9 3 2015 CALPEX district heating pipe CPX Subject to technical changes 1 110 Long term behaviour Lifetime calculation Long term behaviour table The values have a safety factor of 1 25 and are based on a series of measurements covering an average of 32 000 hours They can be compared with Table 5 as per DIN 16893 All values have been tested and confirmed by the competent organizations in various countries The max operating temperature is 95 C but considers a short term over temperature fault temperature of 110 C A typical fluctuating temperature distribution for the flow in a district heating system gives an average temperature year of approx 66 C Lifetime calculation using Miner s Rule Lifetime calculation for fluctuating operating temperatures will be calculated acc EN ISO 13760 Example of application The basis is a typical temperature collective over one year with fluctu ating operation gem EN 15632 2 1 year 365 days 8760 hours Operating Temperature C 95 90 85 80 75 70 65 60 total Example 1 Annual Operating time h 3 3 292 0 8468 0 0 0 0 8763 3 Example 2 Annual Operating time h 0 50 100 200 2000 2410 4000 0 8760 Example 3 Annual Operating time h 0 50 1000 3450 1000 0 0 0 5500 Operating temperature Heating pipe series 5 SDR 11 Sanitary pipe series 3 2 SDR 7 4 C Operating pressure bar Operating pressure bar 1 year 5 year 10 year 25 year 50 year 1 year 5 year 10 year 25 year 50 year 10 17 9 17 5 17 4 17 2 17 1 28 3 27 8 27 6 27 3 27 1 20 15 8 15 5 15 4 15 2 15 1 25 1 24 6 24 4 24 2 24 0 30 14 0 13 8 13 7 13 5 13 4 22 3 21 9 21 7 21 4 21 3 40 12 5 12 2 12 1 12 0 11 9 19 8 19 4 19 3 19 1 18 9 50 11 1 10 9 10 8 10 7 10 6 17 7 17 3 17 2 17 0 16 8 60 9 9 9 7 9 7 9 5 9 5 15 8 15 5 15 3 15 2 15 0 70 8 9 8 7 8 6 8 5 8 5 14 1 13 8 13 7 13 6 13 4 80 8 0 7 8 7 7 7 6 12 7 12 4 12 3 12 1 90 7 2 7 0 6 9 11 4 11 1 11 0 95 6 8 6 6 6 6 10 8 10 6 10 5 1 MPA 10 bar

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