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MIL-PRF-24758 Conduit Systems, Flexible, WeatherproofThis specification covers the performance requirements for weatherproof flexible conduit systems \(see 6.3.12\) for use primarily in exposed areas \(see 6.3.10\) on U.S. Navy ships, to shield against electromagnetic \(EM\) radiation from own-ship transmitters and emissions external to the ship, electromagnetic pulse \(EMP\) \(see 6.3.8\) events, and to minimize corrosion \(see 6.3.6\) while being field repairable to reduce maintenance.

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MIL-PRF-24758A(SH)

3.11 Marking. Conduits shall be marked with:

a. Name of the manufacturer, responsible vendor, trademark, or other identifying symbol.

Classification codes in accordance with applicable IEC 60614-1 Annex A.

Any other mark or symbol required by IEC 60614-2-5 Annex A.

"Halogen Free" shall appear on all conduits.

The markings on conduits and conduit fittings shall be legibly and permanently marked on the material, and located

as described in 3.11.1 and 3.11.2 to insure readability when the fittings are installed.

3.11.1 Flexible conduit marking. The weatherproof jackets of flexible conduits shall be paintable or surface

ship gray in color. If a conduit is marked with a type reference and/or a size, these markings are placed before the

identification of the manufacturer or responsible vendor. Marking of classification codes shall be in accordance

with Annex A of IEC 60614-2-5. Markings of conduits shall be at 11.81-inch (30-cm) intervals.

Conduit fittings marking. Each conduit fitting shall be marked with:

3.11.2

Name of the manufacturer, responsible vendor, trademark, or other identifying symbol.

Classification codes in accordance with IEC 61035-1 Annex A.

VERIFICATION

Classification of inspections. The inspection requirements specified herein are classified as follows:

4.1

First article inspection (see 4.2).

Conformance inspection (see 4.3).

4.2 First article inspection. First article inspection shall be performed as specified (see 3.2). This inspection

shall include the examination of 4.4 and the tests listed in Table II. Any changes to the product design, materials, or

production process shall automatically require re-testing and re-certification of product samples.

TABLE II. First article inspection.

Test

Requirement Paragraph

Verification Paragraph

Flexible conduit size

3.5.1

4.5.1

Conduit fittings size

3.5.2

4.5.2

Interchangeability

3.5.3

4.5.3

Conduit and joint/systems

3.6

4.6

Compression

3.7.1

4.7.1

Impact

3.7.2

4.7.2

Vibration

3.7.3

4.7.3

Tensile strength

3.7.4

4.7.4

Flexing

3.7.5

4.7.5

Resistance to heat

3.7.6

4.7.6