The RMS2 is a high speed, high accuracy remote access ultrasonic corrosion mapping system designed to evaluate the condition of ferrous structures such as storage tanks, pipelines, pressure vessels and other critical equipment, supporting effective and safe operation.
The RMS2 can give 100% coverage in a band up to 1000 mm wide, significantly increasing Probability of Detection (POD) of corrosion, enabling engineers to determine the optimum repair strategy and improve risk life assessment (RLA) & risk based inspection (RBI) maintenance programs.
The RMS2 is extremely flexible with a range of scanning heads to suit different inspection requirements.
All RMS scanning heads share the same ruggedised control unit and reporting software so different scanning heads can be used to meet inspection requirements.
The RMS2 Control Unit houses the power module, motion control system, ultrasonic pulser / receiver and video camera controller. All RMS2 scanning heads feature low profile tractor units incorporating high torque stepper motors and powerful magnetic drive wheels.
A single crystal immersion transducer is held in a gimballed probe holder ensuring it remains perpendicular to the surface and allowing it to ride over weld caps & lap joints up to 8 mm high. A stainless steel wear plate prevents transducer damage when scanning over rough surfaces.
The immersion type transducer enables simultaneous mapping of both top surface and back wall corrosion, which is easily visualised using the 3D C-scan presentation, something unachievable in standard contact probe solutions. A range of transducer frequencies are available to suit specific material thicknesses, and when combined with the optional extended probe holders allow the RMS2 to inspect material up to 150 mm thick.
The scanning heads can be controlled with either a joystick or on screen controls in the RMS software. When the scanner mounted video camera is used, the image is displayed on screen aiding positioning of the crawler when operator view is obstructed.
As standard a 15 metre combination umbilical cable is used for ultrasonic data transfer, control instructions and couplant supply. For taller structures or large diameter vessels there is an optional 30m umbilical cable.
The RMS2-600 scanning head is designed to maximise scanning rates on large surface areas such as tank shells, pressure vessels and other structures.
The RMS2-450 scanning head is designed for operating circumferentially on curved surfaces such as pipelines or pressure vessels from 152 mm (6 inches) up to flat plate.
The RMS2-300 scanning head is designed as a general purpose scanner for inspecting areas with limited access or other applications where smaller scan widths are required.
The latest additions to the range of RMS scanning heads are the RMSARC 24 -36 and 36-48, designed to operate longitudinally on pipe diameters from 24” to 48”. The combination of longitudinal pipe scanning and 60° scan width brings a major improvement to inspection efficiency for pipeline applications while maintaining the high standard of data quality associated with the RMS2.
RMS2 Drive System
The RMS2 Motion Control Unit allows RMS scanning heads to be used with third party ultrasonic systems. This system houses the power module, motion control system and X / Y encoder outputs and is supplied with dedicated scanner control PC software but excludes UT hardware and data acquisition software. It can be upgraded by approved service centres to full RMS2 system.
Data Acquisition Software
The RMS software integrates scanner control, data capture, data analysis and reporting tools. The software shows a real-time display of the ultrasonic A-scan, C-scan, thickness measurement and positional data, with a maximum resolution of 0.5 mm x 0.5 mm. All of this information is recorded when a scan is saved.
The modular user interface, has been designed to hide and restore infrequently used controls, with a single mouse click, and save specific screen layouts for future use.
The ultrasonic controls are similar to those on a standard ultrasonic flaw detector so a trained ultrasonic operator can quickly become familiar with all functions.
Integrated scanner control, data acquisition, analysis and reporting tools
User friendly interface
Quickly hide infrequently used controls
Restore hidden controls with one click
Save favourite screen layouts
Post Inspection Analysis
The ultrasonic A-scan data, C-scan image and gate information are saved for detailed post inspection analysis
Scan showing 2D & 3D Images of hydrogen blistering
Measurements can be taken from the C-scan with the option to find minimum and maximum thickness
C-Scan Layers & Multiple A-Scan Gates
The software is designed around the concept of C-scan ‘layers’. This allows the RMS operator to quickly switch between each of the multiple C-scan views generated. During a scan, the A-scan trace and resulting C-scan image are shown within the RMS software in real time.
Multiple A-scan gates can be added to measure between several parts of the A-scan trace. This means it is possible to measure the signal amplitude, part thickness, internal surface profile and external surface profile simultaneously. After acquisition the scan can be re-analysed by adjusting gate settings to produce a more accurate C-scan image, or highlight particular indications. This powerful tool minimises the need for re-scanning due to changes in surface condition or minor set-up errors.
Post Inspection Analysis & Reporting
The RMS software automatically stores the A-scan data, C-scan image and gate information. Once a scan has been completed, the data can be analysed using a range of display options including A-scan, B-scan, C-scan and 3D C-scan views. The X and Y position and the recorded thickness measurement are displayed next to the cursor while the cursor is moved or hovered over the C-scan image. A 2-axis B-scan thickness profile is displayed above, and to the side of the c-scan image.
C-scan layers can be used to display a rotating 3D C-scan view of the saved scan. This view shows the thickness of the part, and also the external surface profile, and the internal surface profile. All A-Scan, B-scan and C-scan views can be either printed directly from the software, or saved as digital images in order to create a detailed report.