High Integrity Pressure Protection System

Transcription

1 High Integrity Pressure Protection System Introduction As oil and gas resources become harder to find, producers are forced to operate in environments of ever increasing severity and risk. Often operating in High Temperature High Pressure (HTHP) applications, the consequences of a catastrophic failure to personnel, the environment and infrastructure are immense. To help manage the increasing and unprecedented risk, the concepts of Safety Instrumented Systems (SIS) and Safety Integrity Levels (SIL) were created and applied. One such SIS type, is the High Integrity Pressure Protection System (HIPPS). A HIPPS is an independently instrumented protective device, and acts as the last line of defence for protecting downstream operations from over pressurization. Typically certified to SIL 3, a HIPPS gives operators the most dependable pressure protection device available in the market today

2 Protecting Your Assets Traditionally, the risk of over-pressure events has been managed through the use of mechanical relief systems which open to relieve excess fluid to disposal systems such as flare or holding tanks. Although simple, relatively low cost and widely available, mechanical relief systems often require a large installation footprint, and are far from ideal when the process fluid is flammable or toxic. Typically operators select a HIPPS when: l High pressures or flow rates are required l The environment needs to be protected from process fluid contamination l The economic viability of an installation needs improvement l The risk level of an installation needs to be reduced CAPEX and OPEX Reduction In addition to optimum pressure protection, HIPPS offer operators significant CAPEX and OPEX savings. New Installations l Avoids the requirement for expensive flare systems and pressure relief valve manifolds l Offer significant weight savings for offshore installations l For wellhead installations, allow pressure ratings for downstream piping and instrumentation to be reduced Existing Installations l Avoids the requirement to upgrade flare systems and pressure relief valve manifolds Total Valve Control

3 Turnkey Integrated Solution We understand that operators have far more pressing issues than expediting multiple vendors, and managing the certification process for HIPPS. We provide a single point of contact for the provision of comprehensive turnkey and integrated solutions We offer: l Full engineering design support for any HIPPS application l Full compliance with IEC Edition 2 up to SIL 3; including system and sub-system calculations and documentation set: l SIL calculations l Safe failure fractions l HFT requirements l Partial Stroke Testing (PST) frequency determination l 3rd party certification l Fast closure times up to 2 seconds l API and ASME valves up to 42 l Skid design and fabrication via our manufacturing partner, L & N l Installation, commissioning and servicing support l Valve actuator designs and manufacturing based on 30 years experience in the Oil & Gas industry l World class and proven logic solver l Full diagnostics capability l Compact manifold design control systems l Hydraulic power units l All instrumentation

4 HIPPS Architecture The exact configuration of a HIPPS System will be dependent on the specific application; however, as a minimum all HIPPS Systems include the following components: l A mainline valve l A valve actuator l A valve actuator control system l A logic solver One defining characteristic of all HIPPS Systems is the duplication of system components to provide failure redundancy; ultimately resulting in higher system integrity. Below is a common HIPPS with redundant pressure transmitters, valve actuators, solenoid valves and block valves. Isolation Valve Pressure Transmitter Logic Solver Solenoid Valve Valve Actuator Block Valve Total Valve Control

5 HIPPS Components Mainline Valve l Typically will be trunnion mounted, double block bleed ball type due to proven tight shut-off, high reliability and low operating torque requirements. Ultimately the final valve selection will be based on application specifications and end user preference. Valve Actuator l Spring-return scotch-yoke or linear piston designs reflecting Paladon Systems thirty years experience with providing valve automation solutions for the most demanding applications in the Oil & Gas industry. Valve Actuator Control System l Bespoke systems available for any HIPPS applications. Manifold designs to maximize durability and reliability. Logic Solver l Working with our Sira/CASS certified technology partner HG Safety, we provide TUV/AK6 certified logic solvers. Our logic solvers use standard, proven and function block software which allows for numerous options such as partial stroke testing, and valve function logging to support preventative maintenance programs. Communications to all major DCS systems and customized third party communications interfaces are also available. The SIS controller can be provided up to a range of IEC SIL 3 platforms, to include scalable 2oo3 pressure transmitters and 1oo2 solenoid valve packages. The final SIS choice is dictated by functionality and availability requirements, system costs and client preferences. All systems are independently third party certified to ensure compliance with all current legislation and industry standards

6 Additional Products l PN & HY-Series Scotch-Yoke Actuators PN & HY-Series actuators are high performance pneumatic and hydraulic scotch-yoke actuators designed to operate any quarter-turn mechanism in both double-acting and spring-return configurations. l PNL & HYL-Series Linear Actuators PNL & HYL-Series are high performance pneumatic and hydraulic actuators designed to operate any linear valve or mechanism in both double-acting and spring-return configurations. l Electro-Hydraulic Control Systems These systems use electric pumps to pressurize hydraulic accumulators to provide hydraulic power. Stand-alone units using solar panels are also available when local utilities are unavailable or unreliable. l Electro Hydraulic Positional Control Systems Suitable for both Choke and Control Valve applications, operating from either existing ring main or self-contained power sources. Available for both Offshore Hazardous locations and Industrial Power Generation l GH-Series Gas-over-Oil and DG-Series Direct Gas Actuators GH-Series and DG-Series actuators are typically used in gas pipeline applications. For GH-Series, the hydraulic supply pressure is provided by the pipeline gas pressure acting on oil within the tanks in the control system. For DG-Series, the pipeline gas is used directly to power the actuator. l Subsea Actuators The rugged and flexible design does not require pressure compensation for depths down to 650 ft (200m). For deeper applications, a pressure compensated design is available for depths down to 6,500 ft (2,000m) Total Valve Control