MIL-S-4953C(USAF)
Frequency band Noise level limit
(cycles per second) (db. Above 0.0002 dynes/cc2)
20 to 75 108
75 to 150 98
150 to 300 90
300 to 600 83
600 to 1,200 78
1,200 to 2,400 75
2,400 to 4,800 72
4,800 to 10,000 71
3.23 Dimensions. The overall dimensions of the spray outfit shall not exceed:
a. Height - 35 inches b. Length - 80 inches c. Width - 60 inches
3.24 Pipe threads. Pipe threads shall be in accordance with Handbook H28.
3.25 Finish. The exterior and interior surfaces not subject to high temperatures shall be finished with two coats or more of yellow enamel conforming to TT-E-529, color Number 13538 of FED- STD-595.
3.25.1 Exterior or exposed surfaces. All exposed parts, including iron and steel screws, nuts, bolts, washers, and lockwashers, shall be suitably protected against corrosion by permanent and impermeable finishes. For large bolts and nuts, painting shall be sufficient. The outside of all castings shall be smooth.
3.25.2 Interior (inclosed) surfaces. All interior surfaces shall be protected with a corrosion resistant coating.
3.25.2.1 All steel sheets shall have protective surface treatments and corrosion resistant finishes.
3.25.2.2 No magnesium alloys shall be employed.
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