Chemical Engineering March 2019 - 41

Cover Story
ent 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 in a different
way, meaning that the corrosion risk to
the inside of the process equipment is
varying continuously.
For plant operators, corrosiveness has to
be viewed as another process variable - it
has to be measured and managed. However,
in the past, there was little instrumentation
available to characterize it and measure
the impact that the corrosiveness of the
process fluids has on process equipment.
Fortunately, this situation is improving with
the advent of more advanced corrosionmonitoring
technologies, including
wireless systems.
A very complex characteristic
The interaction of chemicals and metals
has been studied extensively, and the
mechanisms of metal loss and weakening
are very complex. Countless articles and
books have been written on the topic,
but for this discussion, and to most operators
in the real world, the question is
straightforward: Is this process fluid eating
away at my plant's pipe walls, and if so, at
what rate?
FIGURE 2. Non-intrusive wireless
sensors monitor pipe wall
thickness in real time and
send data to the plant automation
system via a wireless
mesh network
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Chemical Engineering March 2019

Table of Contents for the Digital Edition of Chemical Engineering March 2019

Contents
Chemical Engineering March 2019 - Cover1
Chemical Engineering March 2019 - Cover2
Chemical Engineering March 2019 - Contents
Chemical Engineering March 2019 - 2
Chemical Engineering March 2019 - 3
Chemical Engineering March 2019 - 4
Chemical Engineering March 2019 - 5
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Chemical Engineering March 2019 - 7
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Chemical Engineering March 2019 - Cover3
Chemical Engineering March 2019 - Cover4
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