2.7
DIELECTRIC UNIONS
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NOTE: On projects having piping installed by
DIVISION 2, SITE WORK and/or DIVISION 15,
MECHANICAL, coordinate the requirements for flanges
and unions with the appropriate section(s).
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ASME B16.39, Class [1] [2] for dimensional, strength, and pressure
requirements. Insulation barrier shall limit galvanic current to one
percent of the short-circuit current in a corresponding metallic joint.
Provide insulating material impervious to [water] [oil] [gas].
2.8
UL 467.
2.9
ELECTRICAL INSULATING COATINGS
[Heat-shrinkable tape] [Conformable water tight sealant having dielectric
strength not less than 15 kV for a 3 mm 1/8 inch thick layer].
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NOTE: Rectifiers shall be pad or post mounted.
Select the appropriate paragraph.
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[2.10
CONCRETE RECTIFIER PAD
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NOTE: Provide detail on the drawings.
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Dimensions, conduit locations, and anchor bolt location [as indicated] [in
accordance with] the manufacturer's drawings for the equipment furnished.
2.10.1
Concrete
20.67 MPa3000 psi concrete conforming to [ASTM C 94] [Section 03300N
CAST-IN-PLACE CONCRETE.]
][2.11
RECTIFIER MOUNTING POST
[Galvanized steel pipe, Schedule [40] [80]], [wood post, full length
pressure treated with pentachlorophenol].
]2.12
Casing insulators shall have a minimum [305] [_____] mm [12] [_____] inch
band width, [constructed of heat fused plastic coated steel] [_____] and
multi-segmented to attach firmly around the pipe. Casing end seals shall
be S-shaped rubber seals with stainless steel straps.
2.13
PERMANENT REFERENCE ELECTRODES
Permanent reference electrodes shall be [copper copper-sulfate] [silver
silver-chloride] [zinc] specifically manufactured for [underground]
[marine] use, [31.75] [_____] mm [1 1/4] [_____] inch diameter, by [255]
SECTION 13111N
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