Loss of structural integrity due to higher temperatures

Technical data always refer to measurements at 68° F. At higher temperatures these values are reduced due to increasing softening:

Residual strength at a temperature of

Soft PVC

Pre-PUR®

Pre-PUR® HT

68° F 100% 100% 100%
86° F 70% 90% 95%
104° F 50% 80% 90%
122° F 30% 70% 85%
140° F 50% 75%
158° F 30% 60%
212° F 20% 40%
257° F 10% 20%
302° F 10%

These factors should be taken into account for loads in the overpressure range.
Example: Operating limit for PU material at 104° F:

ptol(104° F) = ptol(68° C) × 80 %

nach oben