It is widely known that crosslinked, i.e. unmeltable polyethylene (PE-X), c
an be welded with electrical welding sleeves; it is even possible to butt w
eld PE-X to PE-I-ID or to PE-X. At the IKM in Essen, it has now been system
atically investigated which welding parameters in butt welding lead tu high
weld quality.