October 2018

Special Focus: Plant Safety and Environment

Built-up backpressure at the outlet flange of a pressure relief valve

Even for pressure relief valves (PRVs) discharging directly to the atmosphere through short tailpipes, API 520 Part 11 warns that choked flow may develop at the outlet flange, resulting in high backpressure.

Techint Engineering & Construction: Cordero, G. O.

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Cordero, G. O. - Techint Engineering & Construction, Buenos Aires, Argentina

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October 2025

October 2018

Special Focus: Plant Safety and Environment

Built-up backpressure at the outlet flange of a pressure relief valve

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