CHERNE Test-Ball - Page 37

37
B. RELEASE THE AIR IN THE PNEUMATIC PLUG from outside the
Danger Zone through the ination extension hose until the plug is
completely deated. Full plug deation minimizes possibility of plug
damage during the removal process.
NOTE: A vacuum pump may be used to speed the deation of larger plugs.
The suction hose of a water pump may be needed to aid deation of any
plug inated with water. These deation aids may require fabrication of
special ination extension hose assemblies. Consult with a registered
professional engineer for the design and construction of such assemblies.
C. REMOVE THE PLUG FROM THE PIPE.
Fully deate small plugs and
simply pull on the attached chain and ring assembly to remove the plug.
Fully deate larger plugs and pull on the attached Poly-Lift Line or tether
device to remove the plug. If unexpected resistance is encountered, stop
pulling and carefully inspect the plug installation. Prevent damage to the
plug and/or accessories by eliminating any obstructions before proceeding.
WATER
WATER
ZONE
DANGER
ZONE
DANGER
THE BY-PASS ON A
MUNI-BALL® PLUG MAY
BE USED TO RELIEVE
BACK PRESSURE BY
GRAVITY OR PUMPING
A SMALL PLUG CAN
BLOCK A MUNI-BALL®
PLUG BY-PASS
DEFLATE THE SMALL
PLUG TO RELIEVE
BACK PRESSURE
WARNING DO NOT ATTEMPT TO USE AN EXTENSION HOSE
AS A LIFTING OR CARRYING HANDLE OR AS A TETHER TO REMOVE
THE PLUG FROM THE PIPELINE! This may weaken or damage the
ination line or the plug itself and result in a damaged or unsafe plug. THE
DAMAGED PLUG MAY LATER FAIL WHICH MAY RESULT IN DEATH,
SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE!
WARNING DEFLATING A PNEUMATIC PLUG BEFORE
ALL BACK PRESSURE IS RELEASED MAY CAUSE THE PLUG AND
THE MEDIA RESTRAINED TO EJECT FROM THE PIPE AT HIGH
VELOCITY! THIS MAY RESULT IN DEATH, SERIOUS BODILY INJURY
AND/OR PROPERTY DAMAGE AND DAMAGE TO THE PLUG AND
ACCESSORIES!