Scope:

• Introduction to safety relief valves
• Methodology diagram for pressure relieving system design
• Scenarios and Load Analysis for Pressure Relief
• Overall Relief Load Determination
• Flare System Sizing
• Relief Load Mitigation

Process engineer / senior process engineer

• Introduction to Safety Relieve Valves
- Important definitions valves
- Pressure in mechanical design
- Types and application of safety relief valves
- Standard overpressure guide_ Pressure-Level relationship for relieve valves
- Pressure relief valves sizing (prelim)
- Example for discussion

• Overpressure Protection Philosophy
- Proper Design Philosophy
- Using of administrative control
- Double Jeopardy
- Credit of Favorable Instrument Response
- Operator Error / Effect of Operator Response
- Role of Instrumentation in Overpressure Protection
- Example for discussion

• Scenarios and Load Analysis for Pressure Relief
- Fire (liquid boiling, gas expansion)
- Blocked Outlet
- Overfilling
- Thermal expansion
- Check valve leakage or failure,
- Control valve failure
- Vapor blow through
- Cooling water failure
- Power failure
- Instrument air failure
- Reflux failure
- Abnormal heat input
- Loss of feed
- Exchanger tube failure
- Reaction runaway
- Example for discussion

• Vapor Depressurization

• Overall Relief Load Determination+
o Fire case
o Electrical power failure
o Cooling Water failure
o Instrument air failure
o Depressurization

• Flare System Sizing (Overview and Crietria)
- General criteria
o Consideration for system segregation
o Inlet PSV piping
o Discharge PSV piping
o Header size determination
o Flare stack
o Flare KO drum
o Flare drum pump
o Purging Requirement
- Example for discussion

• Relief Load Mitigation
- Factors driving to mitigate relief load
- Mitigation method
o Application of SIS
o Application of HIPP