MIL-DTL-22244F (OS)
4.5 Tests.
4.5.1 Smokeless powder, condition. Smokeless powder shall be inspected in accordance with the
applicable paragraphs of OP 5. Evidence of decomposition shall be cause for rejection.
4.5.2 Visual examination. All cartridges shall be visually examined. Cartridges having any of the defects
of 3.10 shall be cause for rejection. The preservation-packaging, packing, and marking of the cartridges
shall be examined for conformance to section 5 and the contract (see 6.3).
4.5.3 Bridge circuit resistance. Conformance with the bridge circuit resistance of 3.8.1 shall be
ascertained on all completely assembled cartridges by means of a test circuit which limits the bridge
circuit current to 50 milliamperes, maximum. A safety chamber with an interlock switch shall be used to
protect the operator during the application of current. A suitable instrument which is known to be accurate
to within 0.005 ohm in the range of resistance specified shall be used to determine whether or not the
requirement is being met. Units which fail to meet the requirement of 3.8.1 shall be cause for rejection.
The results of bridge circuit resistance measurements shall not be affected by resistance of the test circuit
and connector.
4.5.4 Bridgewire circuit continuity. After soldering the bridgewire, the unloaded shell assembly
(Drawing 1861735) shall be thoroughly cleaned to remove flux and contamination. After cleaning, the
bridgewire shall be flashed with an electric current using a voltage source of 6 volts ac or dc to produce a
visible red glow of the bridge and ensure continuity. A suitable resistor may be used to regulate the
current to the bridge. Flashing is a necessary manufacturing operation and shall be conducted on each
loaded assembly. Assemblies with bridgewires which fail to glow shall be cause for rejection. Any faulty
assemblies may be reworked by replacement of the bridges.
4.5.5 Unloaded shell assembly leakage. Apply not less than 10 psi of air pressure internally to all
unloaded shell assemblies (Drawing 1861735) which have passed the continuity test of 4.5.4 and check
for leaks. All assemblies that show evidence of leakage shall be cause for rejection.
4.5.6 Radiographic inspection. All cartridges shall be radiographically examined in accordance with
ASTM E 545. Cartridges having any observable imperfections in assembly shall be cause for rejection.
The cartridges shall be positioned on their sides for the most revealing exposure. All cartridges shall be
identified with serial numbers prior to examination. The cartridge serial numbers shall be in consecutive
numerical order beginning with the number 001 in each production lot. The cartridges shall be arranged
on trays or boards in consecutive numerical order, and each radiograph shall carry a permanent
identification of the cartridges displayed thereon. The radiograph identification shall include the complete
lot number, as stamped on the cartridges, and the span of serial numbers displayed. Discontinuities in
serial numbers shall be identified on the N-ray. Defective cartridges found by the vendor shall be clearly
identified on the N-ray and those defectives removed from the production lot. The serial numbers shall be
pen or ink stamped on the cartridge with approximately 1/8-inch-high characters. The serial numbers shall
be located apart from the other cartridge markings.
4.5.6.1 Sample radiographic plate. A sample radiographic plate and technique shall be submitted for n-
ray by the contractor for approval prior to submitting radiographs for the production lot. The production
lot radiographs shall be made using the identical technique utilized to produce the approved sample plate.
6
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business