Economisers/Heat Exchangers

A&J Fabtech is the UK’s largest manufacturer of bespoke economisers and heat exchangers. We can offer design and manufacture for a wide variety of applications and duties and have references for Coal Fired Power Stations, Energy from Waste Sites, Gas Fired Boilers, Sludge Incineration facilities to name but a few.

Welded Gill Economiser Plain Tube Economiser

The largest units we have built so far are 500MW units for UK Coal Fired Power Stations and the smallest units are heat recovery systems for package boilers.

Supply options range from complete units with casings and headers supplied as a built up units, or loose coils, supports and headers typically on larger units that have to be built up on site.

The choice of heat recovery surface and materials of construction are carefully selected to suit the fuel and operating environment. This may be plain tube, cast iron, spiral fin, aluminium fin or welded gill. Typical materials include carbon steels, alloys, ferritic and austenitic stainless steel.

Didcot Economiser in our workshop Pressure testing of Coventry Economiser coils

Critical materials such as the base tube are only ever sourced from Western European suppliers, typically UK, German or French Steel Mills. All finning is carried out within the EU. A&J Fabtech have an exclusive supply agreement for finned tubes (except aluminium fin) with Ekstroms of Sweden and all A&J’s extended surface units will utilise Ekstroms extended surface tube.

Pressure parts of this nature have to endure arduous round the clock service in the harshest of environments often with little or no opportunity to stop plant for access to inspect or repair. Quality is therefore of the utmost importance, and all assembly and welding is carried out in our UK factories to approved weld procedures and by qualified welders. Welds are typically subjected to an on site radiographic examination 10-100% to prove weld quality. In addition finished units are subject to a hydrostatic pressure test in the presence of a notified body.

Inspection is carried out internally by our full time works inspector and welding engineer and additional surveillance visit are made by nominated third party inspection authorities such as Lloyds, RSA etc.