composite pipe repairs

Technowrap Splashzone - Calm buoy floating cargo hose



A Calm Buoy Floating Cargo Hose had sustained damage to the outer sheath resulting over a circumferential length of 470mm from the 2 o’clock to 10 o’clock position. The sheath thickness was approximately 8-10mm.

The Client wished to repair the damaged area in-situ and not be inhibited by the location of the hose in the splashzone nor underwater. A Technowrap Splashzone composite repair solution was proposed to provide the client with a repair that could be applied at the specific location and also would cure underwater.

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The scope of work was to provide trained personnel and Technowrap Splashzone materials to affect the required composite repair. No design conditions or parameters were required as the Client wanted a simple non engineered repair to ‘fix’ the damage.


As the repair area was in the splash zone and underwater i.e. the hose could not be dried, then Technowrap Splashzone™ resins and reinforcements had to be utilized as standard epoxy resin systems would not bond to the outer sheath of the hose. Also divers had to be deployed to install the repair.


Technowrap Splashzone™ was developed to enable Technowrap composite repairs to be installed on pipework which is either wet or submerged or for applications to caissons and risers in or above the Splash zone.

For this repair application a temporary platform was erected to allow the Technowrap Supervisor and Technicians access to the divers during installation.

The Technowrap Supervisor briefed beforehand and had continual communication with the diving contractors during the actual installation. The Technicians performed the resin mixing and cloth impregnation from the platform before passing the wetted cloth onto the divers.

This application demonstrates Walker Technical’s ability to work effectively with the operational requirements found within offshore environments and in this instance where the pipe surfaces were submerged.