Pig Launchers/ Receivers
Jamison Products Pig
Launcher/ Receivers offered are a custom engineered design products that meets
customer, environmental and industry standards. The Pig Launcher/ Receiver is
built for ease of operation and longevity of service. With a multiple of option
available, Jamison will supply the ultimate design that readily meets your
technical and commercial requirements.
What is a Pig
Launcher/Receiver?
Pigging in the
maintenance of pipelines refers to the practice of using pipeline inspection
gauges or 'pigs' to perform various operations on a pipeline without stopping
the flow of the product in the pipeline. Pigs get their name from the squealing
sound they make while traveling through a pipeline. These operations include
but are not limited to cleaning and inspection of the pipeline. This is
accomplished by inserting the pig into a Pig Launcher - a funnel shaped Y
section in the pipeline. The launcher is then closed and the pressure of the
product in the pipeline is used to push it along down the pipe until it reaches
the receiving trap - the 'pig catcher'.
If the pipeline
contains butterfly valves, the pipeline cannot be pigged. Ball valves cause no
problems because the inside diameter of the ball can be specified to the same
as that of the pipe.
Pigging has been
used for many years to clean larger diameter pipelines in the oil industry.
Today, however, the use of smaller diameter pigging systems is now increasing
in many continuous and batch process plants as plant operators search for
increased efficiencies.
Pigging can be used
for almost any section of the transfer process between, for example, blending,
storage or filling systems. Pigging systems are already installed in industries
handling products as diverse as lubricating oils, paints, chemicals,
toiletries, and foodstuffs.
Pigs are used in
lube oil or painting blending: they are used to clean the pipes to avoid
cross-contamination, and to empty the pipes into the product tanks (or
sometimes to send a component back to its tank). Usually pigging is done at the
beginning and at the end of each batch, but sometimes it is done in the midst
of a batch, e.g. when producing a premix that will be used as an intermediate
component.
Pigs are also used
in oil and gas pipelines: they are used to clean the pipes but also there are
"smart pigs" used to measure things like pipe thickness along the
pipeline. They usually do not interrupt production, though some product can be
lost when the pig is extracted. They can also be used to separate different
products in a multi-product pipeline.
Why use a Pig
Launcher/ Receiver?
A major advantage of
piggable systems is the potential resulting product savings. At the end of each
product transfer, it is possible to clear out the entire line contents with the
pig, either forwards towards the receipt point, or backwards to the source
tank. There is no requirement for extensive line flushing.
Without the need for
line flushing, pigging offers the additional advantage of a much more rapid and
reliable product changeover. Product sampling at the receipt point becomes
faster because the interface between products is very clear, and the old method
of checking at intervals, until the product is on-specification, is
considerably shortened.
2/6/2015
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