November 2010

Special Report: Plant Safety and Environment

Consider new analysis for flares

Applying dynamic models in designing safety systems can reduce capital costs

Matzopoulos, M., Urban, Z., Marriott, J., Process Systems Enterprise Ltd.; Marshall, B., Softbits Consultants Ltd.

Application of dynamic modeling for relief system design can substantially lower capital expenditure (CAPEX) while simultaneously improving plant safety. This article considers using dynamic analysis to two areas: vessel depressurization (or “blowdown”) and flare network design. New modeling methods can accurately quantify relief loads and metal temperatures to enable informed safety and CAPEX decision support. Case history 1: Vessel depressurization Detailed dynamic analysis of the rapid depressurization (blowdown) of high-pressure vessels is a key element of the safety analysis of oil and gas facilities and other high-pressure installations. Event description. Depressurization

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