(113e) Pressure Relief Valve Sizing Concerns for Valves in Ethylene, Propylene, and Ethane Service
AIChE Spring Meeting and Global Congress on Process Safety
2014
2014 Spring Meeting & 10th Global Congress on Process Safety
The 26th Ethylene Producers’ Conference
Ethylene Unit Safety Session
Wednesday, April 2, 2014 - 10:05am to 10:30am
Sizing pressure relief valves is a complex process for any chemical or petrochemical; however, relief devices in Ethylene, Propylene, and Ethane service can raise some unique concerns. One concern is how the chemicals’ physical properties affect the operating conditions. Chemical processes of Ethane, Ethylene, and Propylene are frequently operating in thermodynamic supercritical conditions because the chemicals’ temperatures and critical pressures are low. Operating in thermodynamic supercritical conditions makes it even more imperative that the engineer ensures accurate physical properties are used in the analysis. Another unique concern is the cryogenic processing conditions of these chemicals, which makes it challenging to meet material and brittle fracture hazards. The last unique concern is the decomposition of these chemicals when at elevated pressure. All three chemicals, but especially Ethylene, can decompose upon rapid depressurization from pressure greater than 4000 psig.
This paper is a brief analysis of these special considerations and how they could potentially affect a relief systems design.
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2014 Spring Meeting & 10th Global Congress on Process Safety
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The 26th Ethylene Producers’ Conference only
AIChE Pro Members | $100.00 |
Fuels and Petrochemicals Division Members | Free |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $150.00 |
Non-Members | $150.00 |