Hazop study
Satish H. Kashid / Jayant G. Patil
HAZOP (HAZARD AND OPERABILITY) STUDIES FOR DESIGN OF ENGINEERING SYSTEMS
Authors
Satish H. Kashid
Jayant G. Patil
ABSTRACT
The design of engineering piping systems onboard war ships is an extremely complex activity with pipes of various systems running neck to neck through machinery spaces, compartments and decks etc. For validating the design, usually a careful thought process and intuitive imagination is needed to predict the abnormal causes and adverse consequences of all possible deviations from normal operation. A more effective way of doing this is by using HAZOP study method. The HAZOP study is helped along by “guide words” to cover all possible malfunctions in the system in a systematic way. This paper offers an overview of HAZOP formulation procedures and how effectively it can be put to use while validating engineering system (P&I) drawings designed for warships.
INTRODUCTION
Piping is an important element of every stage of project design, purchasing and construction. Piping systems are comparable to the veins and arteries through which fluids, vapours, slurries, solids etc flow under varying conditions. Piping networks onboard warships are subjected to the severest conditions of their process/system such as high pressure, temperature, flow and a combination of all these. In addition to the above, corrosion, erosion and toxic conditions add to the problems and difficulties in piping systems design. For warships, an additional problem is proper routing of pipes so that interference between different system pipes in the compartments and through the decks doesn’t arise. Moreover, the piping systems are to be supported in a way that vibrations, noise due to ship’s rolling and pitching do not get propagated to such an extent, so as to cause undue stresses on the piping systems
While all such designing and piping layout is being done for the ship systems, they are always subject to or prone to
HAZOP (HAZARD AND OPERABILITY) STUDIES FOR DESIGN OF ENGINEERING SYSTEMS
Authors
Satish H. Kashid
Jayant G. Patil
ABSTRACT
The design of engineering piping systems onboard war ships is an extremely complex activity with pipes of various systems running neck to neck through machinery spaces, compartments and decks etc. For validating the design, usually a careful thought process and intuitive imagination is needed to predict the abnormal causes and adverse consequences of all possible deviations from normal operation. A more effective way of doing this is by using HAZOP study method. The HAZOP study is helped along by “guide words” to cover all possible malfunctions in the system in a systematic way. This paper offers an overview of HAZOP formulation procedures and how effectively it can be put to use while validating engineering system (P&I) drawings designed for warships.
INTRODUCTION
Piping is an important element of every stage of project design, purchasing and construction. Piping systems are comparable to the veins and arteries through which fluids, vapours, slurries, solids etc flow under varying conditions. Piping networks onboard warships are subjected to the severest conditions of their process/system such as high pressure, temperature, flow and a combination of all these. In addition to the above, corrosion, erosion and toxic conditions add to the problems and difficulties in piping systems design. For warships, an additional problem is proper routing of pipes so that interference between different system pipes in the compartments and through the decks doesn’t arise. Moreover, the piping systems are to be supported in a way that vibrations, noise due to ship’s rolling and pitching do not get propagated to such an extent, so as to cause undue stresses on the piping systems
While all such designing and piping layout is being done for the ship systems, they are always subject to or prone to
References: 1. LRS rules for Special Service Craft (2011 edition) 2. Venkatasubramanian, V. and Vaidhyanathan, R., A knowledge based framework for automating HAZOP analysis. AIChE Journal, 1994, 40(3), 496 - 550. 3. Parmar, J. C. and Less, F. P., The propagation of faults in process plants: hazard identification. Reliability Engineering, 1987, 17,277-302. [24] Parmar, J. C 4. Requirements and Guidance for the Procurement of Pumps for Auxiliary System Def Stan 02-327/Issue 11 April 2000 5. Requirements for the Design and Installation of Fuel Systems for Gas Turbine Engines and Diesel Engines in HM Surface Ships and Submarines: Defence Standard 02-320 Issue 2 Publication Date 8 February 2002. 6. Oil and Bilge Water Shipboard Processing Arrangements: Defence Standard 02-322 Issue 2 Publication Date 02 December 2002 7. Seawater systems for HM Surface ships: Naval Engineering standard 719/Issue 02/Oct 1981.