An overview on
HIPPS (High Integrity Pressure Protection System) is an independent SIS (Safety Instrumented System) designed to protect downstream lines and plant portions from overpressure events. It is normally used to partially or completely replace the flare and relief system as a result of increased environmental awareness.
HIPPS is the ultimate and independent safety layer of a plant, for the prevention of dramatic events. The HIPPS system consists of at least three elements: initiators, logic solvers and final elements. The main standards applicable to HIPPS are IEC 61508 and IEC 61511.
Implementing HIPPS in a plant is a commitment to protecting the environment, your assets and your people.
Protect the environment
Traditional flare and relief systems are responsible for environmental pollution. HIPPS increases safety, therefore sustainability of Oil & Gas sites.
HIPPS is a significant Capex and Opex saving. Main drivers are: weight and cost reduction for piping and vessels downstream and optimization of available space.
HIPPS allows full utilization of plant potential, bringing technical performance to the edge, especially using electronic HIPPS.
Where to use HIPPS
Hipps can be installed in any part of the plant where a pipe spec break or protection is needed. For instance:
LNG compression facilities
Gas Injection Compressor Facilities
Oil Pipelines pumping stations
Gas Pipelines compression stations
Pressure letdown stations
Gas gathering and storage
When to use HIPPS
HIPPS provides an advanced solution to protect equipment when:
extremely high pressure and flow rates are involved
overall plant risk profile needs to be reduced
environmental and safety awareness are paramount
economic viability needs improvement
HIPPS System Architecture is based on customer requirements in terms of performance and SIL (Safety Integrity Level), which are part of SRS (Safety Requirement Specifications). IEC 61508 and IEC 61511 international standards are intended to address the application in the process industries covering all aspects of design (risk assessment, conceptual design, detailed design, operation, maintenance and testing).
The sensing elements are used to measure the line pressure. Several voting architectures can be applied. The most used voting logics are 2oo3 or 2oo4. On some occasions an interlocking manifold can be used to avoid spurious trips due to misoperation.
LOGIC SOLVER CABINET
It is typically an electronic hardware that continuously compares the process value coming from the initiators and performs logic and diagnostics to operate the final elements when a demand occurs. The logic solver can be programmable or solid state depending on the maximum SIL target.
Actuated ON-OFF valves that isolate a portion of the plant/ pipeline from over pressure propagation. ATV HIPPS is able to provide the most suitable valve selection based on customer specifications and plant safety requirements.
ATV HIPPS will select the most suitable valve to fulfill HIPPS service. ATV has a wide variety of final element solutions (Ball, Gate, Axial). ATV HIPPS is a vendor independent integrator that can choose any brand specified by customers.
Side and Top Entry, Metal and Soft seated, API 6D Class 150 through 2500, API 6A Class up to 15 K, sizes from 2″ to 48″.
Through Conduit Slab and Double Expanding, API 6D Class 150 through 2500, API 6A Class up to 15 K, sizes from 1″ to 48″.
Axial Flow Valves, ASME Class 150 through 2500, API Class 3K to 10K, sizes 2″ to 48″.