Pipe Outer Diameter

Insulation Thickness in Pipes




20x3.4mm 16.5mm 21.0mm
25x4.2mm 16.8mm 20.2mm
32x5.4mm 16.9mm 32.2mm
40x6.7mm 24.5mm 31.0mm
50x8.3mm 25.0mm 30.2mm
63x10.5mm 35.0mm 42.0mm
75x12.5mm 41.0mm 51.0mm
90x15.0mm 48.5mm 60.5mm
110x18.3mm 60.0mm 74.2mm

Assembly Principles

Radial and axal expansion of the pipe assembled outdoors should not be prevented. To obtain good results fixed supports should be chosen in such way that they do not damage the outer surface of the pipe.

Fixed Support

Fixed supports are used to fix the pipe at a certain points against undesired pipe movements. Fixed supports should be stronger compored to the sliding supports. Fittings are used to construct fixed supports. At the points where direction changes fixed supports should not be used. The distance between the fixed supports should be chosen in such a way that pipe thermal expansion is not affected.

For instulated pp-r installed outdoor, thermal expansion should be calculated within the planperiod.

Welding principles of pp-r pipes and fittings

Preparation of the welding machine

1-Welding machine is heated up to 260°C. When the control light goes off at 260°C welding process can be started.  Pipe should be cut to the appropriated length perpendicular to the pipe axis. Welding distance should be marked  from the pipe.

2-Welding surfaces of pipes and fittings ahould be clean. If necassery welding surfaces should be cleaned with alcohol and dired with a dry cloth. During welding neither the pipe nor the fittings should be moved.


3- Pipes and fittings should be heated. When the heating process ends they should be taken ouit quickly and joined by pressing one to another axially without twisting. Welding machine should be cleaned after every operation for the next use.