What is LRUT?
A long‑range ultrasonic method for in-service pipeline screening over extended distances.
Method of Inspection | Applications
Long Range Ultrasonic Testing (LRUT) is an advanced non-destructive testing technique. LRUT uses low frequency ultrasonic modules and works by creating an ultrasonic wave form that travels both longitudinally and circumferentially, allowing long lengths of piping to be scanned. The technique is used to detect and analyse ultrasonic signals received as a result of metal loss such as corrosion and erosion.
LRUT, also known as Guided Wave Ultrasonic Testing (GWUT), gives pipeline operators a comprehensive look at their pipeline’s condition. Screening for localised thickness loss, ALS’s experts are able to detect for corrosion, erosion and mechanical damage by scanning from a single inspection location with signals transmitted in both directions along the pipe or piping.
LRUT applications include:
- Pipework, including examining for Corrosion Under Insulation (CUI) covering many metres from one scan location.
- Long steel cylindrical elements such as steel piles and structural cylindrical columns.
- Corrosion Under Pipe supports (CUPS).
- Buried piping, such as piping running under roads.
- Piping going through bund walls and other concrete structures.
LRUT is primarily applied on in-service pipelines.
ADVANTAGES OF LRUT
LRUT is an excellent screening tool in long components, such as pipework, for evidence of localised thickness loss, including external and internal corrosion pits. Additional advantages include:
- The ability to measure significant pipe lengths from a single point.
- There is no need for scaffolding installation, coating removal or excavation.
- The ability to inspect pipes at temperatures up to 100°C.
- The inspection can be conducted whilst the asset is in service, removing possible production losses and downtime.
- Rapid inspection time and rapid results
Materials Suitable
Carbon steel pipelines
Inspection Capabilities
- Pipeline screening
- Corrosion hotspot identification
Process Overview
- Transducer placement
- Ultrasonic signal transmission
- Data interpretation
Industries We Serve
Oil & Gas, Mining, Power Generation
Key Benefits
- Reduced excavation
- Efficient integrity screening
- Cost savings
Reporting & Deliverables
- Distance‑based defect reports which our clients have access to from our online reporting system
- Risk ranking
An online reporting system is available to our customers, allowing 24/7 access to reports.
Why Choose Us?
- Skilled LRUT teams
- Reduced inspection impact
- Reliable results