Stages vise Hazard Analysis & Identification Techniques

Plant Stages wise Hazard Identification and Hazard Analysis Techniques

The life span of a process industry comprises a number of stages from conceptual to decommissioning. Each stage of a plant may have hazards, some general and some stage specific. Hazard identification and risk analysis techniques that may be applied at different stages of a plant are given in below Table. 

No.

Project Stage

Hazard identification/ Hazard Analysis Techniques

1.	Pre-design	a.Hazard Indices
		b.Preliminary Hazard Analysis (PHA)
		c.What-if analysis
		d.Checklists

2.	Design Modification	a.Process design checks and checklist
		b.HAZOP studies
		c.Failure modes and effects analysis (FMEA)
		d.What-if analysis
		e.Fault tree analysis
		f.Event tree analysis

3.	Construction	a.Checklists
		b.What-if analysis

4.	Commissioning	a.Checklist
		b.Plant safety audits
		c.What-if analysis

5.	Operation and maintenance	a.Plant safety audits
		b.What-if analysis
		c.Checklists

6.	Decommissioning or Shutdown	a.Checklists
		b.What-if analysis

 Reference: IS 15656 2006