GLOUCESTERSHIRE, UK -- Arc Energy Resources has completed the corrosion-proof cladding of an 8.65-m (28-ft) long, 16-in. (41-cm) diameter Superduplex riser for Mardale.
The pipe is destined for a sour oil reservoir in the Gulf of Suez. Oil and gas from the field will initially be produced from a single, unmanned nine-slot platform with a 16-in. (41-cm) multiphase pipeline connecting to onshore facilities.
The project required Arc Energy to fully clad the riser externally using 16 plates of 3-mm 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 was witnessed by independent inspectors, the company reports.
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, the company says.