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The installation of a protective sleeve into pre-existent equipment is an accepted process to protect
tubing from active corrosion and/or erosion mechanisms.  Thin walled metal inserts can be
hydraulically expanded into existing tubes to add additional years of service to a process exchanger.
Inlet erosion is a common problem found in process exchangers due to entrained abrasive solids or
turbulent flow conditions (non-laminar conditions).  Header box and channel designs can also add to
the turbulence that is primary cause of erosion/corrosion to the tube ends.  Metallic inserts can shield
and protect the tube ends from wear caused by these factors.  Selection of proper sleeve material,
wall thickness and length is required to provide complete coverage of corrosion zone.
the need to re-tube exchangers that have localized corrosion or damage.  The
cost savings are significant as the exchanger does not have to be disassembled
or shipped to complete the sleeving operation. Sleeves can be removed at a
later date and new sleeves installed.
Tube sleeving
by metallic sleeving inserts is a cost effective and quick repair method that will
return your equipment to reliable service.  Sleeve can be scheduled during routine
maintenance schedules to avoid last minute retubes or impacting plant operation.
Sleeving reduces
To extend the
service life,
some sleeve materials can be easily inspected under to allow for continued inspection
and document corrosion rates.  Sleeving can add additional benefits such as, add
structural integrity to rolls and tubesheet joints, reduce “Cold” zones where
increased corrosion can occur and tighten loose packed tube joints.