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Page Title:
Quality conformance verification inspection |
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|  MIL-R-25410G
4.6 Quality conformance verification inspection. Upon successful
completion of the quality conformance inspection requirements of 4.5, a
random sample, one for every 50 or fraction thereof, shall be selected from
each lot of regulators. Each regulator, selected as a sample unit, shall
be forwarded to a laboratory designated at the time of award (see 6.2g).
The designated laboratory shall conduct the following tests and examinations
(listed sequence mandatory):
a.
Visual examination
b.
Flow characteristics
c.
Oxygen-ratio
d.
Pressure-breathing characteristics
e.
Over-all regulator leakage
f.
Demand valve leakage
g.
Relief valve
h.
Flow indicator
i.
Pressure gauge scale error
Submitted samples shall be identified by their assigned serial number (see
3.11.1) In addition the serial numbers of the units in the lot, represented
by the sample units, shall be included with the data accompanying the samples
to the laboratory. The Govemnent activity responsible for conducting the
quality conformance verification program {see 6.2g) shall report the results
of the tests and examinations to the designated inspection and acceptance
activity specified in the acquisition document. Final acceptance of the lot
from which the sample units were selected shall be based upon successful
completion of the inspection program by the cognizant Quality Assurance
Representative/Speciaist at the contractor's facility.
4.7 Test conditions.
4.7.1 Test gas. Unless otherwise specified, water pumped oil free
nitrogen conforming to BB-N-411 or compressed breathing air conforming to
BB-A-1034 shall be used in testing of the regulators.
4.7.2 Oxygen. Oxygen conforming to MIL-0-27210, Type I shall be
used for the oxyen regulator purge test (see 4.8.25) and the oxygen bomb
test (see 4.8.26).
4.7.3 Temperature and pressure. Unless otherwise specified, tests
shall be conducted at local ambient temperature and barmetric pressure.
Test instruments shall be calibrated or adjusted according to their required
usage in conducting individual tests. Any test results obtained at
conditions other than normal temperature and pressure (NTP) conditions shall
be mathematically corrected to NTP conditions. NTP conditions are 29.92
inches of mercury and 70F. In the case of pressure drop measurements,
the flow setting for conducting the test shall be corrected to NTP
conditions before the test is conducted.
4.7.4 Test position. Unless otherwise specified, all tests shall be
conducted with the panel in a horizontal plane (face up).
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