composite pipe repairs
greyShading

12” Gas Riser, above Splash zone

 
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Overview

A 12” gas riser had a 1 meter (axial length) temporary clamp in place that had been in service longer than its 2 year design life. The Client wished to reinstate the integrity of this section of the riser. An engineered Technowrap composite repair, encapsulating the clamp, was proposed to provide an extension to the design lifetime of this section of riser until a replacement could be fabricated and installed

An onshore trial and test was performed to provide assurance that the Technowrap™ repair would provide the Client with the engineered repair solution they desired

Scope

The scope of work was to provide an engineered composite repair with a 10 year repair lifetime. The design conditions were, pressure of 120 Bar and temperature of 600C. Technowrap™ trained personnel were mobilised to apply the Technowrap Splashzone™ repair materials.

Challenges

As the repair area was in the proximity of the splash zone, i.e. the riser and clamp surface could not be dried, then Technowrap Splashzone™ materials had to be utilized as standard resin systems would not bond to the riser and clamp and cure accordingly.

Walker Technical Resources worked closely with the Client to identify which shift patterns worked best and in conjunction with the Meteorological Forecast of the sea conditions.

A temporary platform was erected to make installation of the Technowrap™ repair as easy as possible. However, to further guarantee the safety of the Technowrap™ personnel all applicators were IRATA trained and worked off the ropes

Solution

Technowrap Splashzone™ was developed to enable Technowrap repairs to be installed on piping systems where the pipework is wet or submerged or for repair applications to caissons and risers in or above the Splash zone.

This application was installed live, therefore there was no loss of production to the client

This application demonstrates Walker Technical Resources ability to work effectively in conjunction with the operational requirements found within offshore environments and in this instance where the surfaces were not moisture free.