Process safety analysis assessment

Process Safety Analysis This part treats the analysis of a process or project from the standpoint of hazards, risks, procedures for making potential damage estimates, and project reviews and audits. It can be helpful to management in assessing risks in a project. It consists of the following ... 

The objective of the book is not to turn the reader into a specialist in thermal safety. It is to guide those who perform risk analysis of chemical processes, develop new processes, or are responsible for chemical production, to understand the thermal aspects of processes and to perform a scientifically founded-but practically oriented-assessment of chemical process safety. This assessment may serve as a basis for the optimization or the development of thermally safe processes. The methods presented are based on the author s long years of experience in the practice of safety assessment in industry and teaching students and professionals... 

Lastly, in the nineteen nineties, OSHA s Process Safety Standard was introduced as 29 CFR 1910.119, requiring hazard analysis and process safety assessment of selected hazardous substances. For example, use of methanol in dye and pigment syntheses now requires an extensive process safety analysis and audit. 

Process Hazards Analysis. Analysis of processes for unrecogni2ed or inadequately controUed ha2ards (see Hazard analysis and risk assessment) is required by OSHA (36). The principal methods of analysis, in an approximate ascending order of intensity, are what-if checklist failure modes and effects ha2ard and operabiHty (HAZOP) and fault-tree analysis. Other complementary methods include human error prediction and cost/benefit analysis. The HAZOP method is the most popular as of 1995 because it can be used to identify ha2ards, pinpoint their causes and consequences, and disclose the need for protective systems. Fault-tree analysis is the method to be used if a quantitative evaluation of operational safety is needed to justify the implementation of process improvements. 

Banks, W., Wells, J. E. (1992). A Probabilistic Risk Assessment Using Human Reliability Analysis Methods. In Proceedings of the International Conference on Hazard Identification and Risk Analysis, Human Factors, and Human Reliability in Process Safety. New York American Institute of Chemical Engineers, CCPS. 

CCPS, Layer of Protection Analysis Simplified Process Risk Assessment, D. A. Crowl, ed. (New York Center for Chemical Process Safety, AICHE, 2001) (in press). 

In 1993, the Center for Chemical Process Safety (CCPS) published Guidelines for Safe Automation of Chemical Processes (referred to henceforth as Safe Automation). Safe Automation provides guidelines for the application of automation systems used to control and shut down chemical and petrochemical processes. The popularity of one of the hazard and risk analysis methods presented in Safe Automation led to the publication of the 2001 Concept Series book from CCPS, Layer of Protection Analysis A Simplified Risk Assessment Approach. This method builds upon traditional process hazards analysis techniques. It uses a semiquantitative approach to define the required performance for each identified protective system. 

Risk assessment studies can be performed using whatever process information is available (CCPS 1992a). Obviously, the more information and knowledge that is available, the more thorough and valuable the risk study can be. For facilities that must meet regulatory requirements for process hazard analyses, certain process safety information (PSI) is required to be compiled and up to date before starting the analysis. 

RMP requires covered processes to have a hazard assessment, a prevention program, and an emergency response program. The hazard assessment must evaluate the accidental release of regulated substances, including the worst case scenario. RMP contains requirements for prevention of accidental releases, which include the same basic elements as the OSHA PSM Standard. Therefore, the limitations described in Section 5.1.2.2 with respect to process safety information and process hazard analysis also apply to RMP. 

Gather the requirements for the systems including functional (e.g. operational checks) requirements, nonfunctional (e.g., coding standards) requirements, users, company-wide regulatory compliance (e.g., Part 11 technical control), safety, process, and other applicable requirements Characterize information, assess its value to the organization, and incorporate information quality as part of the project plan Conduct a system (hardware, software, and process) risk analysis. New requirements may be found as the result of the risk analysis. Any new requirements must be documented in the requirements specification deliverable... 

Identifying the potential hazards (PHA, process hazard analysis, or HAZOP, hazard and operability analysis) during operation must be done from a wide-angle approach dangerous situations can occur due to many root-cause situations other than those specified by, for instance, ASME or PED. Based on the results of the risk assessment, the pressure equipment can be correctly designed and the most effective safety system selected. 

Center for Chemical Process Safety. 2001. Layer of protection analysis—Simplified process risk assessment. New York American Institute of Chemical Engineers. 

Risk management. A part of chemical process safety management. Risk analysis (often used interchangeably with risk assessment) is a part of risk management. 

Burk, A., Principal Safety Consultant. Du Pont, Newark. DE, presentation on Process Hazards Analysis and Quantitative Risk Assessment (July 20, 1989). 

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