District Heating NDT Inspection


At WHE NDT we specialise in thin wall pipe inspections commonly found in underground and over ground District Heating networks. Our team have developed advanced Phased array and traditional ultrasonic inspection methods and techniques, that allow for a very conclusive and efficient weld inspection. We work with our customers to provide a JIT service that allows them to excavate, pipe fit, weld, NDT, sleeve, backfill and reinstate, efficiently.

Our DH projects take us all over the UK and Ireland but the majority take place local to us in London.

Ultrasonic Testing (UT) & Magnetic Particle Inspection (MPI)

By employing our specially developed manual UT technique, we are able to offer complete coverage of the weld root and body, which otherwise wouldn't be possible. This combined with surface inspection methods has proved to be a comprehensive, popular and cost effective service.

Phased Array Ultrasonic Testing (PAUT) & Magnetic Particle Inspection (MPI)

PAUT combined with a MPI is the best way to inspect DH pipework. It offers the most thorough and conclusive inspection to the weld root, body and cap without the huge safety restrictions and costs associated with X-ray.

The PAUT scan data is collected during inspection, assessed, stored and presented to the customer with the report.

Compared to manual UT that has a single probe firing one element at a fixed angle, the PAUT's probe fires 32 elements all at customisable angles, sweeping the entire weld in the most systematic way to find potential defects lurking in the weld or HAZ.

Due to the advanced technology of the PAUT set, when defects are found, the data is presented in such a clear way it is very simple to explain and show the client and on site welders where the repairs need to be made. This eliminates any doubt and repairs can be quickly rectified.

A clear trend is being been made towards standardising 100% PAUT inspections in district heating. Here at WHE NDT we are proud to be big advocators of this, assisting our clients in making the change towards the next step in district heating installation quality.

London Projects

  • Anthems Way Stratford

  • Abbey Road Development

  • Ashley Road Development

  • Blackhorse Lane Developments

  • Blackwall Reach Developments

  • Boston Road P1 & P2

  • Chobham Manor P1, P2, P3 & P4

  • Cherry Park Stratford

  • Clapham Park Regeneration Scheme

  • Clapham Common

  • Colindale Gardens

  • Colindale Grahame Park

  • Copper House Green

  • Craik Court Peel Development

  • Engie, Excel District Energy Centre

  • Enfield - New Avenue Heat Network

  • Elephant & Castle Network

  • Farringdon Mount Pleasant - Post office

  • Greenford Green Developments

  • Greenwich Design District

  • Greenwich GMV

  • Imperial College London P1 & P2

  • Kings Cross P1, P2 & P3 (Including Facebook & Google)

  • The 02 Greenwich / Millennium Dome (Main Line)

  • The Perfume Factory

  • Milbrook, London

  • Nine Elms US Embassy Connection

  • Nine Elms One Thames City

  • North London Heat & Power

  • Park Royal Regency Heights

  • Pool Street Stratford

  • Ponders End

  • Queen Mary University of London

  • Southmere, Thamesmead Regeneration P1 & P2

  • Springfield Hospital P1 & P2

  • St Silas Estate Camden

  • Stratford Waterfront (BBC, Sadler’s Wells, UAL’s London College of Fashion, University College London and the Victoria and Albert Museum)

  • Stratford International Quarter

  • Summer Street Southwark

  • Sugar House Island Development

  • Upton Park Development

  • Walthamstow Forrest Town Hall Development

  • Wandsworth - Old Homebase Site

  • Wandsworth - Old B&Q Site

  • Westhorp Gardens Development

Nation Wide