A simple, cost-effective approach to relief system sizing is outlined using DIERS (Design Institute for Emergency Relief Systems)-based calorimetry data for vapor, gassy, and hybrid systems. Easy-to-use screening guidelines are provided, eliminating the need for knowing thermophysical properties.

Properly Size Vents for Nonreactive and Reactive Chemicals

The subject of process safety is so broad in scope that this chapter must be limited to the application, design, rating, and specifications for process overpressure-relieving devices for flammable vapors and dusts; process explosions, runaway chemical reactions and external fires on equipment; and the venting or flaring of emergency or excess discharge of gases to a vent flare stack. The subject of fire protection cannot be adequately covered; however, the engineer is referred to texts dealing with the subject in a thorough manner [ 1. ; 2. ; 3. ; 4. ; 5.  ; 5. ].

Process safety and pressure-relieving devices

References Part 3

In design of pressure relief systems, a pool fire is one of the most typical relief cases. The first step in the fire relief calculation is determining the heat flux input from the fire and methods include the simple to the very complex, covering a myriad of factors and configurations. This article illustrates one method where the heat input is limited by the fuel supply. This method complements one traditional method where the heat input is limited by the equipment exposed area. The scope of the article is limited to the calculation of the heat release, and does not discuss the behavior of the fluid in subject equipment, the relief rate or relief device sizing. © 2014 American Institute of Chemical Engineers Process Saf Prog 34: 214–219, 2015

/pdf/the-pool-fire-case-for-pressure-relief-radiation-exposure-oke7qk0dy5.pdf

The pool fire case for pressure relief: Radiation exposure limited by fuel supply

Although there is no single authoritative source of acceptable definitions of the terminology used in Probabilistic Risk Assessment (PRA), it is widely accepted that the term risk implies the consideration of the measure of some form of loss in terms of both the likelihood and the magnitude of that loss. This section presents the various methodologies and procedures used to calculate or estimate the unwanted consequences, effects, impacts or outcomes of severe accidents involving substances of a hazardous nature.

Methods for Estimating Frequency and Magnitude of Accidental Emissions

Une soupape de surete pour decompresser un recipient pouvant etre expose a un incendie peut etre dimensionnee differemment en raison de l'incompatibilite entre les codes applicables. Resume de ces variations et criteres d'evaluation des correlations pertinentes

R. A. Crozier

Papers

Sizing relief valves for fire emergencies