Silverwing is now part of Eddyfi Technologies

How do you manage and report your corrosion inspection results?

TRAC Oil & Gas Ltd (TRAC) were recently commissioned to carry out a Non-Intrusive Inspection (NII) of a 26 metre long vessel on board an Offshore Platform in the unforgiving environment of the North Sea.

The challenge: to efficiently corrosion map as near as possible 100% of the shell including the dome ends whilst the vessel remained in-service and to accurately report the findings enabling the engineer to make informed decisions.

TRAC utilised Silverwing’s RMS2 450 corrosion mapping system as the primary inspection tool which performed admirably, working continuously during the 12 to 14 hour shifts. The majority of the inspection was conducted at a 5 x 5 mm scan resolution with any areas of concern scanned in more details at a 1 x 1 mm resolution. The dome ends were scanned using the RMS2 300 which is designed for smaller areas with the advantage of pivoting tractor motors allowing it to scan various shapes.

A total of 260 scans were collected using the RMS2, an average of 2 metres long. As you can imagine that is a lot of data to analyse and report, which can sometimes take longer than the actual inspection time.

RMS2 Vessel Corrosion Mapping
RMS2 Vessel corrosion mapping

TRAC decided that this was the ideal time to try out Silverwing’s new CMAP corrosion inspection and management software. Paul McLean, TRAC’s Specialist NDT Technician spent two days using the CMAP software with the Silverwing engineers and as a result,

1. Stitched together all the 260 RMS2 scans
2. Positioned them correctly and to scale over a CAD drawing of the vessel
3. Analysed all the UT results
4. Produce a draft report for his customer

CMAP Inspection analysis
CMAP inspection data analysis

The result: a complete electronic overview of the inspection which could be drilled down into individual measurements, with areas of concern highlighted along with supporting A-scan’s and B-scan profile views.

The reporting process saved approximately 10 days of “cut and paste” and other non-value added time enabling Paul to focus on the more important analysis work. Words like 'fantastic' 'phenomenal' 'amazing' were spoken by Paul.

Paul was very happy, as he thought he was going to have to work yet another set of long shifts through the weekend to get this report in shape before moving on to the next inspection. Instead he managed to spend the weekend salmon fishing in Scotland with a few friends.

CMAP inspection overview
CMAP inspection overview

Please click the below links more information on any of the systems and software used within this news article

RMS2 300 & 450
CMAP Software

TRAC Oil & Gas

Thistle Road
AB21 0NN

+44 (0)1224 725800