Rs Sedha Applied Electronics Pdf Free 77
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Because the petroleum refining industry relies on owners of refineries engaging in their own data gathering, it is possible that refinery accident and incident data may be excluded, under-reported, or skewed. Additionally, data are often taken at the "hard" of judgment (duty station managers, human resource managers, etc.) rather than the "soft" of judgment (safety inspector, engineer, etc.). In the US, the most important data records are called “Hazardous Production Facility Reports” (or HPFRs), and many of these data records are considered by some to be under-represented, and some doubt about their accuracy.[4][5][6][7]
Processes can be thought of as separate units that are performed every day, but they are not necessarily performed every day. A refinery will have processes ranging from "day in and day out" to "occasionally used". Most refineries will keep some oil refining processes that are close to "day in and day out" in production and can easily "run out of process capacity" if there is a problem. Some "day in and day out" processes are very sensitive to a lack of process capacity, and a refinery's ability to maintain safety and efficiency of handling operations with a lack of process capacity can be all-important. These include the processes of crude storage and crude fractionation, as well as the hydrotreating and hydrocracking steps that occur during coking operations.
Some hydrocarbon types are more difficult to refine than others. If a refinery's processes are poorer at handling a difficult type of crude such as natural gas liquids, extra measures such as more distillation units, better catalytic cracking processes, higher pressures, and more acid gas removal will be required. Likewise if a refinery lacks the experience with crude oils with a hard to refine make-up, it may be necessary to retrain or change "work-around" processes or to design a different refinery.
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