Lanl engineering standards manual pd342 chapter 17 pressure safety section d20 b31 3 g asme b31 3 process piping guide rev.
Pvc pipe support spacing table standards.
Inches operating temperature of 60.
Pvc pipe schedule 40.
Spacing for vertical systems should usually be about two times the intervals in the table above.
Support spacing should be in accordance with applicable plumbing and building codes.
Horizontal and vertical support for cpvc pipe mostplumbing codesandbuilding requiresupportfor horizontal pipe lines every 3 feet for pipe in 1 2 1 diameters and every 4 feet for pipe with diameters greater than 1.
If you are working on an inspected job you will also need to be aware of any specific code requirements for pipe support in your area.
However for the same class of pipes pvc o and pvc m will show increased deflection between the supports.
The basic principle for deciding the spacing the pipes running parallel to each other is.
For pvc pipe the spacing depends on the pipe schedule and operating temperature.
Approximately 1 ft more for schedule 80 and half that spacing at 150 f.
The span is 4 ft for pipe up to 6 ft for 4 schedule 40 pipe at ambient temperature.
These spacings are also acceptable for pvc o and pvc m pipes.
Maximum spacing between supports at different temperatures can be found in the tables below.
Cpvc pipes schedule 40 cpvc pipes schedule 80.
In particular the application of asme b31 3 requires compliance with the inspector qualification.
Hangers supports for sch40 and sch80 pvc and cpvc pipe.
Maximum support spacing for cpvc chlorinated poly vinyl chloride pipes depends on the operating temperature.
Proper support selection and spacing is critical to prevent stress concentration areas as the result of weight loading bending stress the effects of thermal expansion contraction and to limit pipe displacement sag.
Maximum support spacing feet nps.
The table below from as nzs 2032 shows the support spacing in metres for pvc pipe carrying water at 20 c.
Center to center spacing 1 2 o d of the bigger size pipe flange insulation thickness of bigger size pipe if applicable 25 mm 1 2 o d of the smaller size pipe insulation thickness of smaller size pipe if applicable.
