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Pipe Retrieval
The Rilsan outer jacket repair kit

TM-55-1930-209-14P-6 Water Purification Barges (NSN 1930-01-234-2165) Chlorination System Manual
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7.0 Rilsan Outer Jacket Repair The Rilsan outer jacket is a continuously extruded thermoplastic sheath (0.2" thick) which provides extra protection to the flexible pipe during bottom tow on the seafloor.  The outer jacket does not participate in the mechanical strength of the flexible pipe, or in its pressure integrity.  In fact, even if the Rilsan outer jacket was completely eliminated, the flexible pipe  would  retain  all  its  properties  because  of  the  pressure  of  High  Density  Polyethylene  Sheath  (0.15"  thick)  right underneath the Rilsan.  Because Rilsan and HDPE are of different colors, it is easy to determine when the Rilsan outer jacket has been damaged through its entire thickness. Minor  damages  to  the  Rilsan  outer  jacket,  such  as  tears,  cuts,  scratches  and  wear,  do  not  require  any  repair  action, provided they do not affect the entire thickness of the Rilsan material. For  a  larger  damage,  a  repair  can  be-conducted  in  order  to  restore  the  continuity  of  the  Rilsan  outer  jacket.    It  is recommended  that  Coflexip  be  contacted  for  such  repair  work;  however,  repairs  can  also  be  performed  by  normally trained technicians.  A repair kit is included







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