Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Inherent Safety Tradeoffs

In many cases, the inherent safety advantages of one process are clear when compared with alternatives. One or more hazards may be significantly reduced, while others are unaffected or only marginally increased. For example, aqueous latex paints are clearly inherently safer than solvent based paints, although there are applications where the increased performance of solvent based paints justifies their use, with the appropriate layers of protection. [Pg.17]

Unfortunately, many times it is not clear which of several process alternatives is inherently safer. Because nearly all chemical processes have a number of hazards associated with them, an alternative which reduces one hazard may increase a different hazard. For example, process A uses flammable materials of low toxicity process B uses noncombustible materials, which are volatile and moderately toxic, and process C uses noncombustible and nontoxic materials but operates at high pressure. Which process is inherently safer The answer to this question will depend on the specific details of the [Pg.17]

The hazards associated with normal plant operations, such as normal stack emissions and fugitive emissions, as well as those resulting from specific incidents such as spills, leaks, fires and explosions should be considered. [Pg.18]

It is also necessary to consider business and economic factors in making a process selection. These include  [Pg.18]

Design strategies which result in an inherently safer design may also tend to improve process economics. For example, minimizing the size of equipment or simplifying a process by eliminating equipment will usually reduce capital investment and reduce operating costs. However, overall process economics are very complex and are impacted by many factors, and it may not always be true that an inherently safer process is also economically more attractive. [Pg.18]


McQuaid (1991), CCPS (1993a), and Hendershot (1995a) review a number of specific examples of inherent safety tradeoffs. These include ... [Pg.19]

Containment buildings are an example of inherent safety conflicts and tradeoffs. A containment building provides protection outside the building, but it can also trap and concentrate material from small leaks inside the building, increasing the risk to personnel entering the building. [Pg.48]

In the process industries, the replacement of HF with sulfuric acid (H2SO4) that was discussed above is considered be a fine example of the application of inherent safety. However, there are tradeoffs. H2SO4 is less efficient as a catalyst in the alkylation process hence, there have to be more truck movements to bring the material on site and to remove the spent acid. These additional tmck movements create an increased likelihood of a vehicle accident leading to a spill in a populated area. Unintended consequences can fall into one of three general categories. [Pg.404]


See other pages where Inherent Safety Tradeoffs is mentioned: [Pg.17]    [Pg.17]    [Pg.19]    [Pg.18]    [Pg.18]    [Pg.20]    [Pg.17]    [Pg.17]    [Pg.19]    [Pg.18]    [Pg.18]    [Pg.20]    [Pg.58]    [Pg.22]    [Pg.678]    [Pg.5]    [Pg.122]    [Pg.7]    [Pg.327]    [Pg.82]   


SEARCH



Inherent

Inherent safety

© 2024 chempedia.info