Long Range Ultrasonic Testing (LRUT) is a non-destructive testing method that uses ultrasound to inspect cylindrical pipes from a distance. LRUT gives quick wall thickness measurements over long lengths of pipe, unlike conventional ultrasound testing which takes spot measurements. The key components of an LRUT system are transducers, a pulse-echo unit, and computer for processing data. LRUT is useful for inspecting non-piggable pipes and is more economical than removing pipes from service for internal inspection. Future developments aim to expand LRUT's applications and overcome limitations like its current restricted use under water.

1. Long Range Ultrasonic Testing (LRUT)
Presented by
Engr Kevin Ukueku

2. Content
 Background and history of LRUT  Working principle of LRUT
 Components of LRUT equipment  Future trends
 What is LRUT?  Conclusion
 Why LRUT?  Introducing DPS

3. Background and History of LRUT
 Ultrasound has been used in several
fields before world war II
 LRUT research was first conducted by
TWI and Imperial College, UK
 Plant Integrity Ltd (the commercial arm
of TWI) introduced LRUT in early 1998
with major changes made in 2004

4. What is LRUT
 A method of inspecting cylindrical pipes using
ultrasonic technology (sound wave propagation)
 Gives a quick screen wall measurement over a
certain length against spot measurement in
conventional UT
 Distance of propagation of sound waves in pipes
depend on the viscosity of fluid flowing in the pipe

5. Why LRUT?
 May be the most economical means of
inspecting non piggable pipelines eg pipes
with obstruction, dents and gorges;
 Suitable for small diameter pipes
 Pipelines without pig traps or which cannot
be retrofitted with temporary pig traps

6. Working Principle
 Uses a pulse-echo technique

7. Components of LRUT
equipment
Five major components
 Teletest Focus Unit
 Collars

8. Primary Components of LRUT
equipment
 Module with
Transducers
 Computer

9. Future Trend
Future developments are aimed
at;
1. Expanding the use of the
technology for other in-
service asset including
• Railway lines and Tanks

10. Future Trend
2. Overcome current
hindrances which
include;
 Its use under water
 Fixing of equipment
permanently on pipe
for continuous
monitoring

11. Conclusion
The relevance of LRUT to the
maintenance of the integrity of in-service
pipelines is enormous. In the near future,
its application to other industrial assets is
definitely a step in the right direction.

12. Who we are…Deepwater
Pipeline Services (DPS)
 DPS is an innovative pipeline integrity company
 100% Nigerian owned
 Started off by a group of young Nigerian
proffessionals with international oil and gas work
experience
 Clients include SPDC, Chevron, Snepco,
OandO, etc
 Please visit www.deepwaterpipeline.co.uk for
more details

13. Thank you