Designs that lacked inherent safety: case histories

Area of Science:

• Chemical Engineering
• Process Safety
• Risk Management

Background:

• Industrial incidents highlight gaps in applying Inherently Safer Design (ISD) principles.
• Past designs often failed to fully integrate ISD, leading to preventable accidents.
• Case histories reveal recurring issues in plant layout, chemical compatibility, and piping systems.

Purpose of the Study:

• To analyze case histories where ISD fundamentals were not adequately applied.
• To demonstrate how ISD principles could have mitigated or prevented specific industrial incidents.
• To emphasize the importance of integrating ISD into initial and re-design processes.

Main Methods:

• Review and analysis of multiple industrial incident case histories.
• Examination of plant layout, chemical storage, and piping system designs.
• Identification of specific failures in applying ISD principles.

Main Results:

• Plant layout deficiencies, such as inadequate physical separation, contributed to property damage and injuries.
• Poor design allowing incompatible chemical reactions led to fires and toxic gas releases, causing equipment damage and public threats.
• Substandard piping design and identification resulted in unnecessary and costly repairs.

Conclusions:

• Adherence to ISD principles, including physical separation and proper chemical management, is crucial for reducing incident severity and frequency.
• Implementing ISD techniques proactively in design and re-design phases is essential for improving industrial safety performance.
• The case studies underscore the need for a robust application of inherent safety strategies to prevent accidents and protect assets and the public.