TEi

What TEi does

TEi Industrial Services Ltd is a privately held UK engineering construction organisation headquartered in Wakefield, West Yorkshire, with regional offices in Cardiff and Rochester and a heritage dating to 1845. Operating across six integrated service divisions — Engineering, Repair & Maintenance; Mechanical & Thermal Design; YIMPACT Heat Exchanger Services; Steam & Boiler Spares; Welding Development; and Metallurgical Laboratory Services — TEi delivers design, supply, repair, maintenance, and site installation services to operators of fossil fuel, biomass, and combined heat and power plants, as well as oil refineries and petrochemical facilities. Its YIMPACT division claims 95% of all major condenser retubes carried out within the UK over the last 20 years.

The company's technical platform centres on proprietary inspection and welding capabilities, including a high-speed eddy current tube inspection system (the only one of its kind in the UK, capable of inspecting up to 2,000 tubes per day), DC Saturation Eddy Current (MAGWAVE) technology, Foster Wheeler-derived orbital welding techniques, and an in-house metallurgical laboratory equipped with a Hitachi SEM-EDX, Spectrolab MAXx OES, and UKAS-accredited Spark-OES analysis. TEi maintains a CSWTO-accredited welding school and ECITB-approved apprenticeship programme, supporting both internal capability and external training revenue streams.

Commercially, TEi generates revenue through project-based and contract-based professional services, including multi-year maintenance agreements (5-year contracts confirmed with Valero and Intergen), principal contractor outage work (e.g., 58-company, 621-person site at Ferrybridge 1), and supply of remanufactured spares for legacy Foster Wheeler equipment. Named enterprise clients include Drax, RWE, BP, Ineos, Valero, Total Lindsey, Centrica, Intergen, enfinium, and SRCL. Distribution is direct field sales through regional offices, supplemented by international offshore engagements such as FPSO boiler inspection in the South China Sea. Revenue figures are not publicly disclosed.

Name

TEi

Legal name

TEi Industrial Services Ltd

Website

https://tei.co.uk

Company type

Private

Founded year

1845

Operating status

Operating

Headcount range

251–500 employees

Short description

TEi Industrial Services Ltd is a UK engineering construction organisation serving power generation, petrochemical, and refining clients with design, maintenance, heat exchanger (YIMPACT), welding, spares, and metallurgical laboratory services across regional UK offices.

Ownership category

akta.pro rank

Product category

Engineering Construction and Maintenance Services for Power Generation and Petrochemical Industries

NAICS

Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance (8113), Boiler, Tank, and Shipping Container Manufacturing (3324), Industrial Process Furnace and Oven Manufacturing (333994)

SIC

Fabricated Plate Work (Boiler Shops) (3443), Industrial Process Furnaces & Ovens (3567), Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

Refractory, Furnace & Kiln Maintenance Services (IMAIACAG)

Keywords

• Engineering construction services
• Power generation maintenance
• Petrochemical plant services
• Heat exchanger refurbishment
• Boiler maintenance services

Headquarters

HQ city

Wakefield

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Engineering, Repair and Maintenance Services: Project-based and contract-based services for power generation and petrochemical industries. Includes long-term maintenance contracts (5-year contracts mentioned), outage/shutdown work, and emergency repair services. Revenue generated through direct labour, subcontractor management, and materials supply.
2. Heat Exchanger and Condenser Services: Specialized condenser and heat exchanger refurbishment services including eddy current inspection, retubing, and tube replacement. Services delivered on project basis for power station outages.
3. Steam and Boiler Spares: Supply of spare parts for boilers and incinerators, including genuine remanufactured spares. Component manufacturing for obsolete equipment using original drawings.
4. Technical Design and Consultancy Services: Design, engineering, commissioning and consultancy services provided to external customers and internal divisions. Includes computer modelling, condition assessment, and engineering studies.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

TEi Industrial Services Ltd provides design, supply, repair, maintenance and site installation services to the power generation and petrochemical industries across the UK. Its integrated service portfolio covers Engineering, Repair & Maintenance (including outage and shutdown support), Mechanical & Thermal Design, YIMPACT Heat Exchanger Services (inspection, refurbishment and retubing), Steam & Boiler Spares, Welding Development (including CSWTO-accredited welder training) and Metallurgical Laboratory Services. Work is delivered through direct regional field sales teams backed by in-house metallurgical, welding and machining capabilities.

Product overview

TEi Industrial Services Ltd is a UK-based Engineering Construction Organisation providing specialized services to the power generation and petrochemical industries. The company operates as a single unified service offering with multiple integrated divisions including Engineering, Repair & Maintenance, Mechanical & Thermal Design, YIMPACT Heat Exchanger Services, Steam & Boiler Spares, Welding Development, and Metallurgical Laboratory Services. These services are delivered through centres of excellence with specialized expertise in engineering studies, mechanical and thermal design, heat exchanger tube services, metallurgical laboratory services, and welding development & welder training. The company operates from regional offices in Northern (Wakefield Head Office), Southern (Cardiff), and South East (Rochester) locations, serving clients throughout the UK and internationally.

Differentiator

Problem solved

Functional benefit

Brands

• YIMPACT: Heat Exchanger and Condenser Services division providing inspection, refurbishment, and retubing services for condensers and heat exchangers in power plants. Claims to have carried out 95% of all major condenser retubes within the UK in the last 20 years.

Products and services

• Engineering, Repair & Maintenance Comprehensive plant repair, overhaul, shutdown and maintenance services for energy, process and manufacturing industries, including long-term maintenance agreements, key spares purchasing and 24-hour emergency response. Targeted at power station, refinery and petrochemical operators during planned outages and unplanned events.
• Mechanical & Thermal Design Technical design and engineering services including computer modelling of thermal and mechanical design, condition and remnant life assessment, plant commissioning, pipe stressing, fuel conversion studies and consultancy services for power and petrochemical plant upgrading. Delivered by the Technical Services Division to external customers and internal divisions.
• YIMPACT Heat Exchanger Services Specialist condenser condition assessment, inspection, refurbishment and full retubing services including eddy current inspection, tube leak testing, partial and full retubes, and high-speed tube inspection for power plant heat exchangers. Includes the Foster Wheeler internal bore welding retubing technique.
• Steam & Boiler Spares Boiler and incinerator spares manufacturing, servicing, emergency repair and life extension programmes covering Foster Wheeler boilers and older equipment no longer in production, including genuine remanufactured spares manufactured from original Foster Wheeler drawings and 24-hour emergency callout capability.
• Welding Development Welding procedure development, welder training and qualification, in-house CSWTO-accredited welding school and specialised welding services including orbital TIG, Inconel overlay (MIG overlay), temperbead welding and stud welding for power and petrochemical industries. Procedures pre-qualified to ASME IX and BS EN ISO 15614-1 covering carbon, low alloy creep resisting, stainless, duplex, superduplex, high temperature alloys, nickel alloys, cast iron and hardfacing.
• Metallurgical Laboratory Services Metallurgical testing and analysis services including Rockwell hardness testing, Spectrolab MAXx OES chemical analysis, Hitachi S-3400N SEM failure analysis with EDX elemental composition, and UKAS-accredited Spark-OES chemical analysis of low and high alloy steels. Serves internal projects and external customers requiring failure investigation and material verification.

Quantifiable outcome

• 95% of all major condenser retubes within the UK in the last 20 years carried out by TEi Yimpact services
• +4 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Four partnerships are on record, tiered minor, core and legacy.

• University of Huddersfield (Team HARE)minorStrategic or Co-development Partner · 1 December 2019Collaboration to manufacture frame for Formula Student vehicle. TEi provided fabrication and welding capabilities for motorsport application. Vehicle placed 2nd out of British Universities and 5th globally out of 80+ Universities.
• Castleford AcademycoreStrategic or Co-development Partner · 10 March 2014Partnership supporting young students to become engineers of tomorrow. Partnership in 5th year as of 2014. TEi provides annual funds to enable school to upgrade equipment and support engineering programmes. Opened TEi Engineering Room within newly built technology block.
• Engineering Construction Industry Training Board (ECITB)coreStrategic or Co-development PartnerAnnual recruitment of apprentices in conjunction with ECITB. Apprentices successfully complete NVQ level 3 in various trades. Company is in-scope to ECITB providing current industry standard training to all employees at all levels.
• Foster WheelerlegacyTechnology or IntegrationTechnical Services Division originated from Design and Engineering office of Foster Wheeler Power Products Limited purchased from Foster Wheeler in 1988. Heritage includes standards and computer software developed over many years. Company can manufacture components using original Foster Wheeler drawings.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Sulzer: Sulzer provides rotating equipment services, repair, and parts to power and process industries, offering comparable industrial maintenance and refurbishment services for pumps, turbines, and heat exchangers.
• Bilfinger UK: Bilfinger's UK industrial services division delivers maintenance, repair, and shutdown services to power generation and petrochemical clients, directly competing with TEi for outage and maintenance contracts at major UK sites.
• Voith Hydro: Voith provides power plant engineering services, maintenance, and modernization for steam and hydro plants, serving overlapping customers in UK and European power generation.
• Altrad: Altrad is a major industrial services contractor providing scaffolding, insulation, mechanical maintenance, and shutdown services to UK power and petrochemical clients, competing for the same outage contracts.
• Spirax Group: Spirax-Sarco specializes in steam systems, boiler equipment, and related services for industrial customers, overlapping with TEi's Steam & Boiler Spares and condensate/heat exchanger expertise.
• Doosan Babcock: Doosan Babcock is a specialist power boiler OEM and service provider in the UK, competing directly with TEi on boiler inspection, refurbishment, and outage services for UK power generators.

Broad incumbents

• Wood Group: Wood is a global engineering and consultancy firm serving power, refining, and petrochemical end-markets with maintenance, modifications, and asset support services that overlap with TEi's offering at a much larger scale.
• Stork (Fluor): Stork, part of Fluor, provides asset integrity maintenance, modification, and industrial services to UK and European power, refining, and chemical clients, serving as a broader-scope incumbent in the same space.

Emerging players

• Cavendish Nuclear: Cavendish Nuclear provides specialist welding, fabrication, and inspection services to the UK nuclear sector — adjacent to TEi's welding and metallurgical capabilities with overlap on exotic alloy procedures and CSWTO-level welder training.

Regional players

• EnergySafe Solutions: EnergySafe Solutions is a smaller UK-based engineering services firm offering boiler and pressure system maintenance, overlap with TEi's regional shutdown/outage work but at lower scale and narrower footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/tei-limited
• Xx.com/teiuk
• Facebookfacebook.com/TEiUK

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TEi