A frequent problem of
conducting sealing and testing operations within pipelines is the need to cut
throughput for the duration of the work. Further downtime can be caused by the
need to transport and install solid mechanical barriers with bracing to ensure
safety during maintenance.
A solution to these
issues is provided by rapidly deployed Pronal ORJT and ORJ inflatable elastomer
stoppers from Air Springs Supply Pty Ltd, which give pipeline engineering and
maintenance staff an easily transportable and secure way to conduct sealing and
ORJT models feature
bypasses that fulfil two important roles:
and gas contents can continue to flow while maintenance work proceeds, with the
bypasses in each stopper being connected by a conduit feeding through the secure
void created between the two stoppers.
the bypasses can be used to introduce pressurised liquid or gases into the void
created between the stoppers, providing a testing media with which to detect
ORJ models, meanwhile,
are designed for applications that don’t require bypasses but which, like the
ORJT models, can be rapidly deployed, easily transported and widely applied in
remote, temporary and permanent industrial situations. They are suitable for
all types of pipelines including concrete, cast iron, steel, stainless steel
Each size of stopper can
fit several pipe diameters between 45-1200mm.They feature flexible and strong
vulcanised construction that moulds into the inside circumference of pipelines
as the stoppers are pressurised, providing complete tightness and high safety
thanks to large contact areas and circumferential rings.
“They are extremely strong and durable in service, being
hot vulcanised in a mould to give outstanding service life,” says Air Springs
Supply National Marketing Manager Mr James Maslin. “The big advantages of the
technology also include simplicity, portability and re-use.
Maintenance staff don’t need huge amounts of gear on-site
and the stoppers themselves are easy to transport around plants to remote
locations, where they can be used, moved on, and used again and again. They are
an ideal method by which to achieve compliance with statutory requirements in a
cost-effective and efficient manner.”
ORJT and ORJ stoppers are part of a boarder range of Pronal maintenance and
spill prevention stoppers available from Air Springs Supply available in stock
sizes to fit pipelines up to 2115m metres inside diameter, with custom-produced
models over 3000mm.