MIL-PRF-15618 Filter-Separator, Fluid, Pressure, Aviation And Distillate Fuel, Naval ShipboardThis specification covers filter-separator assembly \(see 6.5.2\) for use in shipboard fuel systems. The filter-separator assembly described in this specification, with filter elements qualified to MIL-PRF-32148, is intended for use onboard Naval ships to remove solids and water from fuel systems. These filter-separator assemblies are used with JP-5 fuel for aircraft, Naval Distillate or JP-5 for propulsion and auxiliary power gas turbines, Naval Distillate or JP-5 for diesel engines, and other miscellaneous internal combustion engines.

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MIL-PRF-15618H (SH)

(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or

https://assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D,

Philadelphia, PA 19111-5094.)

2.3 Non-Government publications. The following documents form a part of this document to the extent

specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or

contract.

AMERICAN PETROLEUM INSTITUTE (API)

API/IP 1581

Specifications and Qualification Procedures for Aviation Jet Fuel

Filter/Separators

(Copies of this document are available from API Publications, Global Engineering Documents, 15 Inverness

Way East, M/S C303B, Englewood, CO 80112-5776 or online at www.api.org.)

ASME INTERNATIONAL

ASME Boiler and Pressure Vessel Code, Section VIII, Pressure Vessels

ASME B16.5

Pipe Flanges and Flanged Fittings: NPS 1/2 through 24 (DoD adopted)

(Copies of these documents are available from ASME International, 22 Law Drive, PO Box 2900, Fairfield, NJ

07007-2900 or online at www.asme.org.)

2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited

herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws

and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 General. The filter-separator assembly shall conform to API/IP 1581 unless otherwise indicated by this

specification. The filter-separator shall utilize coalescer and separator elements (see 6.5.1 and 6.5.3) qualified to

MIL-PRF-32148.

3.2 First article. When specified (see 6.2), the filter-separator assembly shall be subjected to first article

inspection in accordance with 4.1.1.

3.3 Materials. Materials used in the fabrication of the filter-separator assembly shall be stainless steel as

specified (see 6.2) in accordance with API/IP 1581 except that copper-nickel alloys are allowed for replacement of

existing units in copper-nickel piping systems.

3.3.1 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.

3.3.2 Gaskets. Gasket material shall be compatible with the fuel types listed in 3.6.2.

3.4 Performance requirements.

3.4.1 Working pressure and flow rate. The filter-separator assembly maximum allowable working pressure and

flow rate shall be as specified (see 6.2).

3.4.2 Hydrostatic test. The filter-separator assembly shall meet hydrostatic test requirement of 150 percent of

the design pressure.

3.4.3 Effluent fuel. The filter-separator assembly shall meet the effluent fuel requirements specified in MIL-

PRF-32148.

3.4.4 Solids holding capacity. The filter-separator assembly shall meet the solids holding capacity

requirements specified in MIL-PRF-32148.