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MIL-P-21343(SHIPS)
MILITARY (cont'd.)
MIL-B-17931 - Bearings, Ball, Annular, Specially Selected for Quiet
Operation (Noise Tested).
MIL-P-18608 - Pumps, Centrifugal, Submarine Trim and Drain.
MIL-C-20159 - Copper-Nickel-Alloy (70-30): Castings.
NAVY DEPARTMENT
General Specifications for Inspection of Material.
STANDARDS
MILITARY
MIL-STD-278 - Welding and Allied Processes for Machinery for Ships of the
United States Navy.
DRAWINGS
BUREAU OF SHIPS
B-153 - Packings and Gaskets, Standard Application of.
810-1, 385, 860 - Flanges, Dimensions, Submarine Pumps.
(Copies of specifications standards, drawings, and publications required by contractors in connec-
tion with specific procurement functions should be obtained from the procuring agency or as directed by
the contracting officer.)
2.2 Other publications. - The following document forms a part of this specification Unless other-
wise indicated, the issue in effect on date of invitation for bids shall apply.
NATIONAL BUREAU OF STANDARDS
Handbook H28 - Screw-Thread Standards for Federal Services,
(Application for copies should be addressed to the Superintendent of Documents, Government
Printing Office, Washington 25, D.C.)
3. REQUIREMENTS
3.1 Qualification - Pumps furnished under this specification shall be a product which has been
tested and has passed the qualification tests specified herein (see 6.2).
3.2 General design -
3.2.1 The principle of reliability is paramount and no compromise of this principle shall be made
with any other basic requirements of design.  It is the intention of this specification to obtain purpose of
such design that they will operate over a long period of years with a minimum of servicing.  Where
wear or erosion is unavoidable the parts subjected to such wear or erosion shall be of the best materials
available for the. purpose in order to reduce these detrimental effects to a minimum.  The design and
construction of all pumps shall be the most compact consistent with the following requirements.
(a)
Reliability.
(b)
Accessibility for repair.
(c)
Resistance to wear or corrosion
(d)
Economy.
(e)
Satisfactory operation when inclined as follows:
(1) During submerged operation permanently inclined 30 degrees from
the normal position and when rolling 30 degrees from the vertical
to either side.  The time for a complete roll cycle shall be 12 seconds
2

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