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Subsea Wellhead Ball–Valves

Shutoff off Subsea Wellheads With Integrators for Medium Pressure Ball–Valves

| Author / Editor: BILL MENZ / Dominik Stephan

...Further, as part of their normal testing process, AGI tests all skids before shipping by cycling valves and pressurising the system to its full-rated pressure. In this case, the skids showed no leaks anywhere, including at end connections or across the seat of the ball valves. In past tests for other skids, AGI has spent as much as four hours correcting leaks. For example, in one case, the skid contained more than 100 valves, and the seats on each one had to be replaced.

The initial pressurisation of the system had compacted the seats, and therefore the valves could not reseal as pressure in the system was being built back up. The FKB series ball valve and mediumpressure

end connections saved AGI considerable time and costs during the initial fabrication and at final testing.

Dependable and Easy to Use: Integrators for Ball–Valves

When a component is dependable and easy to use, there is a quantifiable savings in avoided guesswork, setbacks, reconfigurations, failed tests and delays resulting from special tools that are not readily available or parts that need to be reordered and refitted.

On Service in the Gulf of Mexico

Additional savings are realised by the end user in reduced maintenance costs and ease of service throughout the life of the skid. Total cost of ownership over time – as opposed to the initial purchase price of a component – is the appropriate frame of reference when comparing costs. The two new skids that AGI successfully fabricated with medium-pressure ball valves and end connections for use with SAF 2507 tubing are in service on platforms in the Gulf of Mexico.

* Bill Menz is the Business Unit Manager, Swagelok Company.

* Tony Taylor is the Design and Special Projects Manager, AGI

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