Parker Instrumentation has been selected by EnCana (UK) Limited to supply exotic-material tube fittings for its recently approved Buzzard Project in the central North Sea. The use of this advanced material will help to optimise life expectancy for the instrumentation systems on the three-platform complex that will make up the Buzzard facility. “C276-based fittings will help to deliver a trouble-free life for the instrumentation systems on this massive field,â? says Keith Wood, Parker Instrumentation’s UK Project Manager. At the same time, this will support the project’s environmental goals and minimise maintenance as well as cope with the reservoir’s “sour gas” containing hydrogen sulphide and carbon dioxide. The tube fittings are twin-ferrule compression types from Parker’s A-LOK family. For all critical equipment areas, the fittings will be fabricated from C276, a steel alloy with nickel, molybdenum and chromium, which is generally considered to be one of the most versatile corrosion-resistant alloys available for dealing with aggressive oil, gas and chemical media. The corrosion resistance offered by the C276-based fittings is then maximised by the SuparCase process which Parker International has developed to harden the back ferrule, the part of the fitting responsible for ensuring a strong grip on the tube, without adversely impacting susceptibility to corrosion. This process additionally extends the lifetime of the fitting, allowing joints to be re-made for maintenance purposes, helping to minimise total lifecycle costs.
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