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Specialised Tube Inspection Services

Industrial heat exchangers are vital to the economic operation of many processes in the oil, gas and power generation industries.

Very often the heat exchanger tubes have lower reliability than associated equipment. They pose a unique inspection problem which has been addressed by Torch Integrated Inspection Services who have developed a comprehensive service offering the latest testing technology for the examination of both ferrous and non-ferrous tubes. The inspection methods employed are both well established and commercially acceptable to industry within the UK and Internationally and include:

  1. Internal Rotary Inspection System (IRIS) 3000 / 9000 the latest in microprocessor based equipment for the ultrasonic inspection of tubing.
  2. Magnetically biased electromagnetic equipment such as Dinsearch 100 or Centest 91 for the rapid inspection of ferromagnetic tubing.
  3. Multi frequency Phase Analysis Eddy Current Systems for the rapid inspection of non-ferromagnetic tubing.
  4. Computerised Analysis Storage and Reporting Systems. Torch Integrated Inspection Services operates the Automated Tube Inspection System (ATIS) for the computerised analysis and storage of inspection data from the above electromagnetic techniques. This includes an integral package with colour coded tube sheet drawing and statistical facilities.

By combining these systems the inspection package can be customised to suit each client’s requirements. For example the IRIS is a highly accurate but relatively slow system, while Dinsearch, Centest and Eddy Current testing are much more rapid but less accurate. When a rapid inspection giving a general indication of tube condition is required then either Dinsearch or Eddy Current would be used, depending on the tube material. When highly accurate results are required and time is less of a factor IRIS would be applied. When both high productivity and reasonable accuracy are essential then the systems are combined, with IRIS being used to cross-check a percentage of the tubes inspected by rapid systems. This approach ensures that the clients get the most cost effective inspection to meet their requirements. Our technicians are highly trained and certified under the PCN or ASNT schemes for ultrasonics, surface inspection, eddy current testing and visual examination.

In addition, specialised tube inspection training has been undertaken by highly experienced technical personnel. This has included both classroom and directly supervised “in-field” training. In addition to specialised tube inspection the service can include design advice, fabrication and/or repair facilities, heat treatment, welding and metallurgical consultancy and additional NDT services. These facilities are all available within the Motherwell Bridge Group and can be activated on a single source basis thus giving savings on both time and financial aspects.