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Cathodic Installation on Mains
Our client required new tags for Cathodic Protection connections to be welded to live sewer branches. As the client’s usual contractors were not Confined Space qualified gmhs were engaged to complete the required task. The task also involved using Non-Destructive Digging to expose the sides of the concrete pits so that penetrations could be made in order to run conduits from the Cathodic Protection points to hook up points to external points above ground level.
Project Highlights
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Managing a high risk project without incident and able to adapt to changing conditions throughout.
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Installing and positioning the pumps that were larger than the existing pumps in an area that provided minimal room for installation.
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Being able to assess and implement strategies throughout the project as unknown variables were identified.
Services Provided
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Welding new tags for Cathodic Protection connections to existing MSCL mains
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Confined Space works
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Core drilling penetrations into the existing chambers for conduits
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New conduits for cables inside the chambers
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Supply of 16mm 4+E cabling and connecting the cables to new tags welded in position
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Recoat pipe work using High Impact Casting Epoxy
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NDD on outside of chambers for conduits to above ground level
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Backfilling around chambers upon completion
Services Provided
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Assessment of the condition of the deteriorated carpark and surrounding areas.
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Collaboration with our client to develop a Request for Quotation (RFQ) for the rectification works, providing expert advice and recommendations on the best approach to address the issues within budget and time constraints.
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Implementation of safety measures by cordoning off the affected areas to prevent public access during the works.
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Carrying out the necessary resurfacing and repairs to the carpark and other high-traffic areas, ensuring a safe and functional environment for the public until the larger capital project is completed.
Challenges
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Working within Confined Spaces that were congested with pipework made it difficult to access the weld locations.
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The pits were over 4m deep which made it challenging to run the conduits up the side of the chamber and along the top to the wall penetrations.
Outcome
We successfully welded the 4 cathodic protection plates in place within the 2 separate chambers. The cabling was routed around the chamber and out to surface level external of the existing structure ready for splicing. The resulting works enabled the client’s electricians to complete their project and ensure the longevity of the sewer assets through continual monitoring.