MIL-DTL-18182F
wrench surface. No deviation from items being identical as specified in 3.5 will be acceptable without
prior written approval of the contracting officer.
4.3 Tests. Each union selected in accordance with 4.2.1.1.1 shall be tested to determine compliance
with the requirements of this specification. Tests shall be conducted as specified in 4.3.1 through 4.3.3.
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4.3.1 Air pressure test. The unions shall be tested for leaks, under water or light oil, with air at 100 lb/in
minimum pressure. Any leaks shall be cause for rejection. No copper or rusting solution, cement or
welding will be permitted.
4.3.2 Hydrostatic test. The unions shall be subjected to hydrostatic pressure and fitness for use
determined by satisfying all the requirements contained in section 3 and verified in section 4.
4.3.3 Tension test. Unless otherwise specified (see 6.2), the unions shall be subjected to tension load.
This test shall be conducted by inserting solid bars corresponding to the outside diameter of the pipe,
threaded and screwed into each female threaded end of the union; and by screwing male threaded ends
into a suitable tapped block which is arranged for anchorage in the testing machine.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2 and 6.8). When actual packaging of materiel is to be performed by DoD
personnel, these personnel need to contact the responsible packaging activity to ascertain requisite
packaging requirements. Packaging requirements are maintained by the Inventory Control Point
packaging activity within the Military Department or Defense Agency, or within the Military Department's
System Command. Packaging data retrieval is available from the managing Military Department or
Defense Agency automated packaging files, CD-ROM products, or by contacting the responsible
packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. Unions covered by this specification are suitable for use on systems involving high
pressure saturated or superheated steam, hot or cold water, hot or cold non-corrosive oil, gas, air, or
other fluids.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Issue of DODISS to be cited in the solicitation, and if required, the specific issue of individual
documents referenced (see 2.2).
c. Part or Identifying Number (PIN) required (see 6.3 and 6.8).
d. If insert seats should be used (see 3.8.1.2.1).
e. If tension test is other than specified (see 4.3.3).
f. Level of preservation and level of packing required (see 5.1).
g. Conformance inspection data retention requirements (see 4.2.1).
h. Sampling plan and tests, if other than as specified (see 4.2.1.1.1).
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