M Group Services Water Division - Flipbook - Page 16
PI PE JO I NT RE PA I R
SE A LS (A M E X-10)
IMPULSE
CLEANING
AMEX-10 seals are a low-profile mechanical
Impulse cleaning is a technique used to clean
seal for internally repairing leaking joints, radial
the inside surfaces of pipes using computer-
cracks and isolated damages in pipelines.
controlled pulses of medical grade air and small
They provide a new water and airtight seal
volumes of water. Unlike traditional flushing
which spans the leaking joint and surrounding
and air scouring methods, impulse cleaning has
area. The seal works by positioning a rubber
the capability to remove all sediments, biofilms,
seal over the affected joint area and then
manganese, iron oxides and debris such as
placing steel retaining bands into grooves on
aggregates, up to 25mm in size. Comparisons
the surface of the seal. A hydraulic device
have demonstrated better cleaning results than
expands the bands and applies a radial load,
other methods, such as ice pigging, as well as
which pushes the seal firmly against the inside
using 20% less water. Impulse cleaning can also
diameter of the pipe. The seals can handle
be applied and removed very quickly, generally
operating pressure of up to 22.5 bar.
complying with the 3-hour supply interruptions
window.
AMEX-10 seals can be used in pipelines of
any diameter where safe access is achievable,
typically from 600mm to 4000mm in
diameter. The seals are suitable for both
FLUME IN A BOX
pressurised and non-pressurised pipelines
and can be installed in potable and raw water
Morrison Water Services in collaboration with
pipelines, sewerage network infrastructure and
SIRIS provide a quicker solution for installing
chemical pipelines.
flowmeter with minimise disruption to the
environment and surrounding habitats.
AMEX-10 seals are approved by the Water
Regulations Approval Scheme (WRAS), and
Traditional solution would be to excavate and
also benefit from a 50-year life expectancy,
constructe a new concrete flume around an
providing a long-term, no-dig solution to pipe
inlet pipe then cut the inlet pipe to allow flow
repair.
to pass through the new flume. The ‘flume in
a box’ solution avoided the need to construct
a new concrete flume, eliminating the safety
risks associated with deep excavation, shoring,
deliveries and plant usually required. Achieved
by designing and constructing a light weigh
pre-fabicated flume, off site.
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