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Home » Products » Technical support » PPR pipe

Hydrostatic Pressure Performance of PPR pipe:
To plot the hydrostatic pressure performance graph (table 1) of dimensions independently, the hoop stress (α) is calculated according to this formula:
α= p (de-e)/2e
P=internal pressure
De=the external pipe diameter (mm)
e=the wall thickness of the pipe

For all water carrying pipes, resistance to internal pressure is an important factor, which affects service life. Therefore, in order to assure the optimum in long service life performance, straight and curved polygon pipes have been subjected to extensive hydrostatic pressure testing at a variety of different temperatures. The results of these tests can be seen in table 1.

Permissible Working Pressure of PPR pipe
The table lists the permissible working pressure for pipes with different pressure class under specific temperature and working life. The data is calculated from above formula and table 1.
Under normal working pressure and condition, the life of Polygon pipe line can reach 50 years at least.

Technical Data of PPR Pipe

Temperature Service life (Year) Pipe S 5 Pipe S 3.2 Pipe S 2.5
Pipe SDR 11 Pipe SDR 7.4 Pipe SDR 6
Pipe PN 10 Pipe PN 16 Pipe PN 20
Permissible working pressure (bar)
SF=1.25 SF=1.5 SF=1.25 SF=1.5 SF=1.25 SF=1.5
10℃ 1 21.1 17.6 33.4 27.8 42.0 35.0
5 20.0 16.6 31.6 26.4 39.8 33.2
10 19.3 16.1 30.6 25.5 38.5 32.1
25 18.7 15.6 29.6 24.7 37.3 31.1
50 18.2 15.2 28.8 24.0 36.3 30.3
100 17.7 14.8 28.1 23.4 35.4 29.5
20℃ 1 18.0 15.0 28.6 23.8 36.0 30.0
5 16.9 14.1 26.8 22.3 33.8 28.1
10 16.4 13.7 26.1 21.7 32.8 27.3
25 16.0 13.3 25.3 21.1 31.8 26.5
50 15.5 12.9 24.5 20.4 30.9 25.7
100 15.0 12.5 23.8 19.8 29.9 24.9
30℃ 1 15.3 12.8 23.4 20.2 30.6 25.5
5 14.4 12.0 22.8 19.0 28.7 23.9
10 13.9 11.6 22.0 18.3 27.7 23.1
25 13.4 11.2 21.3 17.3 26.8 22.3
50 13.1 10.9 20.7 17.1 26.1 21.8
100 12.8 10.6 20.2 16.9 25.5 21.2
40℃ 1 12.9 10.8 20.5 17.1 25.8 21.5
5 12.1 10.1 19.2 16.0 24.2 20.2
10 11.8 9.8 18.7 15.6 23.6 19.6
25 11.3 9.4 18.0 15.0 22.6 18.8
50 11.0 9.2 17.5 14.5 22.0 18.3
100 10.7 8.9 16.9 14.1 21.3 17.8
50℃ 1 11.0 9.2 17.5 14.5 22.0 18.3
5 10.2 8.5 16.2 13.5 20.4 17.0
10 9.9 8.2 15.7 13.1 19.7 16.5
25 9.6 8.0 15.2 12.6 19.1 15.9
50 9.3 7.7 14.7 12.2 18.5 15.4
100 8.9 7.4 14.2 11.8 17.8 14.9
60℃ 1 9.3 7.7 14.7 12.2 18.5 15.4
5 8.6 7.2 13.7 11.4 17.2 14.3
10 8.3 6.9 13.2 11.0 16.6 13.8
25 8.0 6.7 12.6 10.5 15.9 13.3
50 7.7 6.4 12.1 10.1 15.3 12.7
70℃ 1 7.8 6.5 12.4 10.3 15.6 13.0
5 7.2 6.0 11.4 9.5 14.3 11.9
10 7.0 5.9 11.1 9.3 14.0 11.7
25 6.1 5.1 9.6 8.0 12.1 10.1
50 5.1 4.3 8.1 6.7 10.2 8.5
80℃ 1 6.5 5.5 10.4 8.6 13.1 10.9
5 5.7 4.8 9.1 7.6 11.5 9.6
10 4.8 4.0 7.6 6.3 9.6 8.0
25 3.8 3.2 6.1 5.1 7.6 6.4
95℃ 1 4.6 3.9 7.3 6.1 9.2 7.7
5 3.0 2.5 4.8 4.0 6.1 5.0
10 2.6 2.1 4.0 3.4 5.1 4.2

SDR=Standard Dimension Ratio (diameter/wall thickness ratio)
SDR=2xS+1≈d/s (S=Pipe series index from ISO 4.65)
SF=Safety factor (Safety coefficient)