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technical data
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195
PIPE SUPPORT
When designing the hangers, supports and anchors for a groovedend pipe
system, the piping designer must consider certain unique characteristics of
the grooved type coupling in addition to many universal pipe hanger and
support design factors. As with any pipe system, the hanger or support
system must provide for
1) the weight of the pipe, couplings, fuid and pipe system components;
2) reduce stresses at pipe joints; and
3) permit required pipe system movement to relieve stress.
The following factors should be considered when designing hangers and
supports for a grooved-end pipe system.
PIPE HANGER SPACING:
The following charts show the maximum span between pipe hangers for
straight runs of standard weight steel pipe flled with water or other similar
fuids.
Do not use these values where critical span calculations are made or where
there are concentrated loads between supports.
For straight runs without
concentrated loads and where
full linear movement is
NOT
required use the table on right.
For straight runs without concentrated loads and where full linear
movement
IS
required use the following tables.
* Spacing by ANSI-B31.1 Power Piping Code.
** Spacing by ANSI-B31.9 Building Service Piping Code, (1996 Edition), Fig. 921.1.3c, Table a, 250
psi and Fig. 921.1.3D, table a
*** Spacing by NFPA-13 Installation of Sprinkler Systems, (1999 Edition), Table 6-2.2.
HANGER SPACING - RIGID SYSTEMS
SUGGESTED MAXIMUM SPAN BETWEEN SUPPORTS
Nominal
Size
Steel Pipe Suggested Maximum Span
Between Supports-Feet/Meters
Copper Tube
Water
Service
Gas & Air
Service
Water Service
Air Service
In./DNmm *
**
***
*
**
***
**
**
1
7
9
12
9
10 12
–
–
25
2.1
2.7
3.7
2.7
3.0
3.7
1
1
/
4
7
11 12
9
12 12
–
–
32
2.1
3.4
3.7
2.7
3.6
3.7
1
1
/
2
7
12 15
9
13 15
–
–
40
2.1
3.7
4.6
2.7
4
4.6
2
10 13 15 13 15 15
9
12
50
3
4
4.6
4
4.6
4.6
2.7
3.6
2
1
/
2
11 15 15 14 17 15
9
12
65
3.4
4.6
4.6
4.3
5.1
4.6
2.7
3.6
3 O.D.
11
15
15
14
17
15
–
–
76.1 3.4 4.6 4.6 4.3 5.1 4.6
3
12 16 15 15 19 15
10
14
80
3.7
4.8
4.6
4.6
5.7
4.6
3
4.2
3
1
/
2
13 18 15 15 21 15
–
–
90
4
5.4
4.6
4.6
6.3
4.6
4
14 18 15 17 21 15
12
17
100
4.3
5.4
4.6
5.2
6.4
4.6
3.7
5.1
4
1
/
4
O.D.
14
18
15
17
19
15
–
–
108.0 4.3 5.4 4.6 5.2 5.7 4.6
5
16 20 15 20 24 15
13
18
125
4.9
6.0
4.6
6.1
7.3
4.6
4
5.7
5
1
/
4
O.D.
15
18
15
19
22
15
–
–
133.0 4.6 5.5 4.6 5.2 6.6 4.6
5
1
/
2
O.D.
16
19
15
20
24
15
–
–
139.7 4.9 5.8 4.6 6.1 7.3 4.6
6
17 21 15 21 26 15
14
21
150
5.2
6.3
4.6
6.4
7.8
4.6
4.2
6.3
6
1
/
4
O.D.
16
20
15
20
24
15
–
–
159.0 4.9 6.0 4.6 6.1 7.3 4.6
6
1
/
2
O.D.
17
21
15
21
25
15
–
–
165.1 5.2 6.3 4.6 6.4 7.6 4.6
8
19 23 15 24 29 15
–
–
200
5.8
6.9
4.6
7.3
8.7
4.6
10
19 25 15 24 33 15
–
–
250
5.8
7.5
4.6
7.3
9.9
4.6
12
23 26 15 30 36 15
–
–
300
7
7.8
4.6
9.1 10.8 4.6
14
23 26 15 30 37 15
–
–
350
7
7.8
4.6
9.1 11.1 4.6
16
27 26 15 35 40 15
–
–
400
8.2
7.8
4.6 10.7 12.0 4.6
18
27 27 15 35 42 15
–
–
450
8.2
8.1
4.6 10.7 12.6 4.6
20
30 27 15 39 45 15
–
–
500
9.1
8.1
4.6 11.9 13.5 4.6
24
32 26 15 42 48 15
–
–
600
9.8
7.8
4.6 12.8 14.7 4.6
HANGER SPACING - FLEXIBLE SYSTEM, STEEL PIPE
FULL LINEAR MOVEMENT IS REQ’D
AVERAGE HANGERS PER PIPE LENGTH EVENLY SPACED
Nominal Pipe
Size Range
Pipe Length in Feet/Meters
In.
7
10
12
15
20
22
25
30
35
40
DNmm
2.1 3.3 3.7 4.6 6.1 6.7 7.6 9.1 10.7 12.2
1-2
1 2 2 2 3 3 4 4 5 6
25-50
2
1
/
2
-4
1 1 2 2 2 2 2 3 4 4
65-100
5-24
1 1 1 2 2 2 2 3 3 3
125-600
HANGER SPACING LINEAR
MOVEMENT NOT REQ’D
Nominal Pipe
Size Range
Maximum Span
Between Supports
In./DNmm
Feet/meters
1
7
25
2.1
1
1
/
4
-2
10
32-50
3.0
2
1
/
2
-4
12
65-100
3.7
5-8
14
125-200
4.3
10-12
16
250-300
4.9
14-16
18
350-400
5.5
18-24
20
450-600
6.1
GL-2.10