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Multi-phase Delivery District Heating Network

Project Location: 

Cardiff

Client Name:

Hemiko

Valmech, part of OCU Group, supported Hemiko in the delivery of the Cardiff District Heating Network, installing underground district heating pipework across multiple phases of the scheme.

  • Managing excavation and installation in areas with unknown and congested underground services with restricted access across city-centre locations

  • Coordinating multiple work fronts across seven phases with varying constraints and priorities whilst adapting to ongoing design and material changes

  • Maintaining programme momentum while adjusting to evolving site conditions and service conflicts

  • Delivering in live urban environments with high public interface

Challenge

Project Description: 

Valmech, part of OCU Group, supported Hemiko in the delivery of the Cardiff District Heating Network, 

installing underground district heating pipework across multiple phases of the scheme.


The works included jointing, welding, testing and tie-ins within live excavation environments, often influenced by changing ground conditions and the presence of existing services. Delivered across several key city-centre locations, the project required continuous coordination between site teams and the client to adapt to evolving designs, maintain programme momentum, and ensure safe, efficient delivery.

  • Established daily coordination between excavation, welding and installation teams to maintain alignment

  • Reviewed and adjusted installation details to accommodate design updates and minimise delays

  • Applied phased testing and completion strategies to recover programme and maintain progress

  • Maintained strong communication across all stakeholders to ensure efficient and safe delivery

Solution

Key Stats:

  • Installation of multiple UDHN pipe sizes across the network

  • Seven key phases delivered across major Cardiff locations

  • Works completed across city-centre and high-traffic environments

  • Demonstrated flexibility and capability in delivering complex, multi-phase urban energy projects

  • Contributed to the expansion of low-carbon heat infrastructure across Cardiff

  • Maintained delivery momentum despite design changes and underground service constraints

  • Enabled efficient on-site problem solving through close collaboration with our client and other stakeholders

  • Ensured operative and public safety through effective site segregation and procedures throughout the programme

Outcome

12 Months

Duration

Valmech, part of OCU Group, supported Hemiko in the delivery of the Cardiff District Heating Network, installing underground district heating pipework across multiple phases of the scheme.
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