PART 3
EXECUTION
3.1
INSTALLATION
3.1.1
Anode Installation
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NOTE: Proprietary systems of anode installations
are available for areas where icing is expected.
For such areas paragraph entitled "Icing Climates"
below should be included.
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[IEEE C2] [NFPA 70].
[3.1.1.1
Icing Climates
Suspend anodes in a manner similar to that in non-icing climates, except
provisions shall be made to prevent the anodes and suspending cables from
being damaged by freezing or falling ice. Contractor shall certify that
the method has been used successfully for similar applications.
]3.1.1.2
Anode Placement
Arrange anodes in the tank [and riser pipe] as shown in the drawings [so
that protection can be provided to surfaces without exceeding potentials
[in the vicinity of the anodes] that will be detrimental to coatings].
Suspend anodes from roof [plate] [structurals] by means of
factory-installed connecting wire designed to support the anodes in air
[before submergence] without failure of the electrical wire insulation or
the electrical conductors. Prevent contact between anode and tank surfaces
such as man-access hatches, ladders, heater pipes, and stay rods.
3.1.1.3
Anode Hangers
Anode hangers shall electrically insulate the anode suspending wire from
the tank steel.
3.1.1.4
Handholes
Provide a handhole having a diameter of 150 mm 6 inches in the tank roof
for each anode string to permit replacement or inspection of anodes.
3.1.2
Anode Connection
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NOTE: A single split-bolt will work loose when
wires it connects are moved. Minimum of two split
bolts will prevent this from happening. In water
tanks, split bolts are used (above water line only)
because working space is limited and hydraulic or
mechanical compression tools may be cumbersome and
hazardous to use. At ground level or in trenches,
compression tools can be used conveniently, and
swedged sleeve connection produced by such tools is
more reliable than split bolts.
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SECTION 13112N
Page 17
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