2.5.5
Insulation
Type RHW-USE insulation shall comply with NFPA 70. Polyethylene insulation
shall comply with ASTM D 1248; high molecular weight polyethylene shall be
Type I, Class C, Grade E5; high density polyethylene shall be Type III,
Class C, Grade E3.
2.5.6
Conduit Steel
Conduit steel shall conform to UL 6 and ANSI C80.1.
2.5.7
Tape
Pressure-sensitive vinyl plastic electrical tape shall conform to UL 510.
2.5.8
Backfill Shields
Shields shall consist of approved wrapping of reinforced fiberglass
coal-tar impregnated tape, or plastic weld caps specifically made for the
purpose and installed in accordance with the manufacturer's
recommendations. When joint bonds are required, due to the use of
mechanical joints, the entire joint shall be protected with kraft paper
joint cover. The joint cover shall be filled with poured hot coal-tar
enamel.
2.5.9
Electrical connections shall be done as follows:
a.
Exothermic welds shall be "Cadweld" or Burndy "Thermo-Weld" or
approved equal. Use of these materials shall be in accordance
with the manufacturer's recommendations.
b.
Electrical shielded arc welds on steel pipe shall be approved via
shop drawing action.
c.
Other methods of welding shall be specifically approved for use by
the pipe manufacturer.
2.5.10
Anode Storage
Storage for magnesium anodes
will be designated by the Contracting Officer.
If anodes are not stored in
a building, they shall be protected from
inclement weather. Packaged
anodes damaged as result of improper handling
or weather exposure shall be
resacked by the Contractor and the required
backfill added.
2.5.11
Anode Installation
Anode configuration and size shall be as indicated. A minimum of [one]
[two] [three] [ten] [15] [_____] anodes are required to achieve minus 850
millivolts "instant off" potential and shall be required on the [_____]
components or structure. Details shown are indicative of the general type
of material required and are not intended to restrict selection of
materials or of any particular manufacturer. The anode system shall be
designed for a life of 25 years of continuous operation.
SECTION 13112A
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