Planning & Calculation
Permissible working pressure
Using aquatherm PP-R-pipes for heating or air conditioning applications the pressure- and temperature conditions according to table “Permissible Working Pressure” are valid. The following table shows the operating conditions related to pressure and temperature as a basis for pipe and pipe connections. These figures refer to potable water installations based on a theoretical service life of 50 years.
Working pressure |
Temperature | Years of service | |
bar | °C | h/a | |
Potable water (cold) |
0 bis 10
transient |
to 25* | 8760 |
Potable water (warm) |
0 bis 10
transient |
to 60
to 85 |
8710
50 |
The determination of the allowable pressures resulted from the specific conditions to which pipe system components in the drinking water domestic installation are exposed to.
Limiting factors such as increased flow rates, the use of disinfectants, increased content of oxygen, etc. were considered by the use of the appropriate safety factors.
For fittings of butt-welded pipe segments a reduction factor of 0.75 (reduction of the table values by 25 %) is effective.
Permissible working pressure
for potable water application (Fluid transported: water acc. to DIN 2000)
Temperature | Years of service | aquatherm green pipe SDR 11 S |
aquatherm green pipe SDR 7,4 S |
aquatherm green pipe SDR 6 S |
aquatherm green pipe SDR 7,4 MF |
aquatherm green pipe SDR 9 MF RP |
20°C | Permissible working pressure in bar | |||||
1 | 15,00 | 23,80 | 30,00 | 28,60 | 25,00 | |
5 | 14,10 | 22,30 | 28,10 | 26,80 | 24,20 | |
10 | 13,70 | 21,70 | 27,30 | 26,10 | 23,90 | |
25 | 13,30 | 21,10 | 26,50 | 25,30 | 23,50 | |
50 | 12,90 | 20,40 | 25,70 | 24,50 | 23,10 | |
30°C | 1 | 12,80 | 20,20 | 25,50 | 24,30 | 21,70 |
5 | 12,00 | 19,00 | 23,90 | 22,80 | 21,00 | |
10 | 11,60 | 18,30 | 23,10 | 22,00 | 20,60 | |
25 | 11,20 | 17,70 | 22,30 | 21,30 | 20,20 | |
50 | 10,90 | 17,30 | 21,80 | 20,70 | 20,00 | |
40°C | 1 | 17,10 | 21,50 | 20,50 | 18,70 | |
5 | 16,00 | 20,20 | 19,20 | 18,00 | ||
10 | 15,60 | 19,60 | 18,70 | 17,70 | ||
25 | 15,00 | 18,80 | 18,00 | 17,40 | ||
50 | 14,50 | 18,30 | 17,50 | 17,00 | ||
50°C | 1 | 14,50 | 18,30 | 17,50 | 15,90 | |
5 | 13,50 | 17,00 | 16,20 | 15,30 | ||
10 | 13,10 | 16,50 | 15,70 | 15,10 | ||
25 | 12,60 | 15,90 | 15,20 | 14,80 | ||
50 | 12,20 | 15,40 | 14,70 | 14,50 | ||
60°C | 1 | 12,20 | 15,40 | 14,70 | 13,50 | |
5 | 11,40 | 14,30 | 13,70 | 13,00 | ||
10 | 11,00 | 13,80 | 13,20 | 12,80 | ||
25 | 10,50 | 13,30 | 12,60 | 12,50 | ||
50 | 10,10 | 12,70 | 12,10 | 12,30 | ||
65°C | 1 | 11,60 | 14,60 | 13,90 | 12,40 | |
5 | 10,80 | 13,60 | 12,90 | 11,90 | ||
10 | 10,40 | 13,10 | 12,50 | 11,70 | ||
25 | 10,00 | 12,60 | 12,00 | 11,40 | ||
50 | 8,80 | 11,10 | 10,60 | 11,20 | ||
70°C | 1 | 10,30 | 13,00 | 12,40 | 11,40 | |
5 | 9,50 | 11,90 | 11,40 | 10,90 | ||
10 | 9,30 | 11,70 | 11,10 | 10,70 | ||
25 | 8,00 | 10,10 | 9,60 | 10,50 | ||
30 | 7,00 | 8,80 | 9,30 | 10,30 | ||
50 | 6,70 | 8,50 | 8,10 | 10,20 | ||
SDR = Standard Dimension Ratio (diameter/wall thickness ratio)
S = Single layer
MF = Multilayer faser
MF RP = Multilayer faser – raised pressure (resistance)
The determination of the allowable pressures resulted from the specific conditions to which pipe system components in the drinking water domestic installation are exposed to.
Limiting factors such as increased flow rates, the use of disinfectants, increased content of oxygen, etc. were considered by the use of the appropriate safety factors.
For fittings of butt-welded pipe segments a reduction factor of 0.75 (reduction of the table values by 25 %) is effective.
Permissible working pressure
For heating systems or closed systems considering the seasonal periods of operation – non potable water application
Heating period | Temperature | Years of service | aquatherm blue pipe SDR 11 MF, OT & S |
aquatherm blue pipe SDR 17,6 MF |
aquatherm green pipe SDR 7,4 MF |
aquatherm green pipe SDR 9 MF RP |
Permissible working pressure in bar | ||||||
Constant operating temperature 70 °C incl. 30 days per year |
75 | 5,00 | 9,38 | 5,38 | 14,27 | 12,90 |
10,00 | 9,08 | 5,21 | 13,79 | 12,60 | ||
25,00 | 7,82 | 4,48 | 11,74 | 12,20 | ||
45,00 | 6,77 | 3,89 | 10,18 | 12,00 | ||
80 | 5,00 | 8,88 | 5,09 | 13,50 | 11,70 | |
10,00 | 8,46 | 4,86 | 12,80 | 11,40 | ||
25,00 | 7,38 | 4,24 | 11,14 | 11,10 | ||
42,50 | 6,49 | 3,72 | 9,79 | 10,90 | ||
85 | 5,00 | 8,17 | 4,69 | 12,42 | 10,70 | |
10,00 | 7,82 | 4,49 | 11,87 | 10,40 | ||
25,00 | 6,70 | 3,85 | 10,14 | 10,10 | ||
37,50 | 6,07 | 3,49 | 9,18 | 10,00 | ||
90 | 5,00 | 7,50 | 4,30 | 11,39 | 9,80 | |
10,00 | 7,19 | 4,13 | 10,94 | 9,50 | ||
25,00 | 5,85 | 3,36 | 8,86 | 9,20 | ||
35,00 | 5,39 | 3,09 | 8,16 | 9,10 | ||
Constant operating temperature 70 °C incl. 60 days per year |
75 | 5,00 | 9,26 | 5,31 | 14,11 | 12,30 |
10,00 | 8,90 | 5,11 | 13,57 | 12,10 | ||
25,00 | 7,62 | 4,37 | 11,58 | 11,70 | ||
45,00 | 6,60 | 3,79 | 10,05 | 11,50 | ||
80 | 5,00 | 8,61 | 4,94 | 13,12 | 11,40 | |
10,00 | 8,24 | 4,73 | 12,54 | 11,20 | ||
25,00 | 6,93 | 3,98 | 10,56 | 10,80 | ||
40,00 | 6,18 | 3,55 | 9,41 | 10,70 | ||
85 | 5,00 | 7,91 | 4,54 | 12,03 | 10,40 | |
10,00 | 7,56 | 4,34 | 11,52 | 10,20 | ||
25,00 | 6,05 | 3,47 | 9,22 | 9,90 | ||
35,00 | 5,57 | 3,20 | 8,48 | 9,80 | ||
90 | 5,00 | 7,25 | 4,16 | 11,04 | 9,50 | |
10,00 | 6,40 | 3,67 | 9,76 | 9,30 | ||
25,00 | 5,12 | 2,94 | 7,81 | 9,10 | ||
30,00 | 4,90 | 2,81 | 7,46 | 9,00 | ||
Constant operating temperature 70 °C incl. 90 days per year |
75 | 5,00 | 9,17 | 5,26 | 14,02 | 12,20 |
10,00 | 8,79 | 5,04 | 13,38 | 12,00 | ||
25,00 | 7,45 | 4,27 | 11,33 | 11,60 | ||
45,00 | 6,45 | 3,7 | 9,82 | 11,40 | ||
80 | 5,00 | 8,46 | 4,85 | 12,90 | 11,30 | |
10,00 | 8,11 | 4,65 | 12,35 | 11,00 | ||
25,00 | 6,60 | 3,78 | 10,05 | 10,70 | ||
37,50 | 5,98 | 3,43 | 9,09 | 10,60 | ||
85 | 5,00 | 7,76 | 4,45 | 11,81 | 10,30 | |
10,00 | 7,03 | 4,04 | 10,72 | 10,10 | ||
25,00 | 5,63 | 3,23 | 8,58 | 9,80 | ||
32,50 | 5,28 | 3,03 | 8,03 | 9,70 | ||
90 | 5,00 | 6,96 | 3,99 | 10,59 | 9,40 | |
10,00 | 5,88 | 3,37 | 8,96 | 9,20 | ||
25,00 | 4,70 | 2,70 | 7,17 | 8,90 |
SDR = Standard Dimension Ratio (diameter/wall thickness ratio)
S = Single layer
MF = Multilayer faser
MF RP = Multilayer faser – raised pressure (resistance)
The determination of the allowable pressures resulted from the specific conditions to which pipe system components in the drinking water domestic installation are exposed to.
Limiting factors such as increased flow rates, the use of disinfectants, increased content of oxygen, etc. were considered by the use of the appropriate safety factors.
For fittings of butt-welded pipe segments a reduction factor of 0.75 (reduction of the table values by 25 %) is effective.
Permissible working pressure
for general pressure pipe applications in permanent operation
Temperature | Years of service | aquatherm blue pipe SDR 17,6 MF |
aquatherm blue pipe SDR 11 MF, OT & S |
aquatherm green pipe SDR 7,4 MF |
aquatherm green pipe S DR 9 MF RP |
Permissible working pressure in bar | |||||
10°C | 1 | 12,80 | 27,80 | 30,20 | 28,80 |
5 | 12,00 | 26,20 | 28,20 | 27,90 | |
10 | 11,70 | 25,60 | 27,70 | 27,50 | |
25 | 11,40 | 24,70 | 26,90 | 27,10 | |
50 | 11,10 | 24,10 | 26,10 | 26,70 | |
100 | 10,80 | 23,50 | 25,20 | 26,30 | |
15°C | 1 | 11,80 | 25,70 | 29,40 | 26,90 |
5 | 11,10 | 24,20 | 27,40 | 26,00 | |
10 | 10,80 | 23,60 | 26,90 | 25,70 | |
25 | 10,50 | 22,80 | 26,10 | 25,20 | |
50 | 10,20 | 22,20 | 25,30 | 24,90 | |
100 | 9,90 | 21,60 | 24,50 | 24,50 | |
20°C | 1 | 10,90 | 23,80 | 28,60 | 25,00 |
5 | 10,30 | 22,30 | 26,80 | 24,20 | |
10 | 10,00 | 21,70 | 26,10 | 23,90 | |
25 | 9,60 | 21,00 | 25,30 | 23,50 | |
50 | 9,40 | 20,40 | 24,50 | 23,10 | |
100 | 9,10 | 19,90 | 23,70 | 22,80 | |
30°C | 1 | 9,30 | 20,20 | 24,30 | 21,70 |
5 | 8,70 | 18,90 | 22,80 | 20,90 | |
10 | 8,50 | 18,40 | 22,00 | 20,60 | |
25 | 8,20 | 17,80 | 21,30 | 20,20 | |
50 | 7,90 | 17,30 | 20,70 | 19,90 | |
100 | 7,70 | 16,80 | 20,00 | 19,70 | |
40°C | 1 | 7,90 | 17,20 | 20,50 | 18,60 |
5 | 7,40 | 16,00 | 19,20 | 18,00 | |
10 | 7,20 | 15,60 | 18,70 | 17,70 | |
25 | 6,90 | 15,00 | 18,00 | 17,30 | |
50 | 6,70 | 14,60 | 17,50 | 17,10 | |
100 | 6,50 | 14,10 | 16,80 | 16,80 | |
50°C | 1 | 6,70 | 14,50 | 17,50 | 15,90 |
5 | 6,20 | 13,50 | 16,20 | 15,30 | |
10 | 6,00 | 13,10 | 15,70 | 15,10 | |
25 | 5,80 | 12,60 | 15,20 | 14,70 | |
50 | 5,60 | 12,20 | 14,70 | 14,50 | |
100 | 5,50 | 11,90 | 14,10 | 14,30 | |
60°C | 1 | 5,60 | 12,20 | 14,70 | 13,50 |
5 | 5,20 | 11,40 | 13,70 | 13,00 | |
10 | 5,10 | 11,00 | 13,20 | 12,70 | |
25 | 4,90 | 10,60 | 12,60 | 12,40 | |
50 | 4,70 | 10,30 | 12,10 | 12,20 | |
70°C | 1 | 4,70 | 10,30 | 12,40 | 11,30 |
5 | 4,40 | 9,60 | 11,40 | 10,90 | |
10 | 4,20 | 9,20 | 11,10 | 10,70 | |
25 | 3,70 | 8,00 | 9,60 | 10,40 | |
50 | 3,10 | 6,80 | 8,10 | 10,20 | |
75°C | 1 | 4,30 | 9,40 | 11,70 | 10,40 |
5 | 4,00 | 8,70 | 10,80 | 9,90 | |
10 | 3,70 | 8,00 | 10,00 | 9,70 | |
25 | 3,00 | 6,40 | 8,00 | 9,50 | |
50 | 2,50 | 5,40 | 6,70 | 9,30 | |
80°C | 1 | 4,00 | 8,60 | 10,40 | 9,50 |
5 | 3,50 | 7,70 | 9,20 | 9,00 | |
10 | 3,00 | 6,50 | 7,80 | 8,90 | |
25 | 2,40 | 5,20 | 6,20 | 8,60 | |
90°C | 1 | 3,30 | 7,20 | 8,70 | 7,80 |
5 | 2,30 | 5,10 | 6,00 | 7,40 | |
10 | 2,00 | 4,30 | 5,10 | 7,30 |
SDR = Standard Dimension Ratio (diameter/wall thickness ratio)
S = Single layer
MF = Multilayer faser
MF RP = Multilayer faser – raised pressure (resistance)
The determination of the allowable pressures resulted from the specific conditions to which pipe system components in the drinking water domestic installation are exposed to.
Limiting factors such as increased flow rates, the use of disinfectants, increased content of oxygen, etc. were considered by the use of the appropriate safety factors.
For fittings of butt-welded pipe segments a reduction factor of 0.75 (reduction of the table values by 25 %) is effective.
Comparision of the water content per meter
SDR = Standard Dimension Ratio (diameter/wall thickness ratio)
S = Single layer
MF = Multilayer faser
MF RP = Multilayer faser – raised pressure (resistance)
The determination of the allowable pressures resulted from the specific conditions to which pipe system components in the drinking water domestic installation are exposed to.
Limiting factors such as increased flow rates, the use of disinfectants, increased content of oxygen, etc. were considered by the use of the appropriate safety factors.
For fittings of butt-welded pipe segments a reduction factor of 0.75 (reduction of the table values by 25 %) is effective.
ø Dimension mm |
aquatherm green pipe SDR 6 S |
aquatherm green pipe SDR 7,4 MF aquatherm blue pipe SDR 7,4 MF SDR 7,4 MF OT |
aquatherm green pipe SDR 9 MF RP |
aquatherm green pipe SDR 11 S aquatherm blue pipe SDR 11 MF SDR 11 MF OT SDR 11 S |
aquatherm blue pipe SDR 17,6 MF |
ø 16 |
0,088 |
0,106 |
– |
– |
– |
ø 20 |
0,137 |
0,163 |
– |
0,206 |
– |
ø 25 |
0,216 |
0,254 |
– |
0,327 |
– |
ø 32 |
0,353 |
0,423 |
0,483 |
0,539 |
– |
ø 40 |
0,555 |
0,660 |
0,754 |
0,834 |
– |
ø 50 |
0,876 |
1,029 |
1,182 |
1,307 |
– |
ø 63 |
1,385 |
1,647 |
1,869 |
2,074 |
– |
ø 75 |
1,963 |
2,323 |
2,659 |
2,959 |
– |
ø 90 |
2,826 |
3,358 |
3,825 |
4,252 |
– |
ø 110 |
4,229 |
4,999 |
5,725 |
6,359 |
– |
ø 125 |
– |
– |
7,386 |
8,199 |
9,637 |
ø 160 |
– |
– |
12,109 |
13,430 |
15,792 |
ø 200 |
– |
– |
18,908 |
21,010 |
24,661 |
ø 250 |
– |
– |
29,605 |
32,861 |
38,568 |
ø 315 |
– |
– |
46,966 |
52,172 |
61,223 |
ø 355 |
– |
– |
59,625 |
66,325 |
77,832 |
ø 400 |
– |
– |
– |
84,290 |
98,756 |
ø 450 |
– |
– |
– |
106,477 |
125,036 |
ø 500 |
– |
– |
– |
– |
154,272 |
ø 560 |
– |
– |
– |
– |
193,688 |
ø 630 |
– |
– |
– |
245,070 |
Fire load
The values required for determining the fire load within a fire section are calculated from the total of all flammable materials located within this area. The calculation for establishing the combustion heat V [kWh / m] for a fire section in the event of an outbreak is dependent on dimensions and materials.
The basis used for the calculation of pipes made of PP-R is the lower calorific value
Hu = 12,2 kWh/kg (as per DIN V 18230 T1) in conjunction with the mass of material mpipe [kg/m].
The integrated layers of faser in aquatherm faser-composite pipes also are considered.
Depending on the calculation procedure, the fire load is worked out with reference to the burn-up factor. This value is designated as mFaktor and is taken as 0.8 for polypropylene.
Dimension
mm |
aquatherm green pipe | aquatherm green pipe SDR 7,4 S |
aquatherm green pipe SDR 6 S |
aquatherm green pipe SDR 9 MF RP |
aquatherm green pipe
SDR 7,4 MF & aquathermblue pipe SDR 7,4 MF | SDR 7,4 MF OT |
aquatherm blue pipe SDR 11 MF SDR 11 MF OT |
aquatherm blue pipe SDR 17,6 MF |
16 | – | 1,17 | 1,5 | – | – | – | – |
20 | 1,32 | 1,82 | 2,12 | – | 1,76 | – | – |
25 | 2,01 | 2,83 | 3,27 | – | 2,74 | – | – |
32 | 3,18 | 4,54 | 5,33 | 3,12 | 4,39 | 3,14 | – |
40 | 5,05 | 7,05 | 8,24 | 5,69 | – | 4,83 | – |
50 | 7,82 | 10,99 | 12,77 | 8,80 | – | 7,48 | – |
63 | 12,35 | 17,28 | 20,26 | 14,03 | – | 11,82 | – |
75 | 17,21 | 24,58 | 28,68 | 19,71 | – | 16,48 | – |
90 | 24,92 | 35,21 | 41,22 | 28,41 | – | 23,86 | – |
110 | 36,89 | 52,68 | 61,45 | 42,17 | – | 35,33 | – |
125 | 47,91 | – | – | 54,38 | – | 45,83 | 32,91 |
160 | 78,28 | – | – | 88,90 | – | 74,88 | 48,53 |
200 | 121,89 | – | – | 139,00 | – | 116,64 | 75,68 |
250 | 189,59 | – | – | 216,18 | – | 181,42 | 117,64 |
315 | 313,54 | – | – | 343,66 | – | 285,82 | 186,32 |
355 | 381,86 | – | – | 436,33 | – | 362,93 | 236,07 |
400 | 505,08 | – | – | – | – | 460,78 | 299,73 |
450 | 639,28 | – | – | – | – | 583,21 | 378,64 |
500 | – | – | – | – | – | – | 468,24 |
560 | – | – | – | – | – | – | 584,88 |
630 | – | – | – | – | – | – | 740,59 |

Contact: aquatherm GmbH | Biggen 5 | 57439 Attendorn Germany | Tel: +49 2722 950 0 | info@aquatherm.de