Long Range Ultrasonic Testing  

Flaw Detector

Plant Integrity Ltd has announced the launch of the Teletest Focus+ Guided Wave Pulser-receiver unit. This system will replace the successful Teletest Focus unit which was introduced to the market four years ago.

The development of the Teletest Focus+ unit has taken 2 years of collaboration between Plant Integrity, key industrial partners and TWI's Long Range Ultrasonics Group in order to provide a pulser-receiver unit that not only improves Guided Wave inspection for site technicians but also provides the optimum platform for Guided Wave Research and development for TWI and other University Institutes.

The key improvements to the pulser-receiver unit are Ethernet communications and 24 fully independent transmit and receive channels to speed up data collection. Better range and sensitivity has been achieved due to maintaining the Teletest standard output voltage of 300V Peak to Peak with improved sampling resolution and filtering.

Weight has not been compromised for this added functionality with a 45% reduction to 7.6kg over the previous unit.

Key features introduced in the previous pulser-receiver unit such as the internal electric pump for inflation of collars and GPS have proved so popular that they have been kept within the new unit also. Inspection of pipelines is still operated in octants to fully utilise the A-Map (unrolled pipe) and secondary focussing technique unique to Teletest.

The Teletest Focus+ system is fully back compatible with tooling and Teletest WaveScan software. Teletest operates in Multimode configuration as standard uniquely providing both longitudinal and torsional wavemode inspection simultaneously. In addition, a new five ring Torsional module has been launched that provides a high amplitude, broad frequency range torsional inspection when that additional power is required, without the need to change transducer spacing.

Inflatable Collars

The one-piece collar, made out of state of the art carbon fibre reinforced Kevlar, are thinner and 60% of the weight of the current standard. The new design has reduced the necessary clearance between pipes to 65mm. This is often an important consideration, where many pipes run in close proximity. The collar is clamped around the pipe with a rapid latch mechanism and can be mounted in under a minute

Multi-Mode Modules

The multi-mode modules accommodate five transducer elements, three to excite the longitudinal mode and two to generate torsional waves. Each mode has its pros and cons for flaw detection in a given situation. Multi-mode capability ensures that the wave mode is optimised for the specific pipe being inspected.

Mini Tools

Plant Integrity has developed 'LATCH and FIRE' mini-tools to inspect 1.5 -5" diameter pipes. These represent a step change in efficiency compared with cumbersome 'fixed ring' tools. They have brought about a 90% improvement in set up time and only require 42mm clearance between pipes.