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included the drill locations, proximity hole reading results can be viewed in
of the drilling to the gasket, as well the graph.
as the volume and speed of sealant
injection. The effectiveness of The results of the mechanical joint
different sealants was assessed at sealing project included:
various pressure ranges to allow ULC The remediation of a 244m section of
to develop, refine and train CISBOT pipeline, with 43 joints remediated
operatives on the new remediation within two weeks. This proactively FIELD SAMPLE OF 24IN MECHANICAL JOINT MAIN FOR TESTING
process before taking the technology remediated the main at the time
into the field. of the project to prevent future
To seal mechanical joints, the disruption to customers.
systems required minor design All the identified leaks on the gas
modifications including a different main were eliminated - 0 per cent
drill specification, new laser alignment GIA readings were taken after ULC
configurations and a modified sealant deployed CISBOT to seal the joints.
delivery system to support a higher
viscosity sealant than what is currently
used for lead yarn joints. The proven Case Study 2
launch, navigation inside the pipe and Remediating SGN’s Network
retrieval of CISBOT remain the same. Taking the ECO-CABIN CONTROL UNIT TO MINIMISE ENVIRONMENTAL IMPACT
technology into the
LIVE FIELD TRIAL TESTING & RESULTS field for a live trial operation which was prevented by
After successful in-house developments on SGN’s network, using CISBOT to upgrade the gas
and testing, Cadent and SGN identified a critical 30in medium pressure main main.
sections of their networks that could was identified in London. The location Using CISBOT reduced the CO₂
be used to perform live environment was chosen to minimise customer emissions generated on-site as the
remediation and upgrade testing of disruption as the gas main ran into a number of excavations were reduced,
the new mechanical joint sealing critical feeder, as well as running near a which resulted in minimal excess
developments. DNV monitored the primary school. Throughout the project, material being sent to landfill.
process throughout the projects, ULC hosted SGN’s senior leadership
carrying out daily leakage monitoring team on-site to explain the new CONTINUOUS IMPROVEMENT
during the trials and weekly monitoring developments and modifications made At ULC Technologies, we are
after the projects were concluded. to the sealing process. SGN and ULC continually investing in the
closely monitored the sealing to ensure development and deployment of
the successful remediation of the asset. revolutionary innovations to meet
Case Study 1 the needs of the industry. To date,
Remediating Cadent’s Network The project resulted in: ULC has successfully sealed over
Cadent identified One excavation to remediate 30 1km of mechanical joints in the UK
a challenging 18in mechanical joints, significantly since the introduction of CISBOT’s
cast iron medium extending the life of the asset. extended capabilities, helping improve
pressure gas main Replacing the gas main would have operational safety and minimise
in Northampton that would be an ideal been a costly and time-consuming customer disruption.
location for CISBOT mechanical joint 60
sealing. This gas main had problematic
leaks, which posed significant 50
challenges to repair conventionally
due to access constraints for the
operatives and the requirement for a 40
3m-deep excavation. In addition, there
were watercourses from the river that 30
would have made the traditional repair Bar Hole Reading in % Gas
process complex, costly, and high risk. 20
Cadent and ULC identified and mapped
out leaking mechanical joints on the 10
main before joint sealing commenced,
taking gas in the air (GIA) readings.
Throughout the two-week sealing Bar Hole # 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
project, the new CISBOT process was Initial Reading 0 0 0 0 0.6 1.5 1 43 0.6 5 0.5 12 0.3 0.5 15 0.2 28 0.3 0
monitored and further readings were Post CISBOT Reading 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
taken during and after sealing. The bar
TOWCESTER ROAD, NORTHAMPTON – BAR HOLE READING EAST DIRECTION
FOR MORE INFORMATION, PLEASE VISIT WWW.ULCTECHNOLOGIES.COM
OR CONTACT OUR UK TEAM AT +44 (0)20 3617 4586

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