What is Process Hazard Analysis aka PHA in Reality?
The process of Process Hazard Analysis (PHA) is a very rigorous and ultra systematic approach of identifying, evaluating, and controlling all sorts of hazards of processes that involves very highly hazardous chemicals. Consequences that get addressed can include complete employee safety, environmental impact, public safety, extent of possible equipment/facility damage, and all effects on public image. Causes of such type of situations are then identified, and the scenarios are then ranked on found severity as well as frequency of occurrence.
These safeguards currently are in place and are accounted for, and wherever the risk is unmitigated or deemed completely unacceptable, that’s when recommendations for follow up actions are provided. A management review is eventually conducted to determine what all possible changes will be made. At the end, the goal of performing a PHA is just not to label a process as “safe”, but to make sure all the possible unprotected situations are detected and then trigger the necessary safety improvements in order to reduce and minimize risk.
When can you conduct a PHA session?
The process of risk analysis for any hazardous procedure should be conducted for each and every stage of design, operation, and shut down. PHAs are required to be completed in the starting and then have to get them revalidated after every five years. However, all major changes that are made to a process warrant, a total re-do has to be conducted earlier. Furthermore, when either of the temporary or permanent modifications is made to a hazardous procedure, a Management of Change aka MOC PHA should be also be utilized to evaluate all the inherent hazards that can possibly result from the change. There is much applicability of many PHA techniques during some of the different phases of a process lifecycle.
Serious safety incidents can continue to occur at an alarming frequency across all major industries and during all possible stages of operation. Awareness and looking in to the nitty gritties of the situation with perfect attention to details are essential for avoiding serious accidents. Like it is said, a process risk analysis is only as good as the team which has assembled to conduct it.
Who all should be involved in a PHA session?
A PHA team should consist of a minimum of a process engineer, an operator, and a facilitator the leader. In order to make that everything is effectively used to identify safety consequences. People knowledgeable of the process and the hazards associated with it must be fruitful for the analysis. Engineers of the subject matter should be experts in reactive chemistry, flammability, combustible dust, electrostatics or electrical hazards, as well as all other process safety hazards, and should be available to facilitate or participate as specialists on teams conducting a risk analysis.
In the end I would like to say process safety hazard analysis is one of the most vital parts of the system. It can help preventing many life threatening accidents. Every industry should make it a point that a proper well qualified team should conduct this procedure.
If you are looking for more information on this topic click here now