carrying liquids. They are not applicable where loads between supports are concentrated (e.g., for valves, flanges) or where there is a change in direction. Hangers/supports should be located adjacent to joints, branch connections, and changes in direction. Risers should be in installed independently of adjacent horizontal hangers/supports.

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Pipe
Size
(in)
PVC Pipe Schedule 40
Temperature (° F)
60
80
100
120
140
1/2
4-1/2
4-1/2
4
2-1/2
2-1/2
3/4
5
4-1/2
4
2-1/2
2-1/2
1
5-1/2
5
4-1/2
3
2-1/2
1-1/4
5-1/2
5-1/2
5
3
3
1-1/2
6
5-1/2
5
3-1/2
3
2
6
5-1/2
5
3-1/2
3
2-1/2
7
6-1/2
6
4
3-1/2
3
7
7
6
4
3-1/2
4
7-1/2
7
6-1/2
4-1/2
4
6
8-1/2
8
7-1/2
5
4-1/2
8
9
8-1/2
8
5
4-1/2
10
10
9
8-1/2
5-1/2
5
12
11-1/2
10-1/2
9-1/2
6-1/2
5-1/2
14
12
11
10
7
6
16
12-1/2
11-1/2
10-1/2
7-1/2
6-1/2
SDR
18
13
12
11
8
7
20
13-1/2
12-1/2
11-1/2
8-1/2
7-1/2
24
14
13
12
9
8

 

Pipe
Size
(in)
PVC Pipe Schedule 80
Temperature (° F)
60
80
100
120
140
1/2
5
4-1/2
4
3
2-1/2
3/4
5-1/2
5
4-1/2
3
2-1/2
1
6
5-1/2
5
3-1/2
3
1-1/4
6
6
5-1/2
3-1/2
3
1-1/2
6-1/2
6
5-1/2
3-1/2
3-1/2
2
7
6-1/2
6
4
3-1/2
2-1/2
7-1/2
67-1/2
6-1/2
4-1/2
4
3
8
7-1/2
7
4-1/2
4
4
9
8-1/2
7-1/2
5
4-1/2
6
10
9-1/2
9
6
5
8
11
10-1/2
9-1/2
6-1/2
5-1/2
10
12
11
10
7
6
12
13
12
10-1/2
7-1/2
6-1/2
14
13-1/2
13
11
8
7
16
14
13-1/2
11-1/2
8-1/2
7-1/2
SDR
18
14-1/2
14
12
9
8
20
15
14-1/2
12-1/2
9-1/2
8-1/2
24
15-1/2
15
13
10
9

 

Pipe
Size
(in)
CPVC Pipe Schedule 40
Temperature (° F)
73
100
120
140
160
180
1/2
5
4-1/2
4-1/2
4
2-1/2
2-1/2
3/4
5
5-1/2
5
4-1/2
3
2-1/2
1
5-1/2
5-1/2
5
4-1/2
3
2-1/2
1-1/4
5-1/2
5-1/2
5-1/2
5
3
3
1-1/2
6
6
5-1/2
5
3-1/2
3
2
6
6
5-1/2
5
3-1/2
3
2-1/2
7
7
6-1/2
6
4
3-1/2
3
7
7
7
6
4
3-1/2
4
7-1/2
7-1/2
7
6-1/2
4-1/2
4
6
8-1/2
8
7-1/2
7
5
4-1/2
8
9-1/2
9
8-1/2
7-1/2
5-1/2
5
10
10-1/2
10
9-1/2
8
6
5-1/2
12
11-1/2
10-1/2
10
8-1/2
6-1/2
6

 

Pipe
Size
(in)
CPVC Pipe Schedule 80
Temperature (° F)
73
100
120
140
160
180
1/2
5-1/2
5
4-1/2
4-1/2
3
2-1/2
3/4
5-1/2
5-1/2
5
4-1/2
3
2-1/2
1
6
6
5-1/2
5
3-1/2
3
1-1/4
6-1/2
6
6
5-1/2
3-1/2
3
1-1/2
7
6-1/2
6
5-1/2
3-1/2
3-1/2
2
7
7
6-1/2
6
4
3-1/2
2-1/2
8
7-1/2
7-1/2
6-1/2
4-1/2
4
3
8
8
7-1/2
7
4-1/2
4-1/2
4
8-1/2
9
8
7-1/2
5-1/2
4
6
10
9-1/2
9
8
5-1/2
5
8
11
10-1/2
10
9
6
5-1/2
10
11-1/2
11
10-1/2
9-1/2
6-1/2
6
12
12-1/2
12
11-1/2
10-1/2
7-1/2
6-1/2

Related:

References

  • ASHRAE Handbook of Fundamentals, 2021 Inch-Pound Edition

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