Process Plant Layout, 2nd Edition

Appendix B

Hazard Assessment Calculations

B.1 Introduction

B.1.1 Scope

The approaches and equations presented in this appendix are given to aid the assessment procedure outlined in Section 8.6 and are intended only for in-house assessment of layouts. Simple manual methods are given so that order of magnitude calculations can be made quickly.

The results of the calculations will hopefully give indications to the engineer of how they can improve the safety of a layout. In some cases the methods may give rise to excessively pessimistic results, but this is good practice with initial rough calculations.

The calculations, however, are not meant to be used for final justification of layouts. For this, a more detailed assessment is often required. ...