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ISOJOINT
IsoJoint
is a true monolithic isolating joint. The most up-to-date, patented
joint on the market, IsoJoint
does not depend on the use of isolating sleeves and washers for
bolts nor isolating gaskets or O-rings between flanges. Why? These
isolating gasket kits require a critical, even surface to provide
regular and variable crushing and must be maintained over the life
of the insulator. External pressure, causing an uneven load on the
flange area, can result in loss of isolating properties as well
as the transported fluid.
IsoJoint
employs one or more, preassembled pressure seals and the
isolating rings. Unlike isolating gasket kits, IsoJoint
does not depend on installer's actual fitting of the joint's isolating
gasket, sleeves and washers and the possible loss or damage to any
one of the number of these materials which would result in complete
breakdown of the isolated flange. One lost or damaged part will
render these flanges useless. The monobloc design of the IsoJoint
allows the joint to be welded into place as one piece, virtually
eliminating any field problems. Unless a meticulous on-site assembly
and over-wrapping is undertaken in the installation of the isolating
gasket kits, gradual penetration of moisture will erode the electrical
resistance. This problem, along with the others listed above, make
inspection and maintenance necessary. Contrary to this inconvenience, IsoJoint's technique
and design of the pressure seals, coupled with the closure weld,
guarantees that the specified mechanical and electrical properties
will always be maintained allowing for direct burial and requiring
no maintenance.
At
first glance, flange gasket kits seem to be the economical route
to take to the isolating problem, but when coupled with the expense
of components, labor and maintenance, IsoJoint
has proven itself to be the productive solution. The IsoJoint
provides for current control by separating pipework into distinct
zones as part of a cathodic protection system and effectively eliminating
long-line currents. This assures increased plant and equipment life
by reducing or eliminating corrosion damage. Effective control can
be realized by placing IsoJoints
at pipeline entry points to processing plants or gas compressor
stations, where a branch is connected to the mainline, where two
pipelines of different material connect to where well coated pipe
meets a poorly coated system. Optimum cathodic protection can be
achieved for each section of pipeline—maximizing savings and
minimizing costs.
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