TEi has extensive experience in plant repair and manufacture in the energy, process and manufacturing industries:

  • Maintenance agreements on a term or call-out basis
  • Management of other associated trades
  • Key spares purchasing and stock holding

Overhauls & Shutdowns:

TEi has, through many years, built up a reputation for the successful completion of overhaul and shutdown work on energy and process plants:

  • Active partnering with clients to achieve minimum downtime and achieve key dates
  • Detailed pre-shutdown planning
  • Management of own direct labour and sub-contractors

TEi has carried out major outages for International and domestic Clients such as BP (Hull), Esso (Southampton), Sita, RWE, Scottish & Southern, Texaco, ConocoPhillips, BASF, Alcan Smelting, EPR, Drax (Ferrybridge) and WRG.

Staff and Labour:

The unique strength of TEi comes from the enthusiasm, dedication and commitment of all employees, many who have continuous employment for over 20 years.

TEi managers, engineers, supervision and direct labour are a well trained group who have a wealth of specialist knowledge, gained by experience and continuous training.

We provide a 24 hour response to many of our clients to cover all unplanned outages using our highly skilled emergency repair team.



The contract, included detailed mechanical design, supply, installation and fabrication of the following:

  • 6 TPS BioSwirl™ wood firing burners per boiler
  • Primary air fans and ductwork
  • Secondary air fans and ductwork
  • Transport air blowers & fuel transport systems
  • FGR and ductwork from stacks

Drax BDS Project

Drax Power Ltd commissioned Shepherd Construction Ltd to act as main contractor to convert three of its six 660MW coal fired boiler units at Drax Power Station near Selby. TEi were engaged by SCL to install the necessary process equipment and piping systems to enable 100% biomass firing.

The Project required the following:

  • Removal of the 30 existing coal feeders.
  • Installation of 31 compressors to supply motive air to the fuel transport system, complete with stand by arrangement.
  • Design, manufacture and installation of 2km of transport airpipe (150mm and 200mm nominal bore) from the compressors to the intermediate storage silo mixing chambers.
  • The design included pressure containment calculations, a full flexibility study including 3D modelling of the system, along with design of the pipe support system to allow for the thermal and operational movements within the piping system.
  • Installation of approx. 8km of product delivery pipework from the intermediate storage silos where it becomes entrained with the product which then delivers the biomass to the filter receiver units.
  • Installation of the Filter receiver units at the feeder floor complete with all secondary steelwork, associated supports and vent pipework.


Boiler Three Re-furbishment-2013

As a specialist contractor TEi were tasked with project managing the refurbishment of no.3 boiler including the management of all sub contractors.

TEi were the Principal Contractor for the project to satisfy the CDM regulations 2007.


Remove and Replace the boiler pressure part systems:

  • Convection bank tubing
  • Furnace D-Tubes Side wall
  • Furnace D-Tubes Rear wall
  • Superheater Protection wall complete with headers
  • High pressure Feed-water pipework
  • Process valves and pipework to Steam/Air/Condensate system
  • Supply design & install Expansion joint to Gas outlet ducting to economiser
  • Boiler casings and expansion joint
  • Compile and submit Hot & Cold Boiler survey

Manage & co-ordinate all Sub-contractors for the project:

  • Refractory
  • Insulation
  • Shot blasting & Painting
  • NDT Inspection
  • Mechanical contractors for Client

 Contract Programme

  • Total project – 44 weeks
  • Off-site fabrication and preparation – 20 weeks
  • Site duration – 24 weeks
  • Mechanical works – 19 weeks
  • Testing and commissioning – 5 weeks
  • Approximate man-hours 44,000

 Mechanical Work

Convection Bank

  • 1441 tubes at 8m expanded into steam and mud drum – 2882, 3 stage expansions
  • 3732 metres of membrane wall seam welding
  • 20 welds – 100% x-ray

Furnace D-tubes – Side WaII

  • 120 tubes at 14m – 240, 3 stage expansions
  • 5760 metres of membrane wall seam welding
  • 360 welds – 100% x-ray

Furnace D-tubes – Rear Wall

  • 44 tubes at 14 metres – 88, 3 stage expansions
  • 2464 metres of membrane wall seam welding
  • 176 welds – 100% x-ray

Fabrication of superheater protection wall header

  • 76 welds 8 inch  and 2 inch diameter – 100% x-ray
  • 864 metres of membrane wall seam welding
  • 2.7 tonnes installed

Fabrication and installation of HP steam pipe

  • 24 – 6 inch diameter welds c/s and s/s -100% x-ray