32” produced water line in gulf region – Major national oil company

Challenges

• 550 meter repair

• Pipeline lifting

• Welded saddle supports

Benefits

• Cost-effective alternative

• Quick installation

• No shutdown

Scope

A 32” produced water line had significant internal erosion/corrosion at the 6’oclock position with a minimum remaining wall thickness of 4mm. The length of pipeline requiring repair was approximately 550 meters which contained various saddle supports, some of which were welded. The client required a qualification test of the proposed repair solution, on site, prior to installation of the actual repair.

Solution

The scope of work was to provide an engineered design, with 20 year repair lifetime, trained personnel and Technowrap 2K™ with Technowrap HP PRS™ materials to affect repair. Design pressure of the line was 47Barg, with design temperature of 82DegC.

Result

The installation procedure of the composite repair as demonstrated on the test spool, was approved by the client and produced for site installation. To complement the repair application procedure, a detailed lifting plan of the pipeline over the supports was created to ensure complete encapsulation of the pipeline. Additional requirements of applying the repair on all areas of the pipework included where the pipe work rested on the pipe supports.

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