Guided Wave Ultrasonics

WAVE MODES 

The primary wave modes used in the MsS technology are:  

• Torsional waves (for pipes and tubes) 
• Horizontally polarized shear waves (for plates) 
• Longitudinal waves (for bridge cables) 

MSS INSTRUMENT AND PROBES 

In conjunction with SWRI we have pioneered magnetostrictive sensor technology, which continues to gain international prominence, and have recently upgraded our latest system, the MsSR® 3030and the MsSRv5, which uses acoustic guided waves to detect flaws in:  Pipelines Steel cables Anchor rods Heat exchanger tubing Metal structures 

We significantly reduced the system's size and weight, improved graphical user interfaces (GUI), and enhanced control and data acquisition capabilities.  

The features of the second-generation MsSR 3030 and the fifth-generation MsSRv5 include:  

• Computer-controlled through USB communication 
• Small and lightweight Multi-frequency (4 to 250 kHz) 
• Multi-use (industrial and laboratory) 

In addition to the MsS instrument and system software, NDT Ultrasonics supplies probes for:  Pipeline inspection Bridge cables Heat exchangers Plates These probes work on the principle of magnetostriction—easily configured for different sizes, inspection frequencies, and wave modes.

Typical scanning (interpretable) range from the single test location is the maximum ± 90 meters in each direction (180meters bidirectionally) for above ground or encased pipelines. The interpretation distance from the single location can be reduced by the following parameters.  

• Pipeline layout such as several bends, attachments, supports, branches & joints 
• Highly viscous liquid deposits on the internal or external pipewall. 
• Entire pipeline is severely corroded (Rapid attenuation of ultrasound and excessive noise reduces interpretable lengths of pipeline) 
• The type of coating e.g. Bitumin is a viscous liquid which dampens ultrasound. 
• Excessive thickness, diameter and the material of the pipeline 

Ideal Applications:  NDT Ultrasonics equipment can be used for:  

• Rapid inspection of in-service pipelines and piping for detecting corrosion or areas of concern (LCS) 
• Buried pipelines at the excavation locations or at level crossings 
• Encased (through-wall) pipelines or culvert line or PE coated pipes 
• Vertical pipes or structural circular columns 
• Inaccessible piping e.g. overhead piping rack 
• Requirement for high speed assessment to reduce cost reduction - Eliminate the cost of complete scaffolding or use of Elevated working platforms due to which testing speed is reduced. 
• Insulated pipelines and piping – No need to remove entire pipeline insulation 
• Detection of corrosion at pipe supports, clamps and pipe racks 
• Refinery, chemical plants, power station piping 
• Risers and offshore topside pipe work Jetty lines and river crossing pipelines, tank farm link lines and sewer lines 
• Detection of Weld Root Erosion