17
Geberit Drainage Systems
Jointing methods
4.1
Butt welding
All diameters from Ø 40 to 315mm can be butt welded.
Connection properties
a
Permanent leak free jointing.
b
Rigid, non-removable.
c
Tension-resistant.
d
A simple reliable connection.
Application
Butt welding is the easiest jointing method, providing
the many advantageous benefits of prefabrication;
Geberit HDPE needs no other component in order to
be butt welded.
It can be used in all circumstances where prefabrication
is used on site or in the workshop.
The essential conditions for a perfect weld are:
• Cleanliness of the welding plate and the parts
that are to be welded.
• A correct welding plate temperature with the green
light showing.
• The correct pressure for jointing the parts.
• The parts to be welded must be cut square <) 90°.
• The pipes are round and ends match. On larger
diameter pipes the use of centering rings may be
required to reform pipes to true circles.
Butt welding takes up little space. The edge of the weld
does not obstruct the pipe, leaving its internal cross-
section virtually unchanged. Even quite complicated
distribution parts can be assembled in a small space,
without wastage of material, because lengths of pipe or
elbow sections can be easily reused through butt welding.
Allowance for butt welds
Butt-weldingcreatesalossinlengthinthemeltingand
joining of the welded ends. This needs to be accounted
for during asse
mb
ly.
Preparation for butt welding
Pipe must be cut square using pipe cutters or a hand
mitre saw as shown in the diagrams below.
Pipe Cutter
The cutting surface must stay clean, therefore do not
touch the cutting surface with your hands.
Depending on the diameter of the pipe, Geberit HDPE
can be butt welded either by hand or machine.
Hand Mitre Saw
PD (mm)
40-75 90 110 125 160 200 250 315
BW (mm)
3 4 5 5 7 7 8 10
PD = Pipe Diameter BW = Butt Welds
Ø 40 – 160mm
Ø 200 – 315mm
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