They will alert the operator of the need for further Sonomatic utilises the ROV-iT scanner (Figure 4) for such ‘quantitative’ inspection being required in that location to inspections where quantitative results are required from a obtain accurate wall thickness measurements for further specific location. The ROV-iT has been utilised extensively analysis. The focus of screening is therefore often on since 2012 for subsea inspection of un-piggable pipelines providing assurance that the inspection identifies the most down to water depths of 1750 m to date (pressure tested to severe degradation, or at least regions representative thereof. 3000 m). The inspection planning process for unpiggable pipelines The scanners have the capacity to inspect pipelines has the aim of identifying the most effective approach with outer diameters from 6 in. up to 30 in. The two smaller for each situation and ensuring the inspection meets the units are deployed over the side of the ROVSV or through integrity requirements. the moonpool, attached to the front of most modern work The bespoke Sonomatic MAG-ST crawler (Figure 3) has class ROVs. However, the larger ROV-iT 30 must be deployed been utilised on recent campaigns to deploy screening subsea in a work basket, and the ROV will ‘hot stab’ into the techniques such as EMAT/Multiskip, on multiple pipelines at scanner for power and comms operations. <1000 m water depth. These lines were not designed for inline inspection and had been in service for many years, therefore an assessment of their condition was necessary. The inspection to assess their condition had to be performed using external direct assessment methods. Differing diameters and external coating types can result in the inspection being challenging and may require the need for both screening techniques depending on the pipeline specifics. Typically, in one 24 hr offshore period, approximately 320 m of pipeline can be screened with these techniques, resulting For over 65 years SPY® has been an industry in a total of approximately leader in coating inspection equipment. 10 km of pipeline inspection on a two to three week We offer a full line of portable and in-plant offshore inspection campaign. holiday detectors for pipes, tanks, or any Support technologies coated metal surface in the field or in a are required for follow manufacturing facility. up inspections at areas of degradation of concern as identified by the screening inspection. These follow up techniques have the ability to quantify the depth and characteristics of the degradation in detail, supporting the CRA process and allowing fitness wet sponge i n - p l a n t h o l i day p o rta b l e for service assessment to h o l i day d e t e cto rs h o l i day d e t e cto rs d e t e cto r syst e ms be performed. Ultrasonic • Lightweight and ergonomic • Extremely versatile for • Easy to use, no trigger to design hold while inspecting automatic or manual inspection corrosion maps, or C-scans • Accurate, reliable and easy • Tough, ergonomic and • No batteries required, (Figure 1) can be exported in to use reliable operates on 120 VAC .csv file format directly to • Audible and visual alerts • Infinite voltage settings • Multiple accessories a finite element model for available to meet any plant • Available in basic kit or • 3 different voltage ranges line configuration full inspection kit available stress distribution analysis.
I n s p ect any coate d m e tal s u r fac e
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