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CDOIF
Chemical and Downstream Oil
Industries Forum
CDOIF is a collaborative venture formed to agree strategic areas for
joint industry / trade union / regulator action aimed at delivering
health, safety and environmental improvements with cross-sector
benefits.
3.10 Point or interface detection at tank water draw valve outlet
Usage
Potential benefits Considerations
Indicative
Cost
Leak detection installed on the
outflow from a water drain valve
can provide indication of loss of
containment into the bund.
Early detection of hydrocarbons in
the bund may be used to reduce
the risk of pool fires.
Cost effective when
installed in drain lines
from the outlet of the
Tank water draw is
normally an attended
operation, but can take
place over long periods
of time. In these
instances, hydrocarbon
detection may be of
benefit.
Close care and attention
is needed during the
set-up and
commissioning of such
systems to prevent
spurious alarms and
avoid loss of confidence.
Detection in the water
drain line would form
part of a mitigatory
Low
Early detection of hydrocarbons in
the bund may also provide an
early indication of loss of
containment, reducing the risk of
a Major Accident to the
Environment (MATTE)
drain valves
protection layer – alarm
activation would be
required to initiate
further action and/or
emergency response.
This further activity
would be required to be
clearly defined and
subject to period testing.
Hydrocarbon detection
may be linked with
executive action (for
example closing an
automated valve) if
failure is likely to result
in hydrocarbon release
into the bund
Guideline – Leak Detection v0.6
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