| longname |
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{longname} Q700. During the drum cooling process, off-gases from the delayed coking unit drums are sent to a blowdown system and the uncondensables are vented to a flare. When using Equation Y-3, should this be considered a startup, shutdown, or malfunction (SSM) event since the drum is being taken out of service? {longname} |
A700.
...
The
...
SSM
...
flow
...
portion
...
of
...
Equation
...
Y-3
...
was
...
intended
...
to
...
cover
...
unusual
...
events
...
associated
...
with
...
the
...
startup,
...
shutdown,
...
or
...
malfunction
...
(SSM)
...
of
...
a
...
unit.
...
We
...
did
...
not
...
intend
...
for
...
this
...
term
...
to
...
include
...
routine
...
gases
...
that
...
are
...
sent
...
to
...
the
...
flare
...
on
...
a
...
daily
...
or
...
otherwise
...
frequent
...
basis
...
due
...
to
...
the
...
cyclic
...
operation
...
of
...
a
...
delayed
...
coking
...
unit
...
or
...
catalytic
...
reforming
...
unit.
...
We
...
do
...
not
...
consider
...
delayed
...
coking
...
drum
...
cycling
...
or
...
cyclic
...
catalytic
...
reforming
...
unit
...
regeneration
...
operations
...
to
...
be
...
shutdown
...
events
...
as
...
the
...
process
...
unit
...
remains
...
in
...
operation.
...
These
...
routine
...
purges
...
that
...
may
...
be
...
sent
...
to
...
the
...
flare
...
should
...
be
...
accounted
...
for
...
in
...
the
...
“normal” flare
...
flow
...
term
...
(Flare
...
Norm)
...
within
...
Equation
...
Y-3,
...
regardless
...
of
...
the
...
quantity
...
of
...
gas
...
purged
...
per
...
day.
...
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{info}
Source: A. McKittrick, 11/27/2012 (Subpart Y_Flare SSM FAQ_final_2.docx)
Approval / Publishing History: Version 1
Expiration: none
Relevant Subparts: Subpart Y
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