Why is Polyfusion Welding So Important?
When the correct polyfusion technique is applied, the joint of PPRC pipes becomes as strong as the pipe itself. Incorrect temperature or timing leads to both weak joints and pipe deformation.
Temperature: 260°C ± 10°C
Welding must not be performed until the polyfusion machine reaches 260°C. Pre-heating is recommended in cold weather.
Welding and Cooling Times by Diameter
- 20 mm: Heating 5 sec · Joining 4 sec · Cooling 2 min
- 25 mm: Heating 7 sec · Joining 4 sec · Cooling 2 min
- 32 mm: Heating 8 sec · Joining 6 sec · Cooling 4 min
- 40 mm: Heating 12 sec · Joining 6 sec · Cooling 4 min
- 50 mm: Heating 18 sec · Joining 6 sec · Cooling 4 min
- 63 mm: Heating 24 sec · Joining 8 sec · Cooling 6 min
Common Mistakes to Avoid
- Welding in cold conditions (increase cooling times)
- Welding without cleaning the pipe surface
- Forced cooling after welding (with water)