Furnace Services


Furnace inspection


Furnace Piglet®
The so-called second generation Furnace Piglet® is for the inspection of furnace tubes, whether they are smooth, studded or finned. The A.Hak Industrial Services designed Furnace Piglet® is an intelligent free-swimming tool that is capable of inspecting the tubes and bends of the furnace, with a minimum impact on shutdown time.

Prior to a furnace inspection it is essential to clean the furnace thoroughly to remove all the cokes in order for the ultrasound to penetrate the pipe wall. The proven A.Hak Decoking Technology (HDT) provides excellent cleaning results. When combined with Furnace Piglet® inspection technology, it is possible to guarantee the cleanliness of the furnace tubes.

High quality cleaning and inspection contributes to the integrity of the furnace, resulting in minimal shutdown time. Regular cleaning and inspection increases the reliability and continuity of your furnace and knowing the remaining wall thickness of the furnace tubes can also lengthen their lifecycle and prevent unwanted shutdowns.
A-scan data
The compact, lightweight, modular design of the Furnace Piglet® allows a user-friendly, high performance, ultrasonic inspection of furnace tubes and bends with all ultrasonic measurements stored internally. The storage of the raw A-scan data enables highly accurate and reliable data analysis. The final report is presented the day after the inspection when the results of the cleaning, if needed, and minimum wall thickness per tube are presented. The report contains a brief overview in graphical and tabular format linked to the furnace layout as well as detailed C-scan graphics for each tube.
The Furnace Piglet® is typically configured with:
  • Disk for sealing and centralization (4" to 8")
  • Piglet® UT-sensor body with fixed transducers
  • Onboard data storage (A-scan)
  • Flexible couplings for passing bends.
Why use A.Hak Industrial Services’ Furnace Piglet®:
  • Inspection time has minimum impact on shutdown time.
  • Passing bend radii ≥ 1.0 D (smaller on request).
  • Bi-directional, compact, lightweight, modular design.
  • In-house developed, tested and operated.
  • Reporting within 24 hours.
  • Reporting conforms to API579, ASME FSS-1/2007.
  • Reporting and inspection executed by qualified NDT specialist.
  • Storage of raw A-scan data to enable accurate and reliable data analysis.
  • C-scan of full furnace in report.
  • Corrosion growth comparison capabilities.
  • Ability to modify the tool for specific situations.

A.Hak Industrial Services B.V.
Steenoven 2-6
4196 HG Tricht
P.O. Box 151
4190 CD Geldermalsen
The Netherlands
T +31 (0)345 579 211

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