API PUBL 2557-1993

$39.00

Vapor collection and control options storage and transfer operations in the petroleum industry

Published By	Publication Date	Number of Pages
API	1993	36

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Description

1.1 Scope

Vapor collection and control, as it is discussed in this publication,
includes the collection and treatment of volatile hydrocarbon vapors
emitted during the storage and transfer of petroleum products and
during loading operations. Passive vapor controls, which also can be
effective at reducing emissions, are not covered in this publication.
During loading operations, vapors from petroleum liquid will evaporate
to reach equilibrium at ambient conditions to the degree allowed by
the vapors' inherent vapor pressure. For example, vapors expelled
while a rail car or truck is being filled with gasoline result from
the exposure of hydrocarbon vapors to air and evaporation during
transfer. Agitation of liquids and heating could cause additional
vapor emissions during transfer operations. Vapor control devices
collect emitted vapors and recover (for example, through
refrigeration, absorption, or adsorption) or destroy (for example, by
thermal or catalytic oxidation) them to prevent hydrocarbon vapors
from releasing to the environment.