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Loss of strength due to higher temperatures

Technical data always refer to measurements at 20° C. At higher temperatures these values are reduced due to increasing softening:

Residual strength at a temperature of

Soft PVC

Pre-PUR®

Pre-PUR® HT

20° C 100% 100% 100%
30° C 70% 90% 95%
40° C 50% 80% 90%
50° C 30% 70% 85%
60° C 50% 75%
70° C 30% 60%
100° C 20% 40%
125° C 10% 20%
150° C 10%

These factors should be taken into account for loads in the overpressure range.
Example: Operating limit for PU material at 40° C:

ptol(40° C) = ptol(20° C) × 80 %

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