Hima-Sella has commenced work on three contracts to provide solutions to protect against overpressure scenarios at the Total E&P UK gas terminal at St. Fergus, Scotland.

Under a contract awarded by Wood Group PSN, Hima-Sella is upgrading an existing Over Pressure Protection System (OPPS). The company is also contracted by valve manufacturer Mokveld to provide and install a new High Integrity Pressure Protection System (HIPPS) and a new Interlock Over Pressure Protection System (IOPPS).

Each system is being implemented using a HIMA Planar 4 solid state logic solver connected to pressure transmitters fitted to the interlocking manifolds of the pipelines they protect. In the event of an overpressure scenario, the Planar 4 (which is SIL 4 capable) will send shutdown signals to the respective safety valves.

Hima-Sella is also providing a HIMA HIMatrix system (itself SIL 3 rated) as a controller for ‘Sequence of Events’ reporting and pressure transmitter discrepancy calculations.

All essential system components have been delivered and are scheduled for installation. Commissioning is scheduled for later this month.