CHERNE Test-Ball - Page 29

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PLACING PLUG THROUGH RESTRICTED ACCESS. When plug
placement requires installation through a restricted access, air may be
forced from the plug to provide a minimum cross section. The ination
valve core or ination tting may be temporarily removed to aid deation.
The valve core or ination tting must be properly replaced and leak free
(using pipe sealant or teon tape), and the tting’s protective cap must
be replaced. The plug body may be temporarily lashed with a rope to
provide the minimum possible cross section for placement. The lashed
plug is inserted into the pipe, the plug body is then untied, and the plug is
properly positioned and then inated normally. Use caution as the restricted
access may cause the plug to be signicantly more difcult to remove than
to install. A vacuum pump may be used to extract air from larger pipeline
plugs. Vacuum pump use may require fabrication of special ination
extension hose assemblies. Consult with a registered professional engineer
for the design and construction of such assemblies.
BENDING FLEXIBLE PLUGS.
If installation requires a exible plug to be
bent to reach proper position, temporary removal of the ination valve core
or ination tting will make the bending process easier. The valve core,
ination tting and the tting’s protective cap must be properly replaced and
be leak free (using pipe sealant or teon tape).
NOTE: To prevent damage to, or collapse of, the bypass hose assembly
of a exible Muni-Ball ® plug, DO NOT bend the plug body in excess of 90
degrees or attempt to exceed the maximum allowable bend radius of the
bypass hose.
THE INFLATOR
MAY BE REMOVED
TEMPORARILY TO
AID IN BENDING
FLEXIBLE PLUGS.
USE PIPE SEALANT
OR TEFLON TAPE
WHEN REPLACING.
BENDING
FLEXIBLE PLUGS