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.
2 3 10 09 4 the owner and designer are responsible for compliance with the personnel and process qualification requirements of the codes and standards.
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.
For pvc pipe the spacing depends on the pipe schedule and operating temperature.
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.
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.
In particular the application of asme b31 3 requires compliance with the inspector qualification.
Maximum spacing between supports at different temperatures can be found in the tables below.
Maximum support spacing feet nps.
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.
Approximately 1 ft more for schedule 80 and half that spacing at 150 f.
Spacing for vertical systems should usually be about two times the intervals in the table above.
These spacings do not allow for additional extraneous loadings.
Supports should at the very least be compliant with all codes and regulations you will face.
The basic principle for deciding the spacing the pipes running parallel to each other is.
However for the same class of pipes pvc o and pvc m will show increased deflection between the supports.
The table below from as nzs 2032 shows the support spacing in metres for pvc pipe carrying water at 20 c.
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.
Pvc pipe schedule 40.
Cpvc pipes schedule 40 cpvc pipes schedule 80.
Inches operating temperature of 60.
