Overview

This course is also available as part of my engineering training library on chemengpro, where I share tools, templates, and bonus materials for engineers.Chapter 1: Introduction to Pressure Relief DevicesUnderstand the purpose of pressure relief valves (PRVs) in industrial systemsCompare pressure relief valves vs rupture discs - pros, cons, and typical use casesLearn the function of relief devices in series and when dual protection is requiredChapter 2: Types of Relief Devices and How They OperateExplore the types of pressure relief valves: spring-loaded, weight-loaded, balanced, and pilot-operatedUnderstand the impact of back pressure on PRV performanceCompare conventional vs balanced pressure relief valvesLearn key pressure safety definitions:Set pressure, design pressure, maximum allowable working pressure (MAWP), overpressure, accumulation, blowdown, closing pressure, relieving conditionsIdentify the mechanical components of a PRVUnderstand open vs closed bonnet designsLearn the differences between gas relief valves and liquid relief valvesIntroduction to:Balanced PRVsPilot-operated PRVsRupture disc devicesRupture pin technologyChapter 3: Pressure Relief Standards and CodesUnderstand the difference between codes vs standards Introduction to ASME Boiler and Pressure Vessel Code (BPVC) Overview of ASME certification requirements for PRVsIntroduction to API 520, 521, and 526 standards related to relief valve sizing and designChapter 4: Overpressure Protection Scenarios and Design PhilosophyIdentify common overpressure scenarios in process industriesDifferentiate between reasonable and unreasonable scenariosUnderstand the concept of double jeopardy in risk assessmentAnalyze causes of overpressure with examples:Operator errorInstrumentation failureBlocked or closed valvesCheck valve failureUtility failure (e.g., cooling water, steam, power)Plugged filters or ventsHeat exchanger tube ruptureChemical reactionsHydraulic expansionFire exposure:Fire in liquid-filled vessels scenarioFire in gas-filled vessels scenarioLearn best practices for fire overpressure protectionUnderstand the limits of PRVs - when additional safeguards are neededIntroduction to underpressure scenarios and vacuum reliefLearn about the required documentation for a complete relief system design packageChapter 5: Relief Valve Sizing Calculations and API/ASME MethodologyFollow API/ASME-compliant pressure relief valve sizing guidelinesUnderstand key sizing considerations:Orifice area selectionEffective area vs actual areaRated vs effective discharge coefficient (Kd)Review PRV inlet pressure loss and outlet back pressure limitationsUnderstand Cold Differential Test Pressure (CDTP)Determine relieving pressure for:Single-failure contingenciesMultiple (double) contingenciesFire case scenariosPerform PRV Sizing Calculations for:Gas service - Critical flowGas service - Subcritical flowSteam relief valvesLiquid relief valves (High Viscosity and Low Viscosity)Rupture Disc Sizing and SelectionLearn rupture disc sizing methodology under API/ASMEDefine and apply:Burst pressureManufacturing rangeBurst toleranceOperating ratioUnderstand how to select, specify, and size rupture discs for industrial applications

Skills

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