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Pipeline Scanning | Ultrasonic
Weld Testing | TOFD | Engineering
Critical Assessment | AUT
Weld Equipment
AUT Weld Equipment
Pipeline inspection – equipment summary – AUT/NDT weld testing
In addition to incorporating the most advanced AUT Technology in the NDT weld testing field, UT Scan is designed to meet the industry's most practical necessities. The most recent components of the UT Scan AUT system were selected from the best specifications available to endure the harsh conditions encountered on pipeline inspection projects. The rugged construction of UT Scan's electronics casing ensure reliability and durability in the field.
All UT Scan AUT units consist of:
- 32 channel ultrasonic equipment
- Data acquisition computer with presentation, recording and storage capabilities
- A scanner using a guiding band which is positioned on an even surface
- Ultrasonic probes and a probe holder frame
All UT Scan units can have the same setup and can be used on either the mainline, repairs, or on onshore and offshore tie-in welds.
New Technology – UT Scan
- Innovative, rugged & portable design
- Latest electronics
- Multi probe AUT (phased array ready)
- Auto calibration checks
- Auto weld interpretation
- GPS technology
- Cross sectional & hi/lo presentation
UT Scan Equipment Summary
UT Scan's electronics are mounted on the scanning head to guarantee the highest quality possible. This also reduces the circumferential size of the umbilical and allows longer lengths with a loss in quality. A 50 meter umbilical will reach all welds and repairs with ease. The total cycle time to move from one weld to the next one on the mainline is normally less than 3 minutes.
One scanning head inspects all wall thicknesses with the same weld preparation using the unique smart marking system on the probe frame. The smart marking system allows for the examination of welds with different wall thicknesses for SMAW (Shielding Metal Arc Welding) and GMAW (Gas Metal Arc Welding) (pitch/catch techniques are in separate holders). Transferring from one wall thickness setup to another is completed in less than 5 minutes.
The Probe Wedges
Special care was taken in selecting the probe wedge material for UT Scan's pipeline inspection capabilities. The material chosen will not deform below 160•C and is UT "friendly," which benefits the overall signal-to-noise ratio. It has good mechanical properties and can be used in cold and hot weather.
The Wedge Holders
UT Scan's wedge holders are designed from hardened tool steel in order to minimize wear. Shim plates are used to create different vertical wedge positions to reuse the wedges up to 5 times. The wedge holders further incorporate the coupling supply and gimbals in both directions to ensure optimum contact with the pipe surface.
The Probe Frame
UT Scan's probe frame is built from individual shackles which can be mounted together to construct the required frame size for the job. This unique design allows you to use the same frame for pipe sizes between 4" - 12" and 14" - 56."
The Encoder
UT Scan's encoder is mounted in the probe frame and runs on the pipe surface. Its waterproof design has an accuracy of 0.15% or better. The encoder triggers the system to record data every 2.0 mm of scanning.
- UT instrument 32 transducer channels
- 64 programmable measurement sequences
- Linear amplifier with 105 dB dynamic range
- Pulse echo, Pitch catch, Through transmission, TOFD
- Per channel adjustable spike pulse width
- Mounted on the scanner for improved signal quality
Highlights
- Wedges are protected for wear and can be reused up to 5 times
- The one-probe frame can be readjusted to inspect multiple and different pipe sizes
- A smart marking system allows for the examination of welds with different wall thicknesses for SMAW and GMAW (pitch/catch techniques are in separate holders)
- Automated calibration blocks are designed to transfer to CNC machining and system setup files
Working Range of the UT Scan System
The UT Scan system can inspect pipeline welds with a diameter range of 4” up to 56." The wall thickness range is 6.0 mm up to 40.0 mm
One (1) AUT unit with one (1) 4WD crew cab truck and one (1) helper can inspect
- Up to 75 mainline welds per day or
- Up to 30 tie-in welds per day or
- Up to 40 mainline welds and up to 15 tie-in welds per day
One (1) AUT unit with two (2) 4WD crew cab trucks and two (2) helpers can inspect
- Up to 150 mainline welds per day
- Up to 80 mainline welds and up to 15 tie-in welds per day