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Technical Guide - Support Spacing - Aquarius

PVC SCHEDULE 40 & SCHEDULE 80 PRESSURE PIPES AND FITTINGS SUPPORT SPACING FOR PVC PIPE


Adequate supports for any piping system is a matter of great importance. In practice, support spacings are a function of pipe size operating temperatures, the location of heavy valves or fittings and the mechanical properties of the pipe material.


To ensure the satisfactory operation of a Astral PVC piping system the location and type of hangers should be carefully considered. Hangers should not compress, distort, cut or abrade the piping.


All piping should be supported with an approved hanger at intervals sufficiently close to maintain correct pipe alignment and to prevent sagging or geade reversal. Pipe should also be supported at all branch ends and at all changes of direction. Support trap arms as close as possible to the trap. In keeping with good plumbing practices support and brace all closet bends and fasten closet flanges.
  1. Concentrated loads should be supported directly so as to eliminate high stress concentrations. Should this be impractical then the pipe must be supported immediately adjacent to the load.


    NOTE : The above information provides general guidelines. It should be used only as a reference and not as a guarantee of performance. Specific installation instructions and techniques may be required as a result of local plumbing and building codes, engineering specifications and instructions.


  2. In systems where large fluctuations in temperature occur, allowances must be made for expansion and contraction of the piping system. Since changes in direction in the system are usually sufficient to allow for expansion and contraction hangers must be placed so as not to restrict this movement.


  3. Since plastic pipe expand or contracts approximately five times greater than those of steel, hangers should not restrict this movement.


  4. Hangers should provide as much bearing surface as possible. To prevent damage to the pipe, file smooth any sharp edges or burrs 011the hangers or supports.


  5. Support spacing for horizontal piping systems is determined by the maximum operating temperature the system will encounter. The piping should be supported on uniform centers with supports that do not restrict the axial movement.


  6. For vertical lines, it is recommended that an engineer design the vertical supports according to the vertical load involved.
Schedule - 40
Recommended Support spacing (in feet)		 Schedule - 80
Recommended Support spacing (in feet)
Nominal Pipe Size Temperature°C
(In) mm 15.5 26.6 37.7 48.8 60
1/2 15 4 1/2 4 1/2 4 2 1/2 2 1/2
3/4 20 5 4 1/2 4 2 1/2 2 1/2
1 25 5 1/2 5 4 1/2 3 2 1/2
1 1/4 32 5 1/2 5 1/2 5 3 3
1 1/2 40 6 5 1/2 5 3 1/2 3
2 50 6 5 1/2 5 3 1/2 3
2 1/2 63 6 1/2 6 5 1/2 4 3 1/2
3 75 7 7 6 4 3 1/2
4 100 7 1/2 7 6 1/2 4 1/2 4
6 150 8 1/2 8 7 1/2 5 4 1/2
Nominal Pipe Size Temperature°C
(In) mm 15.5 26.6 37.7 48.8 60
1/2 15 5 4 1/2 4 1/2 3 2 1/2
3/4 20 5 1/2 5 4 1/2 3 2 1/2
1 25 6 5 1/2 5 3 1/2 3
1 1/4 32 6 6  5 1/2 3 1/2 3
1 1/2 40 6 1/2 6 5 1/2 3 1/2 3 1/2
2 50 7 6 1/2 6 4 3 1/2
2 1/2 63 7 1/2 7 1/2 6 1/2 4 1/2 4
3 75 8 7 1/2 7 4 1/2 4
4 100 9 8 1/2 7 1/2 5 4 1/2
6 150 8 1/2 8 7 1/2 5 4 1/2
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