MIL-PRF-24790A (SH)
4.6.5 Simulated service testing. The rotary and reciprocating pump packing test methods shall be as
specified in appendices A, B and C for Type I, Class A, and as specified in Appendix A for Type II, Class A. The
test schematics referenced in Appendices A, B and C are included because there are no commercial test equipment
which are known to be capable of evaluating packing for simulated performance requirements in paragraph 3.5.
4.6.5.1 Shaft wear. Shaft wear shall be measured using an outside micrometer. Measurements shall be made
prior to and upon completion of each simulated service test at not less than 1/4-inch intervals along the shaft in the
area where the packing rings are seated. A second set of measurements shall be made along the shaft 90 degrees
from the initial measurements (see 3.5.3).
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). 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's 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's or Defense Agency's 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. Packing is primarily intended for general shipboard service in rotating rod, centrifugal,
and reciprocating rod pumps handling various fluids and gasses (see 6.7). These packings are military unique
because they are subject to stringent composition and performance controls required for pumps used on U.S. Navy
surface ships and submarines.
6.2 Acquisition requirements. Acquisition documents must specify the following:
(a)
Title, number and date of the 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)
Type, class, size, and form required (see 1.2, 3.6, and 3.7).
(d)
Inspection conditions, if other than as specified (see 4.2.
(e)
Packaging requirements (see 5.1).
(f)
Is Material Safety Data Sheet required (see 6.4).
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products
which are, at the time of award of contract, qualified for inclusion in Qualified Products List QPL No. 24790
whether or not such products have actually been so listed by that date. The attention of the contractors is called to
these requirements, and manufacturers are urged to arrange to have the products that they propose to offer to the
Federal Government tested for qualification in order that they may be eligible to be awarded contracts or purchase
orders for the products covered by this specification. Information pertaining to qualification of products may be
obtained from Naval Sea Systems Command, SEA 03R42, 2531 Jefferson Davis Hwy, Arlington, VA 22242-5160.
6.3.1 Copies of "Provisions Governing Qualification SD-6" may be obtained upon application to
Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.
6.4 Material Safety Data Sheets. The packing material covered by this specification contains materials
which may be hazardous to personnel and a Material Safety data Sheet (MSDS) is needed for employee safety
programs. Contracting officers will identify those activities requiring copies of completed MSDS prepared in
accordance with FED-STD-313. In order to obtain MSDS, FAR clause 52.223-3 must be in the contract.
6.5 Packing substitutions. Table IX has been prepared to facilitate substitution of non-asbestos packing
materials for asbestos packing materials in pump applications. The asbestos-containing packings are identified by
military specifications, designators, and application information.
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