Siting and Layout
This ebook describes issues to consider when choosing a site for a process facility. Also discussed are the layout and spacing of equipment, utilities, buildings, roads, emergency equipment and piping and valves. (Futher information is provided in the article Siting and Layout of Process Facilities and in Safety Moment #57: Equipment Spacing (Pumps/Fireproofed Pipe Racks)).
The words ‘siting’ and ‘layout’ are often used interchangeably, but, strictly speaking, they have different meanings. Siting is concerned with the location of a facility. For example, if a company is planning on building a new chemical plant its management may consider the relative merits of sites in Texas, Mexico or China. Layout, on the other hand, is to do with the locations of equipment, piping and buildings at the selected site and how they connect with one another.
Moran (2016) divides the term ‘Layout’ into:
- Site Layout ― How plots within the site relate to one another and to facilities outside the site.
- Plot Layout ― How process units relate to one another.
- Equipment Layout ― How individual equipment items are laid with respect to one another.
Most layout decisions will be made during the design phase but the topic also needs to be considered when making facility modifications, particularly when new equipment or piping is being added.
Table of Contents
Regulations and Standards
Layout Risk Analysis
Blocks and Roads
Routine Access and Egress
Manual Alarm Call Points
Process Isolation Valves
Emergency Showers and Eyewashes
Hydrocarbon Storage Tanks
Compressors / Compressor Drivers
Piping and Valves
Flares and Vents
Stairways and Ladders
Safety Cages and Gates
Rungs and Stringers
Guardrails, Handrails and Toeboards