MIL-PRF-62410 Tube Assembly Metal: Swaged Hydraulic, \(M1, Tank\)This specification covers the performance, design, and test requirements for swaged hydraulic tube assemblies which provide hydraulic fluid, under pressure, to vehicle hydraulic system components. Tube assembly is swaged, separable, flareless type, and threaded one end to allow connection to standard fitting \(see 6.2\).

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MIL-PRF-62410B(AT)

where:

P = test pressure in psi (MPa)

S = 30,000 psi (206.8 MPa)

D = maximum permissible outside diameter (nominal OD plus tolerance),

inch (cm)

d = maximum permissible inside diameter, inch (cm), (computed as D less

twice the minimum permissible wall thickness)

3.4.6 Repeated assembly. The separable tube assembly shall be capable of repeated

assemblies without leakage or failure utilizing the tightening requirements as specified herein

(see 4.7.15).

3.4.6.1 Assembly tightening. Fittings shall be clean at time of assembly, do not

lubricate. The ferrule, nut, and fitting seat shall be free from foreign materials, burrs, nicks and

scratches. Figure 1 provides a visual inspection of the points that shall be in contact prior to final

tightening (see 4.7.15).

3.4.7 Environmental conditions.

3.4.7.1 Operating temperature. The tube assembly shall be capable of withstanding an

operating temperature of -65�2 degrees Fahrenheit (�F) (-54�1 degrees Celsius (�C)) to

+275�5 �F (+135�3 �C) for no less than 4 hours and after exposure shall not leak or fail when

subjected to a proof pressure test (see 4.7.11, 4.8.2 and 4.8.3).

3.4.8 Corrosion-resistance. The tube assembly shall not be damaged nor its performance

impaired after exposure to salt fog. After exposure the assembly shall not leak or fail when

subjected to the proof pressure test (see 4.9).