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INHIBITED OIL & WATER SOLUBLE SCRAPER PIGS SELECT INHIBITED SOLUBLE
PIGS™ are solid sphere shaped balls or cylinder shaped plugs. OIL-SOLUBLE type pigs (for oil systems) contain
micro-crystalline wax, paraffin inhibitor and pour point depressant. WATER-SOLUBLE type pigs (for water systems)
contain a water-soluble surfactant and corrosion inhibitor. PRODUCT USES & ADVANTAGES SELECT INHIBITED SOLUBLE
PIGS™ are used to clean out paraffin deposits and other unwanted accumulations
inside of pipes. SELECT INHIBITED SOLUBLE
PIGS™ (oil-soluble type) contain paraffin inhibitor and pour point
depressant. The residual traces of
inhibitor help prevent re-deposition of paraffin for a short period of time. The pour point depressant helps the oil that
contacts the pig flow easier at lower temperatures. SELECT INHIBITED SOLUBLE
PIGS™ can be used in any length lines.
The ball type pigs can go around 90º turns that may stick rubber or
plastic pigs and are very inexpensive as compared to rubber or plastic pigs or
hot-oil treatments. Pigs do not
interfere with other production and pipeline chemicals. PRODUCT SPECIFICATIONS The dissolving rate of pigs
is a function of fluid temperature, relative fluid movement, friction, and
absorb ability of the crude. These conditions
vary greatly with each system. The
melting point for our standard pig is about 145ºF. Special-order melt point pigs range from 125º
to 180º. All pigs will dissolve in
fluids with temperatures below their melting point (just at a slower
rate). Some fluid movement past the pig
is necessary to dissolve the pigs if the fluid temperature is below the pig’s
melting point. TREATMENT DETERMINATION & PROCEDURE The number of pigs to be used
is based on the amount of accumulation, length of pipe, temperature of fluid
and other factors. Field experience
indicate and that in short lines (500 feet or less) usually require 1 to 5 pigs
and longer lines (500 feet or more) usually require 5 to 10 or more pigs. Regular periodic pigging is recommended to
keep lines clean and prevent paraffin from becoming too hard or thick to
remove. THE MOST COMMON PROCEDURE is to insert pigs (one at a time) through a pig
launcher then pump through system and continue running pigs (one at a time)
into the line until:
SELECT INHIBITED SOLUBLE
PIG™
If desired, the amount of
fluid pushing the pig can be measured to determine the pig location. Do not use more than one pig at a time. ALWAYS record the volume of the fluid
behind the pig as “insurance” so that the pig location can be calculated should
it become stuck. Applying heat to the
pipe can melt the pig. ALWAYS
have the capability to pump from the opposite end of the lines to free an
obstruction. THE MOST COMMON SIZE PIGS
ARE LISTED BELOW. Call for
quotations, if a special BALL is desired. PLUGS can be made to any
specification desired. WHEN ORDERING PIGS SPECIFY: (1) Quantity (2) Pipe Inside Diameter and
schedule (3) Oil-soluble or water-soluble (4) Balls or Plugs EXAMLPLE: 6 cases,
2” schedule 40 (ID 2.067”), oil-soluble balls.
IMPORTANT: Pigs should be grooved on edges if there is a possibility that the pig could become stuck. This would allow
some fluid movement past the pig on
the edges. Pigs can also be drilled in
the center from each end; but leave an area in the center that is not
drilled. This allows circulate to be
established by raising pressure and breaking un-drilled portion of pig (center
of the pig).
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