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Tabel 1. Temperature profile during 50 years
| Temperature [ ºC] | Time | Overall service coefficient | |
| Tcold | 20 | 14 years | 1,25 |
| Tdesign | 60+80 | 25 years+10 years | 1,5 |
| Tmax | 90 | 1 years | 1,3 |
| T malfunction | 100 | 100 hours | 1,0 |
| Remark: the mentioned temperature profile is in accordance with class 5 of ISO 10508. |
PE-RTl piping systems for radiator connections which are designed according class 5 may also be used for class 4 floorheating systems.
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