Specialist Pigging Applications
Aiman (3210600035)
AIM OF THIS PRESENTATION:
?
To provide general idea of
different types of specialist
Pigging application
The reason why it is under
development and its
applications
INTRODUCTION
The field of pigging has expanded towards a more
sophisticated devices and specialist applications.
Pigging systems need to evolve to satisfy other
demands.
For Example: the requirement to survey pipelines
to detect not only dents and buckles, but also
corrosion pitting and cracks has lead to the
development of intelligent pigs.
SPECIALIST APPLICATION
INTELLIGENCE PIGGING
INTERNAL COATING
Magnetic Flux Pig
Epoxy Lining Pig
PRESSURE BARRIERS
Remotely Controlled
Subsea Barrier Pig
Ultrasonic Pig
Video Camera Pig
Neutron Scatter Pig
Pressure Resisting
Plug
MAGNETIC FLUX PIG
Detect the wall thickness over the
entire pipe surface as well as picking
up dents, buckles and pipe ovality
The principle of magnetic-flux leakage
detection is used to determine the
volume of metal loss, and hence the
size of defect
The pigs can function in both gas and
liquid lines.
ULTRASONIC PIG
Ultrasonic Pig uses internal fluid as
a couplant to measure the wall
thickness of the entire pipeline
surface
It is a direct measurement of wall
thickness, the interpretation is
more straightforward than for a
magnetic- flux pig.
Ultrasonic Pig are better suited to
liquid lines and cannot be used in
gas lines without a liquid couplant
VIDEO CAMERA PIG
Video camera mounted on a tethered
pig which has been used for the internal
inspection of pipelines close to the ends.
NEURON SCATTER PIG
To detect spanning and burial in subsea
pipelines. In places along a subsea
pipeline the seabed can scour away
leaving a vulnerable span
Neutron-scatter pig offers the possibility
of reducing the amount of external
survey required and detecting with
greater accuracy the span characteristics
EPOXY LINING PIG
It is used to coat the internal
surface of a pipeline with a
smooth epoxy liner to give
improved flow and added
corrosion protection.
first internal surface, must be
clean and then a number of
slugs of epoxy paint is pushed
inside the pipeline.
Provide a less time
consumption compared to
traditional ways of coating
internal pipe. (E.g. Spray gun)
PIGGABLE BARRIER VALVE
A piggable barrier valve is considered
as a cheaper alternative for subsea
safety valve for offshore platform.
The pig is remotely set in place into
position for example 500m from the
platform.
It would act as a non-return valve to
prevent back flow of gas in the event
of an upstream depressurization.
Its main disadvantage would be the
prevention of routine pigging.
SUMMARY
Improvements in pigging systems are
still needed to replace procedures that
are seen as less than ideal.
In this day and age, there is still plenty
of room to develop pigging technology
that can compete with traditional
methods.
THANK YOU!