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The Royal Mint Remote Cleaning & Inspection

Our Success Story

Inspectahire was contracted by The Royal Mint in Wales for the ongoing project to clean and carry out RVI Inspection of the Seco Warwick Retort.


The Inspectahire team deployed December 2021 to affect Water Jetting of a Retort using HP Retro-jetting techniques for the removal of Zinc Oxide and Brass deposits from the internal bore of a Retort Cylinder at The Royal Mint facility in Wales.

The retort required remote cleaning by mounting the BJV Rotary Nozzle onto the P448 Tractor system. This allowed the cleaning to take place in the retort using UHP Water Jetting.

The was then followed up with a Close Visual Inspection using the same P448 Tractor Camera.


The inspection was undertaken from the open end of Seco Warwick Retort. Simultaneous warehouse operations were being carried out in the general work area as per normal site operations. All electrical equipment was tested by an Inspectahire electrician and verified that it was fit for use. The P448 Explosion Proof Crawler/Tractor with Pearpoint P494 Camera with a full 360° pan and tilt for maximum viewing capacity was energised and tested. The Tractor was then inserted into the Seco Warwick Retort and a preclean inspection of the Retort up to 19 metres where the propeller type assembly stopped any further progress of the P448 Camera System.

The P448 Tractor was then fitted with the BJV Rotating Jet Head and a cleaning run at 20,000 psi was conducted. After the Tractor System had done a couple of runs back and forth along the Retort a further camera inspection was undertaken. This process was then repeated with a stepping up of pressure to 27,000 psi and then 32,000 psi. The survey was recorded onto mini digital tape to be reviewed by Inspectahire upon return to Aberdeen.


The Retort was cleaned and inspected from the start to approximately 18.6 metres where the propeller type assembly stopped the cleaning operations. The majority of the debris/coating within the Retort was removed during the cleaning operation. A few areas still had some Brass type coating and blanks attached to the inner surface.

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Equipment Used

  • pearpoint-p448-ex-tractor-side-w480h315

    Pearpoint P448 EX Tractor

    The speed and stamina of the P448 Explosion Proof Tractor means more inspection meterage per day...

    View the equipment