Non Destructive Testing & Inspection Reports

Flooded Member Detection Services (FMD)


As offshore structures get older there is a need for a method of economically detecting subsea component failure. FMD is such a method – it determines whether a structural component is flooded, partially flooded or dry. FMD identifies where components have through-wall defects, whether caused by damage or fatigue. FMD is reliable, rapid and more cost-effective than conventional diver and ROV inspections. Additionally, FMD can deliver immediate and repeatable results and can be performed by either ultrasonic or radiographic techniques.

The advantages of the radiographic techniques are that it is significantly quicker (no requirement to remove marine fouling) than ultrasonic methods. Dive Works utilises the “SureFlood” system, which is a state-of-the-art gamma radiographic system and incorporates the latest technology and inspection developments.

Cathodic Protection (CP)


A cathodic protection (CP) system protects an infrastructure asset such as a subsea pipeline, marine pile, offshore platform or other metallic structure from corrosion.

Corrosion is a leading cause of premature failure in metallic structures. Operators can extend the service life of their facilities and equipment by installing cathodic protection systems (CP systems) and testing them regularly.

Dive Works provides CP system monitoring via an ROV mounted CP monitoring probe. The CP monitoring probe enables readings of the cathodic potential of a subsea structure to be taken, enabling an inspector to determine the effectiveness of the system.

The CP monitoring probe also enables the ability to determine if anodic protection is working correctly and help identify unprotected areas on subsea structures.

Underwater Thickness (UT) Readings


Ultrasonic thickness gauges use acoustic echo techniques to determine the thickness of structures and materials underwater.  This involves the generation of a sound wave, and the measurement of time taken for a far side echo’s to pass through the material of the structure under test.  Measurement data is transferred from the ROV mounted probe up to the surface via the ROVs umbilical cable. Dedicated software displays the measurements and logs all test data.

Typical applications include deep water pipeline inspection, ship inspections, lock gate, pier and piling inspections.

Key Features


  • Measures metal thickness to determine wastage or corrosion, accurately, quickly and without removing surface coating.
  • Dedicated software displays the time, date and thickness readings on the surface and all of these measured results can be stored.
  • Designed specifically for metal thickness and corrosion checks on all steel structures and pipelines.
  • Greatly reduces inspection time and cost.
  • Measures on rough corroded surfaces.
  • Range of thickness equals 1mm to 250mm thickness.
  • Fast, accurate and reliable readings.

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Dive Works Subsea Solutions utilise a fleet of world class Remote Operated Vehicle’s (ROVs), commercial divers and project management expertise to deliver a suite of innovative technology-based subsea solutions to clients in Australia and South East Asia. Contact us today to discuss your next subsea project.

head office

5/30 Access Way, Carrum Downs Victoria, Australia 3201

PO BOX 63, South Hobart
Tasmania, Australia 7004

Australia: 1300 586 400

+61 3 9708 2632

info@diveworks.com.au

regional office

82 Queen Street, Sandy Bay, Tasmania, 7005, Australia

03 6225 6738

info@diveworks.com.au