2
• Never try to open a TDW closure
while the vessel is under pressure.
• Never force the clamp ring operating
mechanism if the clamp ring does not
operate freely.
Although it may be necessary to force the door
open or closed, the clamp ring should always
operate freely. Do not force the clamp ring
operating mechanism or use a "cheater" pipe on the
handle of a lever-operated clamp ring. Damage to
components may result. Damaged components
could prevent the clamp ring from closing fully.
If excessive force has been used on the clamp ring
operating mechanism, the component attachment
welds should be visually inspected for damage
and/or examined by any common NDT method.
The closure door face must always be parallel to
and concentric with the face of the barrel collar. If
a TDW closure does not operate freely and easily
following routine maintenance and adjustment, and
the door face is not parallel to and concentric with
the barrel collar face, contact the TDW factory for
assistance and repair, as necessary.
Do not allow anyone to operate a TDW closure
who is not fully trained in the procedures contained
in the printed operating instructions, and who is
not fully aware of the potential hazards created by
liquids or gases under pressure.
Should any questions or difficulties arise at any
time in the use of TDW clamp ring closures, please
contact TDW immediately.
3.2 WARNINGS and CAUTIONS
The purpose of WARNINGS and CAUTIONS in
this manual is to call the operator's attention to
the possible danger of injury to personnel and
equipment. All warnings and cautions deserve
careful attention and understanding.
A. WARNING: Indicates a potentially
hazardous situation that, if not avoided, could
result in death or serious injury and damage
to equipment.
B. CAUTION: Indicates a potentially hazardous
situation that, if not avoided, could result in
minor to moderate injury and damage to
equipment. A CAUTION may also be used to
warn operators about unsafe practices.
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