HAZOP studies are widely accepted in chemical and petroleum industries as the method for conducting process hazard analysis related to design, maintenance and operation of the systems. In this paper, a HAZOP reasoning method based on function-oriented modelling, multilevel flow modelling (MFM) is extended with function roles to complete HAZOP studies in principle. A graphical MFM editor, which ...

HAZOP studies are widely accepted in chemical and petroleum industries as the method for conducting process hazard analysis related to design, maintenance and operation of the systems. Different tools have been developed to automate HAZOP studies. In this paper, a HAZOP reasoning method based on function-oriented modeling, Multilevel Flow Modeling (MFM), is extended with function roles. A graph...

This paper describes the work done by SINTEF on HazOp on a safety critical, software intensive system and the lessons learned in the process. The lessons concern two areas – the HazOp process and the use of the HazOp to formulate lower level safety requirements. We describe a HazOp process based on system functions instead of the overall system functionality and how to use software related guid...

Safety is an important issue in process design and operation in the chemical process industry (CPI). It is even more critical for modern chemical manufacturing processes, which are either operated under extreme conditions to achieve maximum economic profit, or are highly flexible. The importance of safety analysis in process operation is well recognized after occurrence of several tragic accide...

Hazard and operability (HAZOP) methodology is a Process Hazard Analysis (PHA) technique used worldwide for studying not only the hazards of a system, but also its operability problems, by exploring the effects of any deviations from design conditions. Our paper is the HAZOP review intended to gather HAZOP-related literature from books, guidelines, standards, major journals, and conference proce...

This report proposes the use of a safety technique known as HAZOP (Hazard and Operability Studies) to rigorously generate mutation operators for Java. A set of Java mutation operators is proposed by applying HAZOP to the Java syntax definition and is compared to the operator sets of current mutation systems. Hypothesised flaws, which are also obtained by HAZOP application to Java language const...

This paper presents a functional approach to HAZOP studies in which the plant is divided along strictly functional lines starting from the purpose of the plant and continuing down to the function of a single node, e.g. a pipe section. The approach leads to nodes with simple functions such as liquid transport, gas transport, liquid storage, gas-liquid contacting etc. From the functions of the no...

The paper deals with risk analysis and management in the realisation of process plants by engineering and contracting companies. Specifically, a new analytical methodology is developed to manage the typical risks of plant commissioning. Following a detailed study of the commissioning process and its criticalities, Hazop is selected as the most suitable approach in forecasting particular risks o...

HAZOP is a powerful hazard analysis technique which has a long history in process industries. As the use of programmable electronic systems becomes more common, it is clear that there is a need for a HAZOP method which can be used effectively with such systems. This paper describes several attempts to derive such a process, and identifies some requirements which must be met by any PES HAZOP pro...

HAZOP (Hazard and Operability) is a preliminary and systematic approach for identifying hazards and suggesting hazard mitigation measures in a process facility. A knowledge-based expert system, ExpHAZOP, has been developed to automate the manual HAZOP analysis and accelerate the process. ExpHAZOP is comprised of a graphical user interface (GUI), a knowledge-base and an inference engine. One of ...