---
title: "PQQ for Air Reservoir overhaul"
ocid: "ocds-r6ebe6-0000835148"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-r6ebe6-0000835148"
markdown_url: "https://d3tenders.com/contract/ocds-r6ebe6-0000835148.md"
json_url: "https://d3tenders.com/contract/ocds-r6ebe6-0000835148.json"
source: "Public Contracts Scotland"
current_stage: "Tender"
buyer: "SCOTRAIL TRAINS LIMITED"
published: "2026-06-23"
---

# PQQ for Air Reservoir overhaul

Buyer: SCOTRAIL TRAINS LIMITED  
Current stage: Tender  
OCID: ocds-r6ebe6-0000835148

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## Summary

ScotRail Trains Limited, headquartered in Glasgow, is currently in the tender stage for the overhaul of air reservoirs, an essential component in railway safety systems. This procurement is structured into two Lots: Lot 1 includes services for Class 153, 156, and 158 trains, while Lot 2 covers HST Class 43 Power Car and Mark III Coach. The contract follows a negotiated procedure with prior call for competition and concludes on 24th July 2026, with a maximum of two Lots per supplier. The procurement process demands adherence to strict rail safety standards and includes an option to extend the contract by an additional 12 months. Interested suppliers should submit their applications electronically via ScotRail's e-sourcing platform, with a critical deadline for submissions set for 12:00 PM on the mentioned date.

This tender offers significant opportunities for businesses involved in railway maintenance and engineering services, especially those experienced in compliance with safety-critical standards. Companies capable of providing a robust identification and labelling system for asset management will have a competitive edge. Given the high technical nature of the work and the planned extension options, firms with a strong track record in operational delivery within tightly regulated rail service frameworks will find this an excellent opportunity to deepen their engagement in the railway industry and potentially secure long-term contracts.

## Notice

ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy and the tender will now be separated into Lots to account for the differing contract end date required for the HSTs. - Lot 1 - for Class 153, 156 & 158 trains; and - Lot 2 - for HST Class 43 Power Car & Mark III Coach As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires.

### Lot Information

Air Reservoir overhaul for Class 153, 156 & 158 trains

ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy. The tender will now be separated into Lots to account for the differing contract end date required for the HSTs. Lot 1 - for Class 153, 156 & 158 trains; and As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires. The services must be in accordance with WOSS 310/8 Version 4: Repair Procedure - Dismantling, Cleaning, Examination and Repair, Reassembly and Pain ting, and Test Specification for train classes 153, 156, 158, & HSTs. As part of this service, SRTL requires the supplier to deliver a robust identification labelling system to asset manage each tank to identify the kit and record the overhaul completion date and associated data.. This is a pre-qualification activity in advance of a formal tender process. To participate, suppliers should access and complete the the pre Qualification Questionnaire published on our e-sourcing portal (wax Digital) at https://scotrail.wax-live.com/S2C/DisplayModules/TradeModules/Negotiations/Opportunities/ListEvents.aspxh

Renewal: Option to extend for a further 12 months

Air Reservoir overhaul for HST Class 43 Power Car & Mark III Coach

ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy. The tender will now be separated into Lots to account for the differing contract end date required for the HSTs. Lot 2 - for HST Class 43 Power Car & Mark III Coach As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires. As part of this service, SRTL requires the supplier to deliver a robust identification labelling system to asset manage each tank to identify the kit and record the overhaul completion date and associated data.. This is a pre-qualification activity in advance of a formal tender process. To participate, suppliers should access and complete the the pre Qualification Questionnaire published on our e-sourcing portal (wax Digital) at https://scotrail.wax-live.com/S2C/DisplayModules/TradeModules/Negotiations/Opportunities/ListEvents.aspxh

Renewal: Possible extension of up to 12 months

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Public Contracts Scotland |
| Latest notice | https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUN558524 |
| Notice type | OJEU - F5 - Contract Notice (Utilities) |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Selective |
| Procurement method details | Negotiated procedure with prior call for competition |
| Tender suitability | Not specified |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 23 Jun 2026 |
| Submission deadline | 24 Jul 2026 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | Not specified |
| 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 | Active |
| Lots status | Active |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SCOTRAIL TRAINS LIMITED |
| Locality | GLASGOW |
| Post town | Glasgow |
| Postcode | G2 6HQ |
| Country | Scotland |
| ITL 1 | TLM Scotland |
| ITL 2 | TLM3 West Central Scotland |
| ITL 3 | TLM32 Glasgow City |
| Local authority | Glasgow City |
| Electoral ward | Anderston/City/Yorkhill |
| Westminster constituency | Glasgow North |
| Delivery location | TLM Scotland |

## CPV Codes

### Divisions

- 50 - Repair and maintenance services
- 71 - Architectural, construction, engineering and inspection services

### Codes

- 50220000 - Repair, maintenance and associated services related to railways and other equipment
- 50530000 - Repair and maintenance services of machinery
- 71630000 - Technical inspection and testing services

## Release History

- 23 Jun 2026 at 00:00 - Tender - OJEU - F5 - Contract Notice (Utilities) - https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUN558524

## Documents

- https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=JUN558524
  PQQ for Air Reservoir overhaul - ScotRail Trains Limited (hereinafter referenced as ScotRail) are looking to tender for the provision of an Air Reservoir (various) overhaul service in accordance with rail safety critical and rail standards, and using Scotrail-provided materials. Noting the Out of Service (OSD) for HSTs, the business has revised the procurement strategy and the tender will now be separated into Lots to account for the differing contract end date required for the HSTs. - Lot 1 - for Class 153, 156 & 158 trains; and - Lot 2 - for HST Class 43 Power Car & Mark III Coach As part of the ITN process Suppliers will be able to bid for one or more Lots. An air reservoir is defined as a vessel (other than a pipe coil or ancillary fitting and part of the compressor) for containing compressed air. The group definition is based on the Reservoirs function, material and vehicle classification. ScotRail Trains Limited reserve the right to add or remove the numbers of overhauls per class of train, as the business requires.

## Notice URLs

- http://
- https://api.publiccontractsscotland.gov.uk/v1/Notice?id=ocds-r6ebe6-0000835148
- https://scotrail.wax-live.com/S2C/DisplayModules/TradeModules/Negotiations/Opportunities/ListEvents.aspx
- https://scotrail.wax-live.com/S2C/DisplayModules/TradeModules/Negotiations/Opportunities/ListEvents.aspxh
- https://scotrail.wax-live.com/S2C/DisplayModules/TradeModules/negotiations/Sourcing/DocumentMain.aspx?ProjectId=390&DocumentId=391&ApplicationInstanceID=27adc89e-0cb2-4b51-9bc1-34061f10156f
- https://www.scotrail.co.uk/

## 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-r6ebe6-0000835148. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-r6ebe6-0000835148.json.