MIL-PRF-23653D
3.2.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
TABLE I. Average weight of vibration damping tiles.
Nominal
Average Weight
Average Weight
Thickness
Classes 1, 2, and 3
Class 2.5 (lb/ft²)
(Inches)
(lb/ft²)
0.9±0.05
--
2.8±0.1
3.1±0.1
4.5±0.2
--
3.4 Dimensions. Unless otherwise specified (see 6.2), the tiles shall be 12±1/16 by 12±1/16 inch in width and
length. The nominal but not limiting thickness is inch for tiles having a weight of 0.9 pounds per square foot
(lb/ft²), inch for tiles having a weight of 2.8 or 3.1 lb/ft², and inch for tiles having a weight of 4.5 lb/ft². Tiles
supplied under one contract or order from one manufacturer shall not differ in thickness by more than 1/16 inch except
for tiles having a weight of 0.9 pounds per square foot which shall not differ in thickness by more than 1/32 inch.
Tiles shall be of uniform thickness, square, and edges shall be perpendicular to faces (see 4.4.2).
3.5 Flame retardance. Tiles shall be rated at least self-extinguishing (see 4.4.3).
3.6 Fuel and water resistance. Tile weight gain shall be not greater than 0.2 percent as a result of immersion in
JP-5 fuel in accordance with MIL-DTL-5624 and shall be not greater than 0.5 percent as a result of immersion in
distilled water (see 4.4.4).
3.7 Adhesion. Bond strength between the tile and the adhesive shall be equal to or greater than the cohesive
strength of the tile (see 4.4.5). The average cohesive strength of the tile shall be not less than the following:
Class 1
-
80 pounds per square inch (lb/in²)
Class 2
-
250 lb/in²
Class 2.5
-
250 lb/in²
Class 3
-
300 lb/in²
3.8 Vibration damping performance.
3.8.1 Initial damping performance. Initial vibration damping performance shall be as specified in tables II, III,
3.8.2 Damping performance after oven aging. Vibration damping performance after oven aging shall be as
specified in tables II, III, IV, and V, as appropriate, and individual values shall be at least 70 percent of the initial
damping values (see 4.4.6).
3.9 Hardness. The average hardness of the tiles shall be not greater than ±10 durometer points from the values
obtained on tiles submitted for qualification tests (see 4.4.7).
3.10 Permanent compressibility (class 1 only). Decrease in tile volume shall be not greater than 5 percent (see
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business