Hazop Analysis

Fault Classification
Distinguishing different types of faults is an important process in determining the logical structure of a fault tree, as well as parts or elements that argon often likely to cause a clay failure. The following classifications fox been widely used in Fault Tree analysiss (FTA).
a) Primary, petty(a), and command faults. A primary fault happens in an environment or under a loading where the component is qualified. A secondary fault occurs in an environment or under a loading for the component not qualified. For instance, if a transmission shaft fails under a loading which is higher(prenominal) than the design loading capacity, the shaft has a secondary fault. substitute(prenominal) faults occur randomly, but usually, they start constant failure rates. A command fault leads to a primary or secondary fault when a component operates correctly under a command, but this command is given at a misemploy time or situation. For example, if an erroneous command causes a valve to establish and release reactants before a process is done, the valve will have a command fault.
b) Passive and active faults. Components of a system operate in either a static or dynamic manner, so components do-nothing be classified as peaceful or active components, accordingly.



Components such as bolts, pipes, and reactors atomic number 18 passive components, while valves, switches and motors are active components. A passive component may be considered as a communicate mechanism between active components. Faults occurring on passive components are considered as passive faults, while those occurring on active components are defined as active faults. Usually, the active components have much higher failure rates, typically two or cardinal orders of magnitude higher than the passive components.

HAZOP/HAZAN Overview
These techniques provide a way to avoid and prepare for accidents. A facilitys safety is important for many reasons. A plant can save money, lives and time by providing a safe environment. This is assertable by...If you want to get a full essay, order it on our website: Ordercustompaper.com



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