Heating element butt welding
Welding parameters polyethylene
Guidance values for the heating element butt welding of PE-pipes and fittings are provided by the pipe manufacturers. They generally apply at an external temperature of about 20 °C (68°F).
Type of material |
Nominal wall thickness [mm] |
Alignment Height of bead at the end of the alignment time (minimal value) [mm] |
Heating-up Heating-up time = 10 x wall thickness [sec] |
Relocating Relocating time (maximum time) [sec] |
Joining | |
---|---|---|---|---|---|---|
Preparation time of jointing pressure [sec] |
Cooling-off time under jointing pressure (minimal value) [min] |
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HD-PE | p = 0.15 N/mm2 | p ≤ 0.02 N/mm2 | p = 0.15 N/mm2 | |||
...4.5 | 0.5 | ...45 | 5 | 5 | 6 | |
4.5...7.0 | 1.0 | 45...70 | 5...6 | 5...6 | 6...10 | |
7.0...12.0 | 1.5 | 70...120 | 6...8 | 6...8 | 10...16 | |
12.0...19.0 | 2.0 | 120...190 | 8...10 | 8...11 | 16...24 | |
19.0...26.0 | 2.5 | 190...260 | 10...12 | 11...14 | 24...32 | |
26.0...37.0 | 3.0 | 260...370 | 12...16 | 14...19 | 32...45 | |
37.0...50.0 | 3.5 | 370...500 | 16...20 | 19...25 | 45...60 | |
50.0...70.0 | 4.0 | 500...700 | 20...25 | 25...35 | 60...80 |