HPCL CPM 3-PCP 5-Risk Anaylsis & Hazop Studies- PPT.pptx

Discover what deviation from the design intention can

This preview shows page 68 - 75 out of 217 pages.

Discover what deviation from the “design intention ” can occur What may the causes and consequences of these deviations This is done systematically So suitable guide words to be used
Image of page 68

Subscribe to view the full document.

Hazop Study Hazard and Operability Studies (HAZOP) have been used for many years as a formal means for the review of chemical process designs. A HAZOP study is a systematic search for hazards which are defined as deviations within these parameters that may have dangerous consequences. In the process industry, these deviations concern process parameters such as flow, temperature, pressure etc. Deviations are the hazardous conditions Or/And operability aspects In fact operability issues / efficiencies could be higher
Image of page 69
Hazop – Important Features Design Intent Deviations from the intent Cause of the deviations Consequence Hazard Operating difficulties Design intent & Entities examined: Material Activity Equipment Source / destination
Image of page 70

Subscribe to view the full document.

Guide Words Meanings NO or NOT MORE LESS AS WELL AS PART OF REVERSE OTHER THAN Negation of Intention Quantitative Increase Quantitative Decrease Qualitative Increase Qualitative Decrease Logical opposite of Intention Complete substitution Guide Words
Image of page 71
Guide Words Guide Words Deviations NONE No forward flow ie no flow/reverse flow MORE OF More of any relevant physical property than there should be.. LESS OF Less of any relevant physical property than there should be PART OF Composition of system different from what it should be MORE THAN More components present than there should be OTHER THAN What else can happen apart from normal operations – start up, shut down, failure of plant services , maintenance
Image of page 72

Subscribe to view the full document.

Hazop – Advantages The advantage of Hazop Approach is that it provides a more complete identification of the hazards , including information on how hazards can develop as a result of operating procedures, operations upsets , lack of inspection , inadequate maintenance. It can be carried out during design , operations or whenever there is add on , modifications , changes It clears the mind , bring awareness , gives confidence Complex processes are examined systematically without confusion After MBLR no of recommendations incorporated which are HAZOP based..
Image of page 73
Hazop – Disadvantages This approach provides little information on risk and consequences in Quantitative Manner The approach may tend to Gold Plate a process design resulting in a large number of Hazards being identified So it cost effectiveness to be kept in view of the recommendations Many of the Hazards may have low probability or consequence . However with some experience , the method can be effective The HAZOP study technique is not substitute of good design.
Image of page 74

Subscribe to view the full document.

Image of page 75
  • Fall '19
  • Safety engineering, fault tree, Hazards

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern