HIPS (High Integrity Protection System), is also sometimes referred to as High Integrity Pressure-Protection System (HIPPS).
HIPPS is a collection of independent protection layers to mitigate an overpressure scenario. It is a combination of mechanical protection like Relief devices together with an automated system like Shutoff valves with associated instruments.
HIPPS are considered if relief device vents are not acceptable due to safety or environmental concerns.
If the maintainability of the vent is excessively expensive
If the conventional systems are not adequate
If the relief system may create a greater hazard.
HIPPS (High Integrity Pressure-Protection System) is a protection method to control risk in case of excessive pressure by considering Safety Instrumented Systems (SIS) and other Independent Protection Layers.
Install a mechanical, self-actuated, relief device for an overpressure scenario shall be the preferred choice as these devices respond to overpressure, regardless of the cause. As an additional protection use instrumented protection layers (there are limitations of common cause failures).
Conventional relief devices have been proven available to perform a specified protective function on demand for over a hundred years. These self-actuating mechanical systems are usually independent of other Independent Protection Layers.
The technology (other than sizing) is simple as compared to most instrumented systems and usually easy (though not always inexpensive) to maintain.
Steps:
HIPPS shall be noted on the P&ID and Safety Instrumented System Loop Documentation Form. A registration form shall be completed for each HIPPS.
HIPPS systems are registered in the pressure relief registry.
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