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Product category: Oil, Gas, Petrochemical Industry News
News Release from: Arc Energy Resources | Subject: Cladding for Superduplex riser
Edited by the Processingtalk Editorial Team on 06 June 2007

Anti-corrosive cladding for pipeline
component

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Arc Energy Resources has corrosion-proof clad an 8.65 metre-long, 16inch diameter Superduplex riser for use on a sour oil reservoir, fully weld and pressure tested ahead of schedule

Gloucestershire-based Arc Energy Resources carried out the corrosion-proof cladding of the Superduplex riser for Mardale, a leading supplier of pipeline packages for the oil and gas industries The pipe is destined for a sour oil reservoir located approximately 10km offshore in the Gulf of Suez

Oil and gas from the field will initially be produced from a single, unmanned nine-slot platform with a 16inch multiphase pipeline, of which the riser is a vital component, connecting with onshore facilities.

Because media temperatures of 120C in the splash zone create a very corrosive environment, the project required Arc Energy to fully clad the riser externally using 16 plates of 3mm Alloy 59.

The new procedures had to be qualified in accordance with ASME IX and other international standards.

The test welds and subsequent mechanical testing were witnessed by independent inspectors.

Commenting for Mardale, a spokesman says Arc Energy supplied full procedural documentation for the work, which was approved by the client before fabrication began.

Following completion of the seal welding, the cladding was subjected to 100% DPI followed by a pressure test using an inert gas at a pressure of 1 bar.

The pressure test was held for 15 minutes minimum and the sealing weld visually examined to ensure that no leaks were evident.

During manufacture and testing the material was inspected by the client's inspector and an independent inspector, and was fully accepted.

He adds that despite the qualifying and inspection regimes the work was completed ahead of schedule.

Arc Energy sales director Alan Brown says the project required an exceptionally high standard of welding as the riser is a vital component in the pipeline system, which terminates at a new onshore reception area, where gas and liquids are separated.

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