The High Integrity Pressure Protection Systems designed by SELLA CONTROLS provide increased safety for pipelines and other critical plant where normal operation at higher pressures would not be permitted with ordinary SIS systems.
SELLA CONTROLS, with our partners, provide a complete turnkey solution for HIPPS, which is IEC 61508 SIL rated and encompasses the following elements:
High integrity manifolds
Logic solvers – programmable or hardwired
Axial flow and fully piggable ball or gate valves, complete with actuators incorporating partial stroke testing if required
Typically, certified pressure transmitters are used in the classic 2oo3 configuration for improved Probability of Failure on Demand (PFD) on an interlock manifold or individual block and bleed key interlocked assemblies.
Certified logic solvers are either in a single or dual configuration for increased availability. Equipment can be mounted in all classified areas deploying ExnR, Exe and Exp, Exd methods for Zone 1 or 2.
Valves can be supplied either as single or dual units for increased safety. The whole system can be TÜV certified for each individual installation, to meet national and international regulatory requirements.