Gas Services

Radius Subterra delivers specialist pipeline engineering services for gas transmission, distribution, and industrial networks.

Our teams provide safe, efficient and compliant solutions for live connections, flowstopping, testing, maintenance, and replacement across the UK and beyond.

Our teams provide safe, efficient and compliant solutions for live connections, flowstopping, testing, maintenance, and replacement across the UK and beyond.

Squeeze-Off Technique Flowstopping Radius Subterra Solution

Flowstopping

Our teams deliver safe, controlled flowstopping on gas mains using bag-off, squeeze-off, and advanced stopple systems, including folding-head and Minimuss line-stop technology. These methods enable live gas network interventions, minimise disruption, and provide secure, temporary containment for repairs, diversions, and asset upgrades.

Encapsulation technique Pipeline Repair & Maintenance Solution Radius Subterra

Pipeline Repair & Maintenance

Radius Subterra offers rapid-response pipeline repair and maintenance services for polyethylene (PE) and metallic gas assets, including leaking fittings, damaged sections, valve installations, and reinforcement works. All repairs follow gas industry specifications, using specialist tooling and controlled procedures to reduce risk, downtime, and excavation requirements. 

Metallic Under Pressure Connections Solution Radius Subterra

Under Pressure Connections 

We deliver safe, fully live under-pressure connections on polyethylene (PE) and metallic gas mains of all materials, diameters, and pressure classes. Our capabilities include standard and bespoke electrofusion branch saddles and purpose-designed metallic under-pressure tees, enabling new feeds, bypasses, and network upgrades without shutdowns or service disruption. 

Butt Fusion technique Pipework Installation & Mainlaying Solution Radius Subterra

Pipework Installation & Mainlaying 

We install new polyethylene (PE) and metallic gas mains for both distribution and industrial networks, covering all pressures from low to intermediate. Our teams deliver open-cut and alternative installation methods, covering jointing, tie-ins, and commissioning. All work follows strict gas-sector standards with full reporting, including weld records, pressure tests, as-built data and asset traceability.

Pneumatic Testing technique Pressure Testing solution Radius Subterra

Pressure Testing

We carry out full pressure testing and commissioning for new and existing gas pipelines, ensuring network integrity, regulatory compliance, and operational readiness. Our technicians deliver controlled, traceable testing with digital reporting, giving stakeholders confidence that pipeline assets are safe, reliable, and ready for connection or return to service. 

Large Diameter PE Cutting technique Pipe Cutting solution Radius Subterra

Pipe Cutting

We provide precision cold-cutting of metallic and polyethylene (PE) gas mains using engineered, spark-free equipment for both longitudinal and circumferential cuts. Our controlled methods protect inserted PE pipelines, reduce operational risk, and support safe replacement and connection. Every operation is planned, monitored, and fully recorded to ensure compliance and safe execution. 

Bespoke PE Fabrications technique Manufacture & Fabrications solutions Radius Subterra

Manufacture & Fabrication 

Our in-house engineering capability produces specialist fittings, fabricated components, and bespoke solutions for gas networks. We manufacture polyethylene (PE) fabrications, metallic under-pressure tees, completion plugs, stopple tees, adapters, and project-specific assemblies to meet complex operational requirements. All items follow controlled welding, machining, and QA processes, ensuring full compliance for live gas operations. 

Engineering & Project Management Radius Subterra

Engineering & Project Management 

We provide end-to-end project engineering support for gas infrastructure works, managing planning, design reviews, technical assurance, and on-site coordination. Our teams oversee risk assessments, construction sequencing, temporary works, and operational delivery to ensure safe, compliant, and efficient execution across all gas sector projects. 

Subline technique Pipe Lining solution Radius Subterra

Pipe Lining

We provide specialist pipe lining services for gas networks, rehabilitating metallic pipelines to restore integrity, seal defects and extend service life. Our close‑fit lining techniques minimise excavation and disruption while maintaining safe, compliant operation across distribution and specialist gas infrastructure.

We deliver pre‑insulated pipework solutions for specialist gas infrastructure where temperature control, protection and mechanical integrity are essential. Our teams manage installation, repair and replacement works on complex assets, ensuring insulated systems perform reliably in energy centres, plant interfaces and controlled environments.

Case Studies

Discover the prowess of Radius Subterra through our latest case studies.

Witness how we excel in tackling intricate pipeline challenges with innovative solutions and state-of-the-art technology. Stay tuned for more videos showcasing our commitment to engineering excellence.

Halzhausen

Faced with severe leaks in a critical 1500mm trunk main, Radius Subterra provided an innovative pipeline rehabilitation solution using their close-fit PE liner system. This approach restored the pipeline’s integrity

369071f5c6f096d955d9ac9560ce3672de6d3fac

Discover how Radius Subterra’s precision engineering revitalises a historic London waterway with cutting-edge pipeline solutions, installing a bespoke branch saddle onto a live water main in Finsbury Park. This job

Anglian Water North Walsham Rolldown pipe lining

Radius Subterra partnered with Anglian Water to solve leak issues in a hard-to-reach 10” water pipeline in East Anglia. Using their innovative Rolldown & Slipline method, Subterra maximised pipe bore

Case Studies

Discover how Radius Subterra delivers safe, innovative and technically assured solutions across the UK’s most challenging pipeline environments. 

Halzhausen

Faced with severe leaks in a critical 1500mm trunk main, Radius Subterra provided an innovative pipeline rehabilitation solution using their close-fit PE liner system. This approach restored the pipeline’s integrity

369071f5c6f096d955d9ac9560ce3672de6d3fac

Discover how Radius Subterra’s precision engineering revitalises a historic London waterway with cutting-edge pipeline solutions, installing a bespoke branch saddle onto a live water main in Finsbury Park. This job

Anglian Water North Walsham Rolldown pipe lining

Radius Subterra partnered with Anglian Water to solve leak issues in a hard-to-reach 10” water pipeline in East Anglia. Using their innovative Rolldown & Slipline method, Subterra maximised pipe bore

What our client’s say about us

Contact us

Ready to progress your next pipeline project? 

Radius Subterra’s specialist engineering teams are here to support you with safe, efficient and technically assured solutions across every stage of the asset lifecycle. 

Get in touch by phone or email to discuss your requirements and speak directly with our experts. 

Alternatively, complete the form below with the relevant information.

Pipeline Challenge Terms & Conditions

  1. The Promoter
    • The promoter is: Radius Subterra Limited, with registration number 01147475 and its registered address at Radius House, Berristow Lane, South Normanton, Alfreton, Derbyshire, DE55 2JJ.
  2. The competition
    • The title of the competition is Pipeline Challenge.
  3. How to enter
    • The competition will run from 09:00 BST on 29 September 2026 (the “Opening Date“) to 17:00 BST on 1 October 2026  (the “Closing Date”) inclusive.
    • All competition entries received after the Closing Date are automatically disqualified.
    • To enter the competition:
      • Entrants must scan the QR code displayed within the Pipeline Engineering Village at No-Dig Live 2026 at stand G56 and complete the online entry form.
      • Entries must include:
        • description of an industry challenge, operational issue or engineering idea;
        • relevant sector;
        • supporting background information;
        • entrant’s full name (first name and surname);
        • company name; and
        • email address.
      • No purchase is necessary and no payment is required to enter.
      • The Promoter will not accept:
        • responsibility for competition entries that are corrupted, not successfully completed or transmitted, lost, mislaid, damaged or delayed in transit, regardless of cause, including, for example, as a result of any postal failure, equipment failure, technical malfunction, systems, satellite, network, server, website, computer hardware or software failure of any kind; or
        • proof of posting or transmission as proof of receipt of entry to the competition.
      • By submitting a competition entry, you are agreeing to be bound by these terms and conditions.
      • Entries will be reviewed after the event by a judging panel comprising representatives of the Promoter and Flowstop Services Limited (“Judging Panel”). One winner will be selected. Entries will be assessed against the following criteria:
        • relevance to the pipeline and utility sectors;
        • potential industry impact;
        • originality; and
        • potential for development into a practical engineering solution.

The Promoter will take reasonable steps to ensure judges are independent of the entrants and that any conflicts of interest are declared and managed.

  1. Eligibility
    • Entries are limited to attendees aged 18 years or over of No‑Dig Live 2026 scanning the QR code at the event. The Promoter reserves the right to verify attendance.
    • The following cannot enter:
      • employees of the Promoter or its holding or subsidiary companies;
      • employees of agents or suppliers of the Promoter or its holding or subsidiary companies, who are professionally connected with the competition or its administration; or
      • members of the immediate families or households of (a) and (b) above.
    • In entering the competition, you confirm that you are eligible to do so and eligible to claim the prize. The Promoter may require you to provide proof that you are eligible to enter the competition.
    • Entries must primarily reflect the entrant’s own original analysis, reasoning and creative input. The Promoter may disqualify entries where it reasonably believes the submission has been substantially generated by artificial intelligence (including but not limited to chatbots such as ChatGPT or similar software applications).
    • There is a limit of one entry per person. Entries on behalf of another person will not be accepted and joint submissions are not allowed.
    • The Promoter reserves all rights to disqualify you if your conduct is contrary to the spirit or intention of the prize competition.
    • Competition entries cannot be returned.
    • By entering, you confirm that your entry is your own original work, does not infringe the rights (including intellectual property and confidentiality rights) of any third party, and that you have obtained any necessary permissions from your employer or any third party to submit the entry and to grant the rights described in clause 9.
    • Do not include confidential or commercially sensitive information in your entry.
  2. The prize
    • The prize is £200 worth of vouchers, redeemable at Amazon, subject to the issuer’s terms including any expiry date.
    • The prize is subject to availability. There is no cash alternative. The Promoter reserves the right to substitute the prize with a prize of equal or greater value.
    • The prize is not negotiable or transferable.
  3. Winners
    • The decision of the Judging Panel is final and no correspondence or discussion will be entered into.
    • The Promoter will contact the winner by email within 14 days after the Closing Date using the email address provided in the entry.
    • The Promoter will publish the winner’s name and company on LinkedIn within 21 days after the Closing Date (the “Announcement Date”)
    • If you object to any or all of your name and winning entry being published or made available, please contact the Promoter at Radius Subterra Limited, Radius House, Berristow Lane, South Normanton, Alfreton, Derbyshire, DE55 2JJ or email Radius.subterra@radiussubterra.com. In such circumstances, the Promoter must still provide the information and winning entry to the Advertising Standards Authority on request.
  4. Claiming the prize
    • Please allow 14 days for delivery of the prize by e-mail.
    • If the winner cannot be contacted, is not available, or has not claimed the prize within 14 days of the Announcement Date, the Promoter reserves the right to offer the prize to the next highest‑ranked eligible entry as determined by the Judging Panel from the entries received before the Closing Date.
  5. Limitation of liability

Insofar as is permitted by law, the Promoter, its agents or distributors will not in any circumstances be responsible or liable to compensate the winner or accept any liability for any loss, damage, personal injury or death occurring as a result of taking up the prize except where it is caused by the negligence of the Promoter, its agents or distributors or that of their employees. Your statutory rights are not affected.

  1. Ownership of competition entries and intellectual property rights
    • Entries will not be returned. Do not include confidential or commercially sensitive information in your entry.
    • For all entries, you grant the Promoter a worldwide, non‑exclusive, royalty‑free licence to use, review and evaluate your entry for the purposes of administering and judging the competition.
    • If you are selected as the winner, as a condition of receiving the prize you agree to assign to the Promoter, with full title guarantee, all intellectual property rights in your winning entry and to waive your moral rights in the winning entry. You agree to execute any documents reasonably required to perfect such assignment.
    • You warrant that your entry is your own original work, does not infringe any third‑party rights, and that you have all necessary rights and permissions to submit the entry and grant the rights set out in these terms.
  2. Data protection and publicity
    • The Promoter will process your personal data as controller for the purposes of administering the competition (including judging, winner notification and publication). Further details, including lawful bases, recipients, retention periods, your rights, and how to exercise them, are set out in our Privacy Policy available at Privacy Policy. See also condition 3 and condition 6.4, with regard to the announcement of winners.
  3. General
    • If there is any reason to believe that there has been a breach of these terms and conditions, the Promoter may, at its sole discretion, reserve the right to exclude you from participating in the competition.
    • The Promoter may void, suspend, cancel, or amend the competition where necessary due to events outside its reasonable control and will do so acting reasonably.
    • These terms and conditions are governed by English law. If any entrants to this promotion wish to take court proceedings, then they must do this within the courts in the United Kingdom.