It will take you through all aspects related to the role of relief valve in overpressure protection. A Bow-Tie diagram is used to explain the top event and how preventive barrier such as relief valve will try to prevent the safety incident. Then it takes you through the type of relief valves and other relief devices explaining its functions.
List of relief scenarios commonly encountered in process upsets are discussed. Relief load calculation techniques and importance of fluid properties are relieving conditions are explained. Relief valve sizing equations for vapour/liquid/2-phase fluid reliefs are explained. Hydrocarbon phase envelope is used to explain two phase fluid region of a multi-component system. The input parameters for sizing the relief valve along with its use and limitations are explained.
Relief load estimation and reliving property estimation are explained for various relief scenarios commonly encountered. Relief scenarios such as gas/liquid blocked outlet, open pool fire case with liquid vapourisation/ gas expansion, gas/liquid control valve wide open, gas blowby/vapour breakthrough, tube rupture, distillation column scenarios, abnormal heat input, reverse flow through check valves, leakage flow are explained. Equations to estimate flow through wide open control valve and flow through restriction are also explained for gas/liquid service.
Apart from sizing of relief valves, other factors such as effect of backpressure, low temperature, administration controls (LO valves) are explained. Design considerations to avoid operational problems such as chattering and plugging are discussed. Alternatives to relief devices and further reading is then explained.
2.1 Process safety risks associated with in process industries
2.2 What is a relief valve and where are they used
2.3 Various types of relief devices used in industries - Relief valves, PVRV, Buckling Pin, Rupture disk, BDV
3.1 Relief load estimation - Overpressure protection scenarios
3.2 Relief load estimation - Using process simulators or manual calculation
3.3 Estimation of properties of fluid at relieving conditions
4.1 Relief valve sizing - Single phase vapour
4.2 Relief valve sizing - Single phase Liquid
4.3 Relief valve sizing – Two phase fluid (Vapour+Liquid)
5.1 Case Study - Liquid Blocked outlet scenario - Positive displacement pump
5.2 Case Study - Gas blocked outlet scenario, PD compressor, Isentropic compression
5.3 Fire Case Introduction
5.4 Case Study - Fire case - Liquid vapourization (Wetted surface), Constant volume process
5.5 Case Study - Fire case - Gas Expansion (Unwetted surface), Constant volume process
FREE PREVIEW5.6 Case Study - Two-phase fluid (vapour+liquid) blocked outlet scenario
5.7 Case Study - Control valve wide open case, Gas line control valve or pressure regulator
5.8 Control valve wide open case - Gas flow rate estimation
5.9 Control valve wide open case - Liquid flow rate estimation
5.10 Case Study - Control valve wide open case, Gas blowby or Vapor breakthrough
5.11 Case Study - Heat Exchanger Tube Rupture
5.12 Estimate Liquid or Gas flow rate through an orifice - Case Study Exchanger Tube Rupture
5.13 Case Study - Distillation Column System - Potential Relief Scenarios
5.14 Case Study - Abnormal heat input
5.15 Case Study - Reverse flow through Check Valves
5.16 Case Study - Leakage flow (e.g., through HIPPS valve)
6.1 Other factors for relief valve (Effect of backpressure, Low Temperature, LO-LC Valves)
6.2 Practical problems with RV operation (Chattering, Plugging of pilot RV, Plugging of bonnet)
6.3 Alternatives to relief valve for overpressure protection of equipment
6.4 More resources on relief valves
Process Engineers, Technical Safety Engineers, HSE Engineers, Mechanical Engineers, Plant Operators, Students, others
Anyone who is interested to learn about sizing of relief valves used in process industry
Joy Dass
I have done Bachelor of Chemical Engineering.
I have received Chartership from Institute of Chemical Engineers (IChemE, UK) and achieved the status of Chartered Chemical Engineer (CEng MIChemE).
I have 18+ years of experience working in Process Engineering. I have worked on various phases of engineering projects including Feasibility studies, Concept selection, Basis for Design development, FEED and Detailed Design stages.
I have worked with multi-national engineering and consulting companies in various countries namely India, Oman, UAE and Brunei.
This course will help young engineers to understand the concepts related to sizing of relief valves. The course is curated keeping in mind to provide these benefits
Introduction to Sizing of Relief Valves for Oil & Gas, Refinery, Petrochemical & Chemical Process Industries
Learn concepts to identify and evaluate relief scenarios
Pictorial representation of concepts for better visual understanding
Understand thermodynamic relations to estimate relieving temperatures and how to apply them
Know the equations for estimating flow through control valves and restriction orifice
Relief load estimation/sizing with case studies on real application in process industry
Design considerations to avoid relief valve operation problems
Opportunity to get tutored by experienced professional having natural ability to explain in interesting and easy to understand way
Firstly, I want to acknowledge the course presenter for explaining this topic in simplified and structured way. The course is organized in innovative way. Al...
Read MoreFirstly, I want to acknowledge the course presenter for explaining this topic in simplified and structured way. The course is organized in innovative way. All the topics those are covered in this course are useful and informative. The presenter gave us value for our time, I really appreciate. Thank you for imparting this wealth of knowledge to process engineering community. - Mr. Nitin CEng MIChemE
Read LessAlmost all points are covered for understanding psv
Almost all points are covered for understanding psv
Read Less