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Why is a Rupture Disc Installed Upstream of a PSV?, Explained with Diagram, Rupture Disc, Pressure Safety Valve

Hello Engineers, In this video, we explore the reason behind installing a Rupture Disc (RD) upstream of a Pressure Safety Valve (PSV) in process systems. Whether you're a chemical engineer, process engineer, or a student preparing for interviews or exams, this video will give you a clear and visual understanding of the RD + PSV configuration using a simple 2D diagram.

🎯 Topics Covered in This Video:

What is a Rupture Disc?
Function of a PSV (Pressure Safety Valve)
Why Rupture Disc is placed before PSV
Use cases: Corrosive fluids, toxic media, and sterile systems
API and ASME standards (API 520, ASME Sec VIII Div 1, ISO 4126)
rupture disc upstream of PSV
why rupture disc is used before PSV
rupture disc and pressure safety valve
PSV and RD combination
pressure relief system design
rupture disc vs PSV
PSV protection with rupture disc
API 520 rupture disc
ASME rupture disc installation
rupture disc working principle
pressure relief valve design
PSV sizing and selection
pressure relief device standards
API 520 and API 521 explained
overpressure protection in chemical plants
pressure relief devices in process engineering
rupture disc for toxic fluids
PSV leakage prevention
corrosion protection for PSV
What is the purpose of a rupture disc before a PSV?
Difference between rupture disc and safety valve
When to use rupture disc with pressure relief valve?
How to protect PSV from corrosive service?
Rupture disc design as per ASME Section VIII
Industrial application of rupture disc and PSV setup
Rupture disc installation guidelines API 520
Process safety devices for overpressure protection

📘 References:
API 520 (Part I & II)
ASME Section VIII, Div 1 (UG-125 to UG-137, Appendix M)
ISO 4126 Series

💡 Whether you're working in the oil & gas, chemical, or pharmaceutical industry—or preparing for technical interviews—this video will deepen your understanding of overpressure protection systems.

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✍️ Drop your questions or suggestions in the comments—we reply to everyone!

#RuptureDisc #PSV #ProcessEngineering #API520 #ASME #ChemicalEngineering #ReliefValve #OverpressureProtection #EngineeringExplained #PipingDesign

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Timestamps:

(00:00) : video starts
(00:43) : Standards to refer for RDs and PSVs
(02:06) : Protect the PSV from Corrosive or Toxic Fluids
(04:41) : Prevent Leakage Through the PSV
(06:48) : Reduce Maintenance Cost
(07:51) : Dual Relief Protection
(08:50) : Maintain Cleanliness
(09:44) : Thanks for watching

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