Before installation, the internal
surface of pipes and fittings
(especially the circular slot inside
the socket where the rubber
gasket is to be inserted) and the
external surface of a spigot shall
be carefully cleaned from any dirt
and any alien materials or objects
before moving the pipes into the
trench.
When being carried into the
trench, pipes and fittings shall be
clamped with special protective
devices in order to prevent
damages and scratches from
gripping and prevent the items
from bumping each other or
chocks with other objects.
The pipe and fitting connection
is made with the push-on joint
system by radial compression of
the rubber gasket (see Figures) in
the socket circular slot.
The assembling of the pipe and
the fitting shall be carried out in
the following order:
A special mark is applied on
pipes with “TYTON” joint for
showing the limit of a pipe spigot
insertion into the socket.
The rubber gasket is inserted
in the socket circular slot which
must be clean.
Lubricant must be applied on
the external surface of the barrel
spigot (especially on the chamfer)
and on the internal surface of
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the rubber gasket. Lubricant
average use rate is 200gr for
1m2 of operating surface. The
lubricant shall not be applied
to the external gasket surface.
For mounting, fittings shall
be centered in front of the
laid pipe gasket and inserted
into the socket by pushing
with a crowbar or with a wire
rope or chain puller (for small diameters).
Installation tools for pipe
mounting are shown on Figure.
In case some pipes shall be
cut at site it is necessary to
round up the spigot or make a
5 x 30° chamfer.
Ductile iron pipes shall be
mounted using the stovepipe
method directly in the pipeline
design position. Rubber gaskets
render the stray-current
protection unnecessary.
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