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Products - PP-R PIPES & FITTINGS



Concealed Installation

In concealed installation, for both cold and hot water pipe lines, it is not necessary to take into account linear expansion. Pipes can be encased or embedded in walls, concrete and plaster as with other metal pipes

The expansion of pipe due to temperature will not damage the wall plastering as the linear expansion is prevented by the compressive strain and tensile stress of concrete and plaster, it will be absorbed through the material itself.

Insulation
Hot Water System

Normally for hot water systems, it may not be necessary to insulate Vesbo pipes in tropical countries for interior or concealed installation. This is due to the low thermal conductivity property of Vesbo (0.24 W/mK) Heat loss will be minimum. However, for application where central boiler is used for distribution of hot water and the circulation of hot water being continuous, it is necessary to insulate distribution lines to prevent excessive loss heat and energy wastage. Because of the low thermal conductivity of Vesbo Pipes, insulation thickness is greatly reduced. Following is the recommended insulation thickness.

Insulation Thickness for Exposed Hot Water Pipes.

THERMAL CONDUCTIVITY
(W/mk)of INSULATIAN MATERIAL
0.030 0.035
DIMENSION (mm) Recommended Minimum
Insulation Thickness
20 6 mm or 1/4" 10 mm or 3/8"
25 6 mm or 1/4" 10 mm or 3/8"
32 10 mm or 3/8" 13 mm or 1/2"
40 10 mm or 3/8" 13 mm or 1/2"
50 10 mm or 3/8" 13 mm or 1/2"
63 13 mm or 1/2" 20 mm or 1/2"
75 20 mm or 1/2" 20 mm or 1/2"
90 20 mm or 1/2" 20 mm or 1/2"
110 25 mm or 3/4" 32 mm or 1"

Chilled Water System

For chilled water of temperature less than 10 °C , due to condensation that may take place, insulation is necessary but reduced considerably in thickness as compared to metal pipes. Heat loss for hot water pipe is reduced to a minimum.

Table shows the insulation thickness for Vesbo pipes in cold countries and chilled water systems so as prevent condensation.

S=Insulation Thickness, mm (0,038 W/mK Conductivity)

Te=Outside surrounding temperature, °C

Ti=Internal water temperature °C


PIPE Æ20x3.4
TE 26 27 28 29 30 31 32 33 34 humidity %
5 3.7 3.9 4.1 4.3 4.6 4.0 5.0 5.3 5.5  
7 3.0 3.3 3.5 3.8 4.0 4.2 4.5 4.7 5.0 60
9 2.4 2.7 2.9 3.2 3.4 3.7 3.9 4.2 4.4  
5 10.5 10.9 11.3 11.7 12.1 12.4 12.8 13.2 13.6  
7 9.5 9.9 10.3 10.7 11.1 11.5 11.9 12.3 12.7 80
9 8.4 8.8 9.2 9.6 10.0 10.5 10.9 11.3 11.7  


PIPE Æ25x4.2
TE 26 27 28 29 30 31 32 33 34 humidity %
5 3.6 3.8 4.1 4.3 4.6 4.8 5.1 5.3 5.6  
7 3.0 3.2 3.5 3.7 4.0 4.2 4.5 4.8 5.0 60
9 2.3 2.6 2.9 3.1 3.4 3.7 3.9 4.2 4.4  
5 10.9 11.3 11.7 12.1 12.5 12.9 13.3 13.7 14.1  
7 9.7 10.2 10.6 11.0 11.4 11.9 12.3 12.7 13.1 80
9 8.6 9.0 9.5 9.9 10.3 10.8 11.2 11.7 12.1  


PIPE Æ32x5.4
TE 26 27 28 29 30 31 32 33 34 humidity %
5 3.5 3.8 4.0 4.3 4.5 4.8 5.0 5.3 5.5  
7 2.9 3.1 3.4 3.6 3.9 4.2 4.4 4.7 5.0 60
9 2.2 2.5 2.7 3.0 3.3 3.6 3.8 4.1 4.4  
5 11.1 11.6 12.0 12.4 12.9 13.3 13.7 14.1 14.6  
7 10.0 10.4 10.9 11.3 11.8 12.8 12.7 13.1 13.5 80
9 8.7 9.2 9.7 10.1 10.6 11.1 11.6 12.0 12.5  


PIPE Æ40x6.7
TE 26 27 28 29 30 31 32 33 34 humidity %
5 3.4 3.6 3.9 4.2 4.4 4.7 4.9 5.2 5.5  
7 2.7 3.0 3.2 3.5 3.8 4.1 4.3 4.6 4.9 60
9 2.0 2.3 2.6 2.8 3.1 3.4 3.7 4.0 4.3  
5 11.3 11.8 12.3 12.8 13.2 13.6 14.4 14.5 15.0  
7 10.1 10.6 11.0 11.5 12.0 12.5 12.9 13.4 13.9 80
9 8.8 9.3 9.8 10.3 10.8 11.3 11.8 12.3 12.8  


PIPE Æ50x8.3
TE 26 27 28 29 30 31 32 33 34 humidity %
5 3.1 3.4 3.7 4.0 4.2 4.5 4.8 5.0 5.3  
7 2.4 2.7 3.0 3.3 3.6 3.8 4.1 4.4 4.7 60
9 1.7 2.0 2.3 2.6 2.9 3.2 3.5 3.8 4.1  
5 11.5 11.9 12.4 12.9 13.4 13.8 14.3 14.8 15.3  
7 10.1 10.6 11.1 11.6 12.1 12.6 13.1 13.6 14.1 80
9 8.8 9.3 9.8 10.4 10.9 11.4 11.9 12.4 13.0  


PIPE Æ63x10.5
TE 26 27 28 29 30 31 32 33 34 humidity %
5 2.8 3.1 3.4 3.7 4.0 4.2 4.5 4.8 5.1  
7 2.1 2.4 2.7 3.0 3.3 3.6 3.8 4.1 4.4 60
9 1.4 1.7 2.0 2.3 2.6 2.9 3.2 3.5 3.8  
5 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5  
7 10.1 10.6 11.2 11.7 12.2 12.7 13.2 13.8 14.3 80
9 8.7 9.2 9.8 10.3 10.9 11.4 12.0 12.5 13.1  


PIPE Æ75x12.5
TE 26 27 28 29 30 31 32 33 34 humidity %
5 2.5 2.8 3.1 3.4 3.7 3.9 4.2 4.5 4.8  
7 1.8 2.1 2.4 2.7 3.0 3.3 3.5 3.8 4.1 60
9 1.0 1.3 1.6 1.9 2.2 2.6 2.9 3.2 3.5  
5 11.4 11.9 12.4 13.0 13.5 14.0 14.5 15.0 15.6  
7 10.0 10.5 11.1 11.6 12.1 12.7 13.2 13.8 14.3 80
9 8.5 9.1 9.7 10.2 10.8 11.3 11.9 12.5 13.0  


PIPE Æ90x15.0
TE 26 27 28 29 30 31 32 33 34 humidity %
5 2.63 2.93 3.22 3.51 3.81 4.10 4.39 4.69 4.98  
7 1.89 2.19 2.49 2.79 3.09 3.40 3.70 4.00 4.30 60
9 1.13 1.44 1.75 2.06 2.37 2.68 2.99 3.30 3.62  
5 11.78 12.32 12.86 13.40 13.93 14.47 15.01 15.55 16.09  
7 10.31 10.87 11.43 11.99 12.55 13.11 13.67 14.23 14.79 80
9 8.81 9.39 9.8 10.56 11.14 11.73 12.31 12.89 13.48