- Home
- Quality & installation
Clear standards and tests you can check
What Pilsa Therm is made to, who tested it, and how it is welded and tested on site.
Standards applied in production
| DIN 8077 | Pipe design and dimensions |
|---|---|
| DIN 8078 | General quality requirements and testing of PP pipes |
| DIN 16962 | Pipe joints and components for PP pressure pipes |
| DIN 16928 | Pipe connections and component layout |
| DVS 2207 | Welding regulations for plastic pipes |
| E-DIN 1988 | Drinking-water lines in premises |
Properties of PP-R
| Density | 0.9 g/cm³ |
|---|---|
| Melt flow rate MFR (230°C / 2.16 kg) | 0.3 g/10 min |
| Coefficient of linear thermal expansion | 1.5 × 10⁻⁴ 1/K |
| Thermal conductivity | 0.24 W/mK |
| Modulus of elasticity (tension) | 900 MPa |
| Charpy impact, notched at +23°C | 20 kJ/m² |
| Charpy impact, notched at 0°C | 4 kJ/m² |
| Charpy impact, notched at −23°C | 2 kJ/m² |
Independent tests on Pilsa Therm samples
Housing and Building National Research Center
Pipe tests to DIN 8077/8078: dimensions, heat reversion, impact and hydrostatic pressure, plus UV-resistance testing of the black pipes.
Faculty of Engineering, Alexandria University
Hydrostatic pressure testing of pipes and fittings at 150% of working pressure.
National Research Centre
Material tests: tensile, density, melt flow and impact.
Faculty of Engineering, Mansoura University
Pressure testing of pipes with their joints.
Test reports are available to consultants and contractors on request.
Every batch is inspected before storage
- Dimensional control
- Surface finish
- Heat reversion test
- Pressure testing
Heat-fusion welding, step by step
- Cut the pipe with PP-R scissors at an exact 90° angle. An electric saw is not preferred because it generates heat.
- Clean the pipe and fitting surfaces of any dirt or contaminants; they weaken the weld.
- Set the welding machine to 260°C and wait 5 minutes after it reaches temperature. Below 5°C ambient, increase heating time by 50%.
- Clamp the pipe and fitting to prevent relative movement during welding.
- Heat according to the table, then push pipe and fitting together in line and let them cool without twisting.
| Outer diameter (mm) | Welding depth (mm) | Heating time (s) | Welding time (s) | Cooling time (min) |
|---|---|---|---|---|
| 16 | 13 | 5 | 4 | 2 |
| 20 | 14 | 6 | 4 | 2 |
| 25 | 16 | 7 | 4 | 2 |
| 32 | 18 | 8 | 6 | 4 |
| 40 | 20 | 12 | 6 | 4 |
| 50 | 23 | 18 | 6 | 4 |
| 63 | 26 | 24 | 8 | 6 |
| 75 | 28 | 30 | 10 | 8 |
| 90 | 30 | 40 | 11 | 8 |
| 110 | 32 | 50 | 12 | 8 |
Pressure test for the guarantee certificate
- Visual check: all installed pipes and fittings are company products.
- Confirm all fusion welds are correct and properly installed.
- Seal all outlets with end caps and install the test pump.
- Fill the network and make sure water has reached all pipes and fittings.
- Raise the pressure to 10 bar and hold for 10 minutes.
- Raise the pressure to 15 bar and hold for 10 minutes.
- Raise the pressure to 20 bar and hold for 1 minute.
- Drop the pressure to atmospheric.
- Raise the pressure to 10 bar and hold for 10 minutes.
- With no leakage confirmed, the guarantee certificate is issued to the customer.