Chapter 25. Changes to Processes and Plants

Midas, a legendary king of Phrygia, asked the gods to make everything he touched turn into gold. His request was granted, but as his food turned into gold the moment he touched it, he had to ask the gods to take back their favor.Unfortunately, the gods are less obliging today and will not reverse the results of ill-considered modifications.

It is now many years since the explosion at Flixborough in 1974 (see Section 2.4) brought home to the process industries the need to look systematically for possible consequences before making any change to plants or processes. Many publications [1–3] have described accidents that occurred because no one foresaw the results of such changes and suggested procedures ...

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