1. Hazardous Area Classification ( Download Flyer)
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| Hazardous Area classification identifies areas in a plant where flammable atmospheres can be found and additionally provides an estimate of how often they may be found there. |
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| Hazardous Area Classification is determined by site audit work. It requires a study of the flammable materials used on site and examination of plant and equipment. The basic idea is to establish where flammable atmospheres occur as part of routine operations and also as a result of failure of whatever type, excluding catastrophic failure of plant. The study requires flammability data on materials which are sometimes available on record, and or determined by measurement in a specialist process safety laboratory. |
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- Design & Engineering
- Design safety review
- Developing process safety information, including
- Process flow diagrams (PFDs)
- Process chemistry
- Maximum Intended Inventories
- Safe upper and lower operating limits and consequences of deviations
- Materials of construction
- Piping and instrumentation diagrams (P&IDs)
- Electrical classification drawings and interpretation of codes and standards regarding area electrical classification
- Relief system design and design basis, including determining relief valve sizing bases and evaluating flare header capacity, liquid knockout requirements, and flare stack design for adequacy
- Ventilation system design information such as compressor building ventilation systems, including interpretation of applicable codes and standards for determining ventilation requirements
- Identifying design codes and standards employed in the design of a process
- Material and energy balances
- Safety systems documentation including safety system plot plans and written descriptions of safety systems (e.g., interlocks, detection, or suppression systems)
- Identifying recognized and generally accepted good engineering practices (RAGAGEP) used in the design of a process
- Emergency Relief & Venting
- Flare Systems
- Safety Interlocks
- Fire Protection
- Critical Equipment Identification
- HAZID / HAZOP
- Safety Philosophy
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| 2. Process Hazard Analysis (PHA) (Download Flyer) |
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Process Hazard Analysis (PHA) is a term referencing a variety of techniques that are adept in identifying hazards and hazard scenarios. The PHA is a proactive attempt by chemical process operations to understand what can go wrong, how likely it is to go wrong and what steps are necessary to prevent or mitigate undesired consequences. Without a proactive approach, without "searching out" process hazards, we are condemned to await each consequence of human error, and equipment or system failure.
Prevention is our best defense, but we cannot defend against that which we do not recognize. |
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| Our Services |
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| We can provide a full range of PHA services, using a variety of techniques listed below. |
- Hazard and Operability Studies (HAZOP)
- What-if
- Checklists
- Failure Modes and Effects Analysis (FMEA)
- Fault Tree Analysis (FTA)
- Event Tree Analysis (ETA)
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| The following are just a few of the many ways we can assist you in developing and managing a successful PHA for your company. |
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PHA Preparation (compile information required to conduct PHA)
To properly conduct a PHA a great deal of information is required about the materials handled, the chemical process and conditions, the control methods employed, and the equipment and systems used. This information resides in the design manuals, operating procedures and equipment files of the process of interest.
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PHA Facilitation and Documentation (Lead and Scribe PHA)
Our PHA Team Leaders can play two separate, but equally important roles as a technical facilitator and as a process safety expert. A PHA is always a team effort, and the success of the study depends on the quality of the team. Your PHA Scribe team is used to relay operational experience about the facility being evaluated, and to provide technical opinions about the design conditions and constraints of the equipment. It is therefore important that a balanced team structure be achieved.
A lot of time and effort goes into a PHA study, and the information gathered during the study can be retained as useful reference information and our experienced PHA Leaders will document the discussions during a PHA meeting.
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| PHA Revalidation (ensure PHA addresses current operating conditions) |
- PHA revalidation
- Integrating human factors into PHA
- Consequence analysis, including atmospheric dispersion
- Quantitative Risk Assessment (QRA)
- Safety Integrity Level (SIL) or layer of protection analysis
- Human Reliability Analysis (HRA)
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