 |
|||
|
|
|||
| ||||||||||
|
| MIL-T-46691B
manufacture. When alternate materials or methods of manufacture are specified on the drawings,
the bidder's selections shall be clearly stated in the proposal.
3.2.1 Raw material. The contractor shall be responsible for selecting from the
classification list contained in the raw material specification the surface and physical
condition of the raw material intended for use in manufacture.
3.3 Hardness and other physical properties. Hardness and other physical properties required
by the drawing shall be uniform throughout the part within specified tolerances. Requirements for
all alloy steel parts shall be achieved by quenching and tempering.
3.4 Hydrostatic pressure. The cylinder and head shall withstand a hydrostatic pressure of
10,000 pounds per square inch (psi) for 15 seconds, minimum, without leaking, deformation, or
mechanical failure (see 6.4.1).
3.5 Shear pin strength. The shear pin, after application of protective finish, shall shear
when a load of 41 5 pounds is applied at the steady rate of 0.125 inch per minute.
3.6 Metal parts assembly. Parts shall be combined to produce an assembly which conforms to
the requirements of the metal parts assembly drawing and the following.
3.6.1 Fluid leakage. The thruster subassembly (less head, cartridge retainer, and spring)
shall show no evidence of fluid leakage after a minimum of 16 hours, when kept in a vertical
position with the open end of the cylinder pointing down.
3.6.2 Head and cylinder. The head and cylinder shall be assembled with a sufficient torque
to lightly bottom components.
3.6.3 Presence of piston, shear pin. Upon completion of assembly, a load of 20 2 pounds
shall be applied to the locking pin to determine if the shear pin is properly engaged.
3.7 Protective finish. Protective finish shall be in accordance with the applicable
specifications and shall apply to all surfaces of the component regardless of contour
configuration.
3.8 Residual magnetism. The metal parts assembly shall not deflect the indicator of the
compass more than five degrees in either direction using procedures in 4.6.7.
3.9 Workmanship. Thrusters shall be free of cracks, splits, or other defects which might
prevent proper mating with connecting parts or proper functioning of the device.
3.9.1 Metal defects. All components shall be free from cracks, splits, cold shuts,
inclusions, porosity, or any similar defect.
3
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals