exida Recorded Webinars

How a Bad PHA/LOPA Can Damage the Design of your Safety System

Recording Date: October 2020

Hazard and Operability Study (HAZOP) is one of the most popular methodologies for Process Hazard Analysis (PHA). Layer of protection analysis (LOPA) is a methodology to further quantify the risk following up on the PHA.

These two exercises pave the foundation for the design of the Safety Instrumented System (SIS). We will first look at the basic ideas about PHA and LOPA and look at the causes for the problems. Finally we will move on to a few consequences and the impacts of a bad HAZOP and LOPA on the SIS.

View Webinar   


About the Presenter:

Paul Chan, CFSP

Paul Chan Paul Chan was educated at the University of Hong Kong, majoring in Biochemistry while minoring in Biology and Economics. He finished a project on RNA Bioinformatics and helped in setting up an RNA database. He had experience with Python programming language and UNIX OS system. He later finished a master’s degree in English Literary Studies and finished a few creative projects. However he rekindled his passion for Science and the technical field, and joined exida in the summer of 2014, when he was immediately put onto the SRIP project (HAZOP and SIL selection workshop) in Seoul. Later he had extensive experience with SIL verification with notable clients like ConocoPhillips and Cristal. He received his CFSP certification in Sep 2015.