Process safety regulations are performance-based. They anticipate that performance standards will evolve and improve over time and they require compliance with good engineering practices. Over the past few years, a number of approaches that go beyond the basics of traditional PHA have been developed, documented, and applied. Companies should implement these approaches to ensure compliance with the regulations and the responsible management of risk. This PHA training course goes beyond the fundamentals of facilitating the performance of PHA covered in Primatech's course Process Hazard Analysis (PHA) for Team Leaders and deals with more advanced issues.
The competence of PHA study teams is fundamental to the quality of PHA studies and must be addressed by a competence management program. All PHA methods suffer from a number of weaknesses. An understanding of these weaknesses allows their adverse impact on the quality of studies to be minimized.
The performance of PHA on batch and non-steady-state processes is more involved than for continuous processes. PHA methods such as HAZOP have been extended to deal with these types of processes. Increasingly, PHA is performed on procedures. Human errors are the most significant contributor to process risks and, of course, procedures link people with the process. Thus, procedural PHA plays an important role in providing a thorough treatment of human errors.
Many processes today are automated and computer control systems play vital roles in their safe operation. The importance of computer control systems merits the performance of PHA explicitly on them. Special techniques, such as computer HAZOP (CHAZOP), have been developed for this purpose.
Hazard scenarios that involve domino effects have occurred in many processes over the years. They are catastrophic events that can destroy entire facilities and cause significant loss of life but traditional PHA methods do not provide an adequate consideration of them. Improved methods are now available to address domino events in PHA.
Reactive chemical hazards are important in many processes, even those where intended reactions are not being conducted. Some process owners are unaware of the reactive chemical hazards present in their processes. Thus, it is important to understand the different types of reactive chemical hazards that may be present in a process and be able to identify them. When present, they must be addressed in PHA studies. However, conventional PHA has not done a very good job of doing so. However, improved PHA methods have been developed recently to address reactive chemical hazards.
Traditional PHA methods can be time consuming and onerous for the people who conduct them. The major hazards analysis (MHA) method was developed to overcome these problems and provide an efficient and effective method for identifying the hazard scenarios for a process. Another recent innovation is the development of bow-tie diagrams to depict graphically the hazards of a process and the barriers that protect against them. They are used as a communication tool with management and operations and maintenance personnel.
Frequently, PHA studies are used to provide information for Layers of Protection Analysis (LOPA) studies, for example, to help meet the requirements of the IEC 61511 / ISA 84 standard on safety instrumented systems. Appropriate guidelines must be followed in performing PHA to ensure that the information needed for LOPA is provided.
All of these topics are addressed in the course. Examples are provided of the application of the PHA approaches described and attendees participate in workshop sessions to gain experience using them.
To learn advanced methods in process hazard analysis and be able to apply them in studies.
PHA team leaders / facilitators; PHA participants; process safety coordinators.
Experience or formal training as a PHA team leader, such as Primatech's training course, Process Hazard Analysis (PHA) for Team Leaders, or equivalent.
- Competence of PHA teams
- Understanding and addressing weaknesses in PHA methods
- Major hazards analysis
- Understanding domino effects
- Domino effects and PHA
- PHA for batch and non-steady state processes
- PHA for procedures
- IEC 61511 / ISA 84 standard and LOPA
- LOPA and PHA
- Overview of reactive chemical hazards
- Identifying reactive chemical hazards
- Addressing reactive chemical hazards in PHA
- Characteristics of control systems and their failures
- CHAZOP and PHA for computer control systems
- Bow-tie diagrams
Duration / Credits
- Three days
- 2.1 CEUs or 21 PDHs awarded
- For USA Courses, see Schedule