has developed great expertise in the supply and installation of Polyethylene
(PE) piping for hydro-electric schemes and other applications.
PE piping offers
several advantages over more traditional steel or GRP pipe. It is
flexible and light, enabling the pipe to follow contours without
the need for creating socket joins. Such joins are expensive to
install and are susceptible to misalignment and 'pop out' from the
hammer effect of major surges in water pressure.
butt-fusion technique developed for connecting PE pipe sections,
creates virtually seamless joins, effectively providing one continuous
length of pipe. The continuous nature of the piping takes the worry
out of whether the pipe will pass mandatory pressure tests. During
the joining process the butt-fusion equipment provides a computerised
read-out of each completed joint to ensure that all parameters have
Marine can supply and install piping up to 1600mm in diameter, but
this will soon be increased to 2000mm.
PE pipe can
withstand pressures up to 16 bar and can often be buried into the
ground without additional concrete support.
In areas where
piping undulates over uneven ground, air valves are a necessity
to relieve pressure from air locks. Normally a T-piece needs to
be inserted, but in PE piping the valve installation is much easier
and less costly.
and durability of large diameter PE pipe is ideal for use in hydro
schemes and other applications such as sewer outfalls. While large
diameter PE can be more expensive to buy than steel or GRP piping,
the time and other costs saved during installation, makes it much