RMS2 High Speed Remote Access C-Scan Corrosion Mapping

  • Fully integrated remote C-scan system
  • Very high productivity 17 m²/8 hr shift
  • Very high accuracy scanning
  • Full off line analysis and re-processing
Key Features:
  • Very high speed for fast coverage with real time image display
  • High probability of detection with up to 0.5 mm scan grid
  • Wide range of applications up to 170 ˚C
  • Inspection material thickness up to 150 mm
  • 3D data view for internal/external profile
  • Can be used on any ferrous item form 6” NB to flat plate
  • Longitudinal scanning head for increased productivity on crude oil transfer lines, slug catchers and the like
  • Up to 50 metre long x 1 m wide scan data acquisition feasible in one location
  • Field proven durability & reliability
  • Aid to reduce maintenance costs by minimising use of scaffolding
  • No paint removal required
RMS2 600
RMS2 450
RMS2 300
RMS2 ARC
Inspection Capabilities:
  • Localised / generalised pitting
  • General corrosion
  • Laminations
  • Hydrogen blistering
  • Hydrogen induced cracking (HIC)
  • Stress corrosion cracking (SCC)
  • De-bonding of internal liners
Software Key Features:
  • Integrated scanner control, data acquisition, analysis and reporting tools
  • Real-time A-scan and C-Scan display during scan
  • Fully captured A-scan and gate configuration for post inspection analysis
  • Full scan replay with multiple gates
  • Near side (external) defect sizing
  • Far side (internal) defect sizing
  • Up to 20 A-scan gates - Several gate types:
    • Peak
    • Flank
    • Fixed position (Can be used for top surface corrosion)
    • Amplitude
  • Up to 19 C-scan layers for data review
  • Sizing tools, length, area, statistical
  • A-scan, B-scan, C-scan and 3D views
  • Export C-Scan data as .CSV files for MS excel

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.

Pipeline Corrosion mapping inspection
Vessel Corrosion mapping inspection
Tank Corrosion mapping inspection
Pipeline Corrosion mapping inspection
Vessel Corrosion mapping inspection
Tank Corrosion mapping inspection

Flexible solution

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.

Scanning heads

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.

RMS ultrasonic software setup
Software Setup
Integrated scanner control, data acquisition, analysis and reporting tools
User friendly interface
User friendly interface
Quickly hide infrequently used controls
Restore hidden controls with one click
Save favourite screen layouts
Ultrasonic post inspection analysis
Post Inspection Analysis
The ultrasonic A-scan data, C-scan image and gate information are saved for detailed post inspection analysis
Hydrogen blistering detection
Inspection Capabilities
Scan showing 2D & 3D Images of hydrogen blistering
C-scan minimum and maximum thickness
Defect Measurements
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.

RMS2 600
RMS2 450
RMS2 300
ARC 24-36
ARC 36-48
meters
inches
meters
inches
meters
inches
meters
inches
meters
inches
1
Min Internal Circumferential
2
79
1
40
2
79
N/A
N/A
N/A
N/A
2
Min External Circumferential
0.65
26
0.152
6
0.65
26
N/A
N/A
N/A
N/A
3
Min Internal Longitudinal
5.6
211
N/A
N/A
1.65
65
N/A
N/A
N/A
N/A
4
Min External Longitudinal
5.5
217
N/A
N/A
1.4
56
0.6-0.9
24-36
0.9-1.2
36-48
Flat Plate
N/A
N/A
Ultrasonic Technical Specification
Pulse Voltage
-40 to -300, 256 steps
Pulse Width
50 ns to 320 ns in 20 ns step
Damping
500Ω
Receiver Gain
0 dB to 80 dB in 0.1dB increments
Filter
0.6 MHz to 18MHz fixed
Waveform
Full rectify, + half rectify, - half rectify, or RF
Sampling Rate
50 MHz
Resolution
8 bits (0 to 255)
Waveform Length
1 to 8190
Trigger Source
+external, -external, internal or software
Transducer Range
1 to 10 MHz
Post trigger delay
0 to 16,370 samples in 1 sample step
Probe Specification
5 MHz 50 mm focus - Thickness range 6 – 12.5 mm, (0.25”to 0.5”)
5 MHz 75 mm focus - Thickness range 12.5 – 50 mm (0.5” to 2”)
Optional Transducer Specification
10 MHz 40 mm focus - Thickness range 1 – 6 mm, ( 0.04” to 0.25”)
2.5 MHz 75 mm un-focused - Thickness range 50 – 150 mm ( 2” to 6”)
5 MHz dual - 2 mm to 100 mm (0.08” to 4”), requires adapter
Other Available on request
Common Scanner Specification
Scan grid
0.5 to 150 mm in 1 mm steps (0.02” to 6”) independent X and Y
Max scan length
60 m (200 ft) at 10 mm (0.4”) grid
Auto- position
Scanner movement to origin or selected point
Scanner identification
Automatic
Scanner control
Joystick controller and software

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