Chemical Engineering September 2020 - 51

the plastic face shields) change, but
the facility may also undergo structural
changes to comply with the
requirement to maintain a dust-free
manufacturing environment.
One of the main hazards associated
with converting production to
plastic face shields, from either a
less hazardous process or a process
posing a different risk, is the storage
of Group A plastics. This type of
plastic is classified by having a higher
heat of combustion and a higher
burning rate than other plastics and
includes materials such as polyethylene
terephthalate (PET), natural
rubber, polypropylene, acrylic and
polyvinyl chloride (PVC). These plastics
can be especially hazardous in a
fire because they ignite quickly and
easily but also burn incredibly hot.
Protection for storage of this classification
of plastics is generally much
more stringent compared to storage
requirements for other items.
A few key questions to answer
while considering the storage of
non-native materials in your facility
are as follows:
* Where is the hazardous material
being stored?
* What is the proper container for
storage of this material?
* How much will be stored?
* If a large quantity will be stored,
how will it be stored? Will racks
or shelving be used? What else
might be stored nearby or within
the same racking?
* Do the building materials and construction
of this facility support this
type of storage?
Again, it is important to consider
retaining the services of a fire- and
life-safety professional when making
changes to your facility.
Process risks to the facility
When a chemical process is being
developed, it is expected that a hazard
and operability study (HAZOP),
hazard identification study (HAZID),
or another method of " what-if " analysis
will take place before and durFigure
2. Fire protection systems in facilities that
have changed production to hand sanitizer, which
has a high alcohol content, may not be capable of
adequately protecting the increased hazard that
comes from storing large quantities of flammable
liquids
ing the development. This type of
study often starts small, by breaking
the process down by each piece of
equipment and imagining worstcase
scenarios, in order to prevent
or plan for them. The study then,
effectively, " zooms out " further and
further, until the entire process is
viewed and analyzed. This exercise
is very effective in preventing everything
from everyday problems to catChemiCal
engineering www.Chemengonline.Com September 2020
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51

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Chemical Engineering September 2020

Table of Contents for the Digital Edition of Chemical Engineering September 2020

Contents
Chemical Engineering September 2020 - Cover1
Chemical Engineering September 2020 - Cover2
Chemical Engineering September 2020 - Contents
Chemical Engineering September 2020 - 2
Chemical Engineering September 2020 - 3
Chemical Engineering September 2020 - 4
Chemical Engineering September 2020 - 5
Chemical Engineering September 2020 - 6
Chemical Engineering September 2020 - 7
Chemical Engineering September 2020 - 8
Chemical Engineering September 2020 - 9
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Chemical Engineering September 2020 - Cover3
Chemical Engineering September 2020 - Cover4
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