PVC pipes are tested for impact resistance primarily by the falling weight method, which simulates impact loads rather than Charpy or Izod tests. The test conditions vary by temperature (ambient to -20°C), tup weight, and radius, affecting contact pressure and damage likelihood.
Influence of Temperature and Tup Geometry
Lower temperatures approach the ductile-to-brittle transition, reducing energy absorption capacity. Larger tup radius lowers contact pressure, decreasing initial damage probability. Optimal molecular network formation during processing enhances impact resistance.
FAQ Section
What is the primary method for impact testing PVC pipes?
The falling weight test is the primary method for PVC pipe impact resistance evaluation.
How does temperature affect impact test results?
Lower temperatures reduce ductility and energy absorption, making it harder to pass the impact test.
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Gerrit Jan Wilpshaar
