18.104.22.168 The list shall be so treated as to be resistant to oil, water and fading.
3.11.5 Stock. - The selection stock numbering and quantities of repair parts for stock of Naval
supply activities shall be determined and processed in accordance with Specification MIL-R-15137.
22.214.171.124 The cognizant supply demand control point for repair parts for stock is Submarine Supply
Office, Phila. Pa., unless otherwise specified in the contract or order.
3.12 Workmanship. - The equipment, including all parts and accessories, shall be manufactured
and finished with first class workmanship in all respects.
4. QUALITY ASSURANCE PROVISIONS
4.1 Qualification tests. -
4.1.1 Qualification tests at a laboratory. - Qualification tests shall be conducted at a laboratory
designated by the Bureau of Ships. The head, capacity and other characteristics of units for qualifica-
tion tests shall be as specified by the Bureau of Ships.
4.1.2 In addition to the tests at the laboratory, pumps may be required to pass the following
shipboard service test:
(a) Two or more pumps of the general design and general operating characteristics
shall have given satisfactory service onboard a Naval ship for a period of at
least two years and must still be in service on such ship at the time qualifica-
tion is granted.
4.1.3 The qualification tests shall adequately demonstrate the ability of the pump to handle the
specified capacities at the maximum specified temperature of the liquid and the minimum suction head
or maximum suction lift or vacuum. Sufficient data shall be taken during the tests to prepare pump
characteristic curves as required herein. Test data and curves shall be complete over the entire
range of capacities from shut-off to as near free delivery as possible and shall be obtained for at
least two speeds on both series and parallel operations. The following test curves shall be prepared:
(a) Capacity versus total head,
(b) Capacity versus pump efficiency.
(c) Capacity versus brake horsepower.
4.1.4 Endurance test. - The pump shall be operated with impeller at maximum speed for
24 hours continuous at a capacity as near free delivery as possible and for 12 hours with impeller,
in series at maximum speed at a capacity as near shut-off as possible. Failure of any part of the
pump during the endurance test shall be considered as failure of the pump to quality. The pump shall
complete the endurance test without excessive noise, vibration or wear of parts.