BE-15 Pipes and Materials: Welding of Plastic Pipes

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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).

Table:

Guidance values for the heating element butt welding of pipes, pipelines and sheets made of HD-PE at an external temperature of about 20°C and moderate air flow (interim values have to be interpolated) according to [DVSR2207-1]

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
Type of material	Nominal wall thickness [mm]		Heating-up Heating-up time = 10 x wall thickness [sec]	Relocating Relocating time (maximum time) [sec]	Preparation time of jointing pressure [sec]	Cooling-off time under jointing pressure (minimal value) [min]
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

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