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|  MIL-V-16556E(SH)
4.
QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection
Unless otherwise specified in the
contract or purchase order, the contractor is responsible for the performance of
all inspection requirements as specified herein. Except as otherwise specified
in the contract or purchase order, the contractor may use his own or any other
facilities suitable for the performance of the inspection requirements specified
herein, unless disapproved by the Government. The Government reserves the right
to perform any of the inspections set forth in the specification where such
inspections are deemed necessary to assure supplies and services conform to
prescribed requirements.
4.1.1 Responsibility for compliance. All items must meet all requirements
of sections 3 and 5. The inspection set forth in this specification shall become
a part of the contractor's overall inspection system or quality program. The
absence of any inspection requirements in the specification shall not relieve the
contractor of any responsibility of assuring that all products or supplies
submitted to the Government for acceptance comply with all requirements of the
contract.
Sampling in quality conformance does not authorize submission of known
defective material, either indicated or actual, nor does it commit the Government
to acceptance of defective material.
4.1.2 Inspection system. When specified in the contract or order, an
inspection system program plan shall be prepared (see 6.2.2).
4.2 First article inspection. First article inspection shall be conducted
at a laboratory satisfactory to the Naval Sea Systems Command (NAVSEA). First
article tests shall consist of the examination of 4.2.1 and the tests specified
in 4.2.2 through 4.2.5.
4.2.1 Ex amination.
The various materials and parts of the components of
each of the complete bypass valves shall be subjected CO an examination to
determine conformance with the various material specifications and with the
requirements of this specification.
4.2.2 Operation. The valve shall be installed in a line supplied with wet
saturated steam at a minimum of approximately 215 degrees Fahrenheit (F) (15.591
absolute) and the solenoid shall be connected to a source of the specified
electrical current and voltage (see 3.3.4). The valve shall be subjected to
steam flow for approximately 6000 cycles of operation. During this period of
operation the valve shall retain seat tightness in both of its operating posi-
tions. A test for seat tightness shall be conducted at internals of approxi-
mately 1000 cycles and at the completion of the cyclic test in accordance with
4.2.5. The tripping mechanism and the electrical apparatus shall function as
specified for the duration of the test.
4.2.3 Shock and vibration. Valves shall be shock and vibration tested in
accordance with 3.3.7 and 3.3.8. Upon completion of shock and vibration tests,
the valves shall be subjected to the tests specified in 4.2.4 and 4.2.5.
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