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Deflection of plastic pipe

Kevin Chiu

Mechanical
Joined
May 13, 2025
Messages
2
Hello everyone, I would like to ask about deflection limits for plastic piping.

I have a project where I used pipe stress analysis software to evaluate the stresses in a PPH pipe with a diameter of d160.

The simulation results show that the utilization is within the allowable limits. However, the calculated deflection is slightly higher than the DVS guideline (15 mm > 5 mm (L/150) ).

May I ask, if the stresses are acceptable but the deflection does not meet the guideline, what kinds of problems could this cause? Thank you for your feedback.
 

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