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Comment PDF IIOT Oil & Gas

Using Corrosion as a Process Variable

By Jake Davies, Emerson Automation Solutions |

Monitoring and analyzing historical corrosion data can provide insights not available from manual inspection and measurement techniques Some petroleum refiners looking for ways to improve profitability have lately turned to buying opportunity crudes from secondary sources. These crudes, while priced less than more premium feedstocks, often contain various contaminants, including solids and corrosive compounds. Such contaminants can damage processing equipment by corroding and eroding it from the inside out (Figure 1). In the worst case, a pipe wall may become progressively thinner over time until the pressure causes it to break open — hot hydrocarbons that are perhaps higher than the auto-ignition temperature can escape and mix with air, resulting in a potentially serious safety and environmental incident. FIGURE 1. Unique corrosion issues can arise when petroleum refiners swap feedstocks[/caption] This is an extreme case, but not without precedent in the global petroleum refining industry. Opportunity crudes present unique challenges and they often have vastly different characteristics than the crudes many petroleum refineries are designed to handle. The feedstock may be more or less corrosive than the last batch, or corrosive…
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