Longitudional Reversion Testing

Longitudional Reversion Testing is the testing of Plastic pipes for their elastic properties which enable them to revert to their original shape & aleignment after having a load removed from them.(such a load may include wind loading, snow loading, or hydrostatic loading)

Approximate Method: Hydrostatic Testing -(1) Fill the Pipeline with water, -(2) Use the valves on the line to bleed out all air and gas from the pipeline as it fills with water, -(3) See what happens.You should

               -Check for Leaks (position & leak rate, if any),
               - check for Sagging (depth of sag),
               -Check for bulging, check for deformation]

Defn: Longitudional Reversion Testing - [ Upon removing a load placed upon a Pipe. Look to

               see how the pipe responds to the load removal,in terms of
               longitudional deformation, sagging. Check to see if
               the pipe quickly springs back into shape 
               [indicates good elastic properites and tensile strength].
                Also check to see the speed at which this reversion occurs.
               
               I.e.The time it, from the moment the load is removed until
                the pipe has finished reverting back to its original 
               shape and aliegnment.

References:

"Guidelines for Engineering Design for Process Safety",Center for Chemical Process Safety © 1993 Center for Chemical Process Safety/AIChE [Also available on Knovel the online library[http://www.Knovel.com]