--- title: "Mobile Transformer Oil Processing Vehicles (Trailer Mounted) - Design, Manufacture, Supply, Commissioning and Support" ocid: "ocds-h6vhtk-07751e" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-07751e" markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-07751e.md" json_url: "https://d3tenders.com/contract/ocds-h6vhtk-07751e.json" source: "Find A Tender Service" current_stage: "Planning" buyer: "NATIONAL GRID ELECTRICITY TRANSMISSION PLC" published: "2026-09-18" --- # Mobile Transformer Oil Processing Vehicles (Trailer Mounted) - Design, Manufacture, Supply, Commissioning and Support Buyer: NATIONAL GRID ELECTRICITY TRANSMISSION PLC Current stage: Planning OCID: ocds-h6vhtk-07751e [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-07751e) [Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-07751e.json) ## Summary National Grid Electricity Transmission plc intends to procure two fully integrated, road-legal, trailer-mounted mobile transformer oil processing vehicles for use at operational substations and construction sites across the United Kingdom. The goods will include transformer oil treatment plant for filtration, drying, degassing and vacuum processing, with a minimum processing capability of 7,500 litres per hour at 50°C. Each vehicle must integrate vacuum systems, onboard power generation, fuel storage, controls and automation with PLC/SCADA, monitoring, alarms, data recording and remote access. The scope also covers welfare and operational facilities, safety and environmental protection, testing, commissioning, technical documentation, training, warranty, maintenance and lifecycle support. Relevant classifications include special-purpose vehicles, trailers, oil filters and control equipment. This procurement is at the planning stage: National Grid has announced its intention to procure but has not yet invited tenders. It expects to use a selective competitive flexible procedure under the utilities regime for an above-threshold goods contract. Suppliers are expected to submit an expression of interest by 7 December 2026; the planned tender notice date is 30 November 2026, and the expected award decision date is 1 September 2027. The planned contract period is 1 October 2027 to 29 September 2031, with possible extension by mutual agreement to 29 September 2033. There is one planned lot. National Grid may purchase up to two additional equivalent vehicles, subject to business requirements, funding approval and satisfactory initial performance. Expressions of interest and tender submissions are to be in English. The requirement will suit manufacturers and specialist engineering suppliers able to design and build bespoke mobile transformer oil treatment and vacuum-processing equipment, or lead an integrated delivery team covering trailers, vehicles, process plant, power generation, instrumentation and control systems. Suppliers should be prepared to demonstrate the capacity to deliver two complete field-deployable assets and support their operation across a national electricity transmission network. Relevant capability includes transformer oil filtration, drying and degassing; vacuum treatment; PLC/SCADA integration; road-legal trailer manufacture; factory and site acceptance testing; commissioning; operator and maintainer training; technical documentation; spares; warranty and after-sales support. The specification also calls for compliance with applicable UK legislation and industry standards, including safety, fire protection and environmental controls. ## Notice National Grid Electricity Transmission (NGET) is seeking a supplier to design, manufacture, supply, commission and support two (2) fully integrated, trailer-mounted mobile transformer oil processing vehicles, with an option, at NGET's sole discretion, to purchase up to two (2) additional equivalent units under the resulting contract. Any additional purchases will be subject to business requirements, funding approval and satisfactory performance of the initial units. The solutions shall be road-legal, self-contained and suitable for deployment at operational substations and construction sites throughout UK. The scope includes: * Design, manufacture, testing, supply and delivery of two (2) mobile transformer oil processing trailers, with an option for NGET to purchase up to two (2) additional equivalent units under the resulting contract. * Provision of transformer oil treatment plant capable of oil filtration, drying, degassing and vacuum processing operations, including a minimum oil processing capability of 7,500 litres/hour at 50degC. * Integrated vacuum systems capable of transformer and chamber vacuum treatment, both independently and simultaneously. * Supply of an onboard power generation system including generator, fuel storage, distribution equipment and changeover facilities for external power sources. * Installation of monitoring, control and automation systems, including PLC/SCADA functionality, process alarms, operational data recording and remote-access capabilities. * Provision of welfare facilities, environmental controls, storage arrangements and operational workspaces suitable for field personnel. * Incorporation of all required safety, fire protection, emergency lighting, access and environmental protection systems in accordance with applicable UK legislation and industry standards. * Factory Acceptance Testing (FAT), Site Acceptance Testing (SAT), commissioning and demonstration of operational performance. * Delivery of complete technical documentation, operating manuals, maintenance schedules, drawings, software licences and spare parts recommendations. * Provision of operator and maintainer training, warranty support, technical assistance and after-sales service arrangements for the lifecycle of the asset. Expected Outcome: Two (2) fully operational mobile transformer oil treatment and vacuum processing vehicles that enable safe, reliable and efficient transformer oil conditioning, moisture removal, degassing and associated maintenance activities across the NGET transmission network, while maximising operational availability and long-term asset value. The resulting contract will also provide NGET with the option to procure up to two (2) additional equivalent units, subject to business requirements, funding approval and satisfactory performance of the initial units. ### Lot Information Lot 1 Options: Final Outcome: Two (2) fully operational mobile transformer oil treatment and vacuum processing vehicles that enable safe, reliable and efficient transformer oil conditioning, moisture removal, degassing and associated maintenance activities across the NGET transmission network, while maximising operational availability and long-term asset value. The resulting contract will also provide NGET with the option to procure up to two (2) additional equivalent units, subject to business requirements, funding approval and satisfactory performance of the initial units. Renewal: By Mutual Agreement ## Key Details | Field | Value | | --- | --- | | Publication source | Find A Tender Service | | Latest notice | https://www.find-tender.service.gov.uk/Notice/088533-2026 | | Notice type | UK3 - Planned Procurement Notice | | Procurement type | Standard | | Procurement category | Goods | | Procurement method | Selective | | Procurement method details | Competitive flexible procedure | | Tender suitability | Not specified | | Awardee scale | Not specified | | All stages | Planning | ## Dates | Field | Value | | --- | --- | | Publication date | 18 Sep 2026 | | Submission deadline | Not specified | | Future notice date | 30 Nov 2026 | | Award date | Not specified | | Contract period | 1 Oct 2027 - 29 Sep 2031 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | Not specified | | Lots value | Not specified | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Planned | | Lots status | Planned | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | NATIONAL GRID ELECTRICITY TRANSMISSION PLC | | Locality | LONDON | | Postcode area | Central London | | Postcode | WC2N 5EH | | Country | England | | ITL 1 | TLI London | | ITL 2 | TLI3 Inner London - West | | ITL 3 | TLI35 Westminster and City of London | | Local authority | Westminster | | Electoral ward | St James's | | Westminster constituency | Cities of London and Westminster | | Delivery location | Not specified | ## CPV Codes ### Divisions - 09 - Petroleum products, fuel, electricity and other sources of energy - 31 - Electrical machinery, apparatus, equipment and consumables; lighting - 34 - Transport equipment and auxiliary products to transportation - 42 - Industrial machinery ### Codes - 09211640 - Electrical insulating oils - 31682210 - Instrumentation and control equipment - 34144000 - Special-purpose motor vehicles - 34210000 - Vehicle bodies - 34223300 - Trailers - 34223330 - Mobile units on trailers - 42913300 - Oil filters - 42990000 - Miscellaneous special-purpose machinery ## Release History - 18 Sep 2026 at 10:41 - Planning - UK3 - Planned Procurement Notice - https://www.find-tender.service.gov.uk/Notice/088533-2026 ## Documents - https://www.find-tender.service.gov.uk/Notice/088533-2026 18th September 2026 - Planned procurement notice on Find a Tender - https://www.find-tender.service.gov.uk/Notice/Attachment/A-22236 Expression of Interest response form ## Notice URLs - https://www.legislation.gov.uk/ukpga/2023/54/contents ## Provenance This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-07751e. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-07751e.json.