CHERNE Test-Ball - Operational Safety and Support; Backup System and Bracing Requirements

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11. PROVIDE A BACKUP SYSTEM FOR SAFETY.
NEVER RELY ON PIPELINE PLUGS AS THE ONLY MEANS TO PREVENT INJURY
OR PROPERTY DAMAGE. NEVER ENTER THE DANGER ZONE DURING USE.
WATER
WATER
WATER
DANGER
ZONE
DANGER
ZONE
ZONE
DANGER
ZONE
DANGER
NEVER RELY ON THE USE OF PIPELINE PLUGS TO
PREVENT INJURY OR PROPERTY DAMAGE.
ALWAYS PROVIDE A BACKUP SYSTEM!
CONSULT A REGISTERED ENGINEER
ON BRACING CONSTRUCTION
PLUGS MAY
BE BRACED
TO PREVENT
DISLODGEMENT
ADDITIONAL PLUGS MAY BE PLACED
UPSTREAM TO PREVENT LEAKAGE
NEVER ENTER THE DANGER ZONE!
THE DANGER ZONE EXISTS IN FRONT
OF THE PLUGGED PIPE OPENING IN AN AREA
WHICH EXPANDS OUTWARDLY IN
A CONE SHAPE.
BRACING
CD
CD
BRACING
WARNING NEVER ATTEMPT TO USE THE EYE BOLTS,
INFLATION HOSE, OR CARRYING HANDLE OF A PNEUMATIC PLUG AS
A SAFETY TETHER OR AS A MEANS TO RESTRAIN THE PLUG IF IT IS
DEFLATED WHILE HOLDING BACK PRESSURE! Safety bracing properly
designed and constructed to withstand the tremendous forces involved is
required. Eye bolts and carrying handles on most Cherne pneumatic plugs are
designed only for carrying, lifting and lowering pneumatic plugs. They are NOT
designed to withstand the large forces encountered when plugs are deated when
restraining back pressure. The carrying handles, eye bolts or their attachment to
the pneumatic plug may fail, thereby damaging the plug itself and may result in
unsafe conditions. THIS MAY CAUSE PLUG FAILURE WHICH MAY RESULT IN
DEATH, SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE!
DANGER A FULLY OPERATIONAL BACKUP SYSTEM MUST
BE USED IF THE PLUG IS USED IN ANY ENVIRONMENT WHERE PLUG
LEAKAGE, FAILURE OR DISLODGEMENT FOR ANY REASON, COULD
RESULT IN LIFE ENDANGERMENT, BODILY INJURY OR PROPERTY
DAMAGE! The backup system must be designed to safely stop a dislodged plug
and the pipeline media that will discharge upon plug failure. Consult a registered
professional engineer for proper construction and maintenance of such a system.
FAILURE TO PROVIDE A BACKUP SYSTEM MAY RESULT IN DEATH,
SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE!