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close this bookConducting Environmental Impact Assessment in Developing Countries (United Nations University, 1999, 375 p.)
close this folder9. Emerging developments in EIA
close this folder9.4 Environmental risk assessments
close this folder9.4.11 Guidelines for disaster management planning
View the document(introduction...)
View the document9.4.11.1 Specification
View the document9.4.11.2 Plot plan
View the document9.4.11.3 Hazardous area classification
View the document9.4.11.4 P & I diagrams
View the document9.4.11.5 Storage of inflammable liquids
View the document9.4.11.6 Risk assessment P & I diagrams

P & I diagrams are the documents which are prepared at the earliest stage of the design of a plant. It shows all the equipment in position, process and utility valves, instruments, control system, safety valves and other safety devices. After the zero revision, the P & I is reviewed in great detail taking all aspects into consideration, regarding safety of the plant under all eventualities. One of the methods used for the process may be a hazard and operability study (HAZOP study).