2.10.3
Washers
Steel, cadmium plated, to fit within the bolt facing on the flange.
2.11
STEEL FLANGES AND BOLTING
2.11.1
Steel Flanges
ASME B16.5, [668 N] [1335 N] [150 lb.] [300 lb.].
2.11.2
Bolting
ASTM A 307, Grade B for bolts; ASTM A 194/A 194M, Grade 2 for nuts.
Dimensions: ASME B18.2.1 for bolts, ASME B18.2.2 for nuts. Threads: ASME
B1.1, Class 2A fit for bolts, Class 2B fit for nuts. Bolts shall extend
completely through the nuts and may have reduced shanks of a diameter not
less than the diameter at the roof of threads.
2.12
DIELECTRIC UNIONS
**************************************************************************
NOTE: On projects having piping installed by
Division 2, SITEWORK and/or Division 15, MECHANICAL,
coordinate the requirements for flanges and unions
with the appropriate section(s).
**************************************************************************
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].
2.13
EXOTHERMIC WELD KITS
Exothermic weld kits specifically designed by the manufacturer for welding
the types of materials and shapes provided.
2.14
ELECTRICALLY 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].
2.15
CASING INSULATORS AND SEALS
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.
PART 3
EXECUTION
3.1
INSTALLATION
[NFPA 70] [IEEE C2].
3.1.1
Anodes and Lead Wires
Provide [each] anode and lead wires as follows:
SECTION 13110N
Page 13
Previous Page
