Mineral Fiber Pipe Insulation

2.3.1

Piping in Tunnels

Nominal

Piping in Manholes

Aboveground Piping

Pipe Sizes

Insulation Thickness

(mm)

____________

____________________

less than 80

38.10

63.50

80 thru 100

50.80

76.20

125 and larger

63.50

88.90

Piping in Tunnels

Nominal

Piping in Manholes

Aboveground Piping

Pipe Sizes

Insulation Thickness

(Inches)

____________

____________________

less than 3

1.5

2.5

3 thru 4

2.0

3.0

5 and larger

2.5

3.5

2.3.2

Fiber Glass Pipe Insulation

Fiber glass pipe insulation having an insulating efficiency not less than

that of the specified thickness of mineral fiber pipe insulation may be

provided in lieu of mineral fiber pipe insulation for aboveground piping.

2.4

MINIMUM THICKNESS OF INSULATION FOR GRAVITY CONDENSATE (STEAM) PIPING

Provide 25 mm one inch thick fibrous glass pipe insulation for aboveground

piping. Provide 25 mm one inch thick mineral fiber, calcium silicate, or

cellular glass pipe insulation for piping in manholes and tunnels.

2.5

ALUMINUM JACKET

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NOTE: Use bracketed sentence for Naval Base Norfolk.

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ASTM B 209MASTM B 209, Temper H14, minimum thickness of 0.40 mm 0.016 inch,

with factory-applied polyethylene and kraft paper moisture barrier on

inside surface. Provide smooth surface jackets for jacket outside

diameters less than 200 mm 8 inches. Provide corrugated surface jackets

for jacket outside diameters 200 mm 8 inches and larger. Provide stainless

steel bands, minimum width of 13 mm 0.5 inch. Provide factory

prefabricated aluminum covers for insulation on fittings, valves, and

flanges.[ Aboveground jackets and bands shall have factory-applied

baked-on semigloss brown color conforming to Federal Standard FED-STD-595,

"Colors," color chip number 20062.]

2.6

ASPHALT-SATURATED FELT

ASTM D 226, without perforations, minimum weight of 0.49 kilograms per

square meter 10 pounds per 100 square feet.

2.7

STAINLESS STEEL JACKET

ASTM A 167 or ASTM A 240/A 240M; Type 304, minimum thickness of

0.25 mm

SECTION 15081N

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