The UltraWave LRT uses guided wave technology and excites low-frequency ultrasonic waves that travel lengthwise over tens of meters along a pipe, detecting wall thickness variations. The system is ideal to screen in-service pipes and pipelines, and to inspect limited access pipes from a single inspection position. It includes advanced software, acquisition unit, touch screen laptop, and compact probes with bands and bladders.
Offering the capacity to screen in-service pipes and pipeline over long distances, guided wave inspection is used to localize areas of concern on above-ground conventional structures and for advanced applications such as buried, insulated, coated, and vertical pipes. This technology also detects corrosion at supports, clamps, and pipe racks.
Guided wave technology can perform inspections on pipes with limited access. It pinpoints locations that require further inspection, avoiding unnecessary excavation, coating removal, or scaffolding, if no flaw is detected. The use of this technology helps provide a significant reduction in operating costs and is considered an inspection solution for unpiggable pipes.
Guided wave technology is a nondestructive testing method used to locate potential degradation, such as internal or external corrosion and metal loss. While conventional UT provides localized inspection, underneath or in the vicinity of the sensor location, guided waves are able to screen the entire pipe wall, over tens of meters, from a single inspection position. Then, prove-up inspection only needs to be conducted at the specific indication position. Combined with other NDT techniques, a guided wave system will help to maximize the efficiency of a corrosion management program, without compromising data quality.
Conventional UT provides localized inspection, underneath or in the vicinity of the sensor location.
Guided wave inspection allows for the entire pipe wall to be screened over tens of meters from each side of the probe collar location.
The UltraWave LRT system excites low-frequency ultrasonic waves that propagate in the axial direction of the pipe, from both sides of the probe collar. Various factors influence the maximum inspection distance: the pipe configuration and environment, the type of fluid inside the structure, and the type of coating. The propagated torsional waves detect general variations in the total cross-sectional area of pipe, as well as changes in the material properties.
Inspection lengths range up to 91 meters (300 feet) on each side of the probe collar.
The Olympus UltraWave LRT system is a turnkey solution with all the tools and accessories required to perform efficient inspections in the field :
The UltraWave LRT system includes a 16-pulser acquisition unit with a frequency spectrum of 15 to 85 kHz, adjustable in 1 kHz steps for high resolution. Lower resolutions are available in the software to reduce acquisition time and data file size. Portable and battery operated, the unit is supplied with a backpack for easy on-site transportation. The system offers optimized power management with two hot-swappable batteries to maximize on-site efficiency.
The probe modules are sealed in a molded housing for increased durability in rough environments. Their lightweight and low-profile design ensures consistent contact and stability on the pipe surface during data acquisition.
The Olympus UltraWave LRT system has several design features that make setup straightforward and secure. All the necessary information for probe module installation is clearly displayed on the collar.
Defining the scope of work for an inspection job is a critical part of the planning process for a guided wave examination. The UltraWave LRT user-friendly software provides a step-by-step wizard for entering the inspection parameters.
The user-friendly software facilitates the management of all relevant inspection information.
Guided wave technology is a frequency-dependent detection method. The UltraWave LRT software is equipped with a unique F-scan color map that displays the entire frequency range acquired over the inspected pipe length. With this color map, selecting the optimum frequency for further analysis is fast and intuitive. A shadowed zone on the F-scan represents the low area of the power curve.
The F-scan color map displays the entire frequency range at a glance.
Once a frequency is selected, the corresponding A-scan is displayed and used for detailed analysis. The A-scan analysis features distance-amplitude correction (DAC) curves, reflector annotations, and an option for additional notes. Two independent sets of DAC curves can be adjusted for the forward and the reverse direction.
When an indication is tagged on the analysis graph, the software updates the pipe schematic with a pre-selected symbol. Then this information, including the user’s notes, is compiled in an indication table, which is saved for the report.
An annotation list linked to a defect table allows for a quick A-Scan analysis.
The active focusing capability enhances the flaw evaluation performance by delivering concentrated energy to a specific portion of the pipe, resulting in a better signal-to-noise ratio. Once a specific distance on the pipe has been selected, the energy is then focused at eight different positions around the circumference, investigating the pipe cross-section, segment by segment. The active focusing also estimates the circumferential extent of the indication.
The active focusing mode delivers concentrated energy at the desired distance, and the corresponding axial profile evaluates the indication extent.
Synthetic focusing is a post-processing tool (offline) for advanced data analysis. A virtual image of the unrolled pipe (C-scan) is generated, based on the phase velocity of the received mode. It is performed at one selected frequency.
Synthetic focusing mode provides an unrolled pipe view (C-scan).
A report automatically compiles all of the necessary inspection data into a single document. Specific data can be selected and added to the user-friendly Report Tree menu, including F-scan, Active Focusing and Synthetic Focusing views. The report is customizable with all the details related to the inspection location.
An integrated camera on the laptop allows the user to quickly import a picture of the inspected site into the report.
Acquisition Unit Specifications > Weight
7.1 kg (16 lb)
Acquisition Unit Specifications > Dimensions (W × H × D)
250 mm × 150 mm × 400 mm (9.8 in. × 6 in. × 15.7 in.)
Acquisition Unit Specifications > Environment Specifications
Storage temperature: –20 ˚C to 60 ˚C (–4 ˚F to 140 ˚F)
Acquisition Unit Specifications > Power
Two lithium-ion batteries and AC adaptor
Acquisition Unit Specifications > Instrument Autonomy
1 day of typical 8-hour shift operation
Acquisition Unit Specifications > Standards
CE, RoHS, WEEE
Acquisition Unit Specifications > Casing
Batteries > Battery Model
Batteries > Battery Type
Smart lithium-ion batteries
Pulser specifications > Number of Channels
Pulser specifications > Pulse Type
Pulser specifications > Pulse Voltage
Pulser specifications > Mode
Pulser specifications > Frequency Range
15 kHz to 85 kHz
Pulser specifications > Number of Cycles