Structure of the Workbook

Most of the relief sizing equations given in Chapters 6-8 yield the two-phase required relief rate, W. The two-phase mass flow capacity per unit area, G, is then needed in order to obtain the required relief area. Chapter 9 contains important background information about two-phase flow, and calculation methods for G. Some system types are special cases involving highly viscous (laminar) flow, solids and/or 

Chapters 11-13 cover the selection and sizing of downstream disposal systems, reaction forces which require piping and vessel supports, maintenance, documentation and change management. Additional material is given in Annexes 1-8 and is referenced from the,text as required. This includes consideration of any safety factor to be applied to the calculated relief size. 

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The structure of the Workbook is summarised by the flowchart in Figure 2.2 which indicates the paths to be taken. through the Workbook when carrying out any particular relief system design. 

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