MIL-PRF-83756D
4.
VERIFICATION
4.1 Classification of inspections. The inspection and testing of the blast machines shall be classified as follows:
a. First article inspection (see 4.2).
b. Conformance inspection (see 4.3).
4.2 First article inspection. The pre-production tests shall consist of all the tests described under 4.5 except the
individual acceptance tests specified in 4.4.12.
4.3 . Conformance inspection. Each production item shall be subjected to an acceptance test consisting of the
following tests as described under 4.4.
a. Examination of the product (see 4.4.1)
b. Mechanical inspection (see 4.4.2)
c. Functional check (see 4.4.3)
d. Pressure test (see 4.4.4)
e. Dielectric strength test (see 4.4.5)
f. Individual acceptance test (see 4.4.12)
g. Noise test (Type I) (see 4.4.13)
4.4 Test methods.
4.4.1 Examination of the product. The blast machine shall be examined to determine compliance with the
requirements of this document. The examination shall be conducted using a manufacturing developed check list
that lists each specification characteristic, method of verification and results obtained.
4.4.2 Mechanical inspection. A mechanical inspection of all components and parts of the machine for defects and
damage shall be conducted. All pertinent data concerning condition, defects in workmanship, and damage shall be
recorded.
4.4.3 Functional check. All mechanical parts of the blast machine shall be checked to determine if each operates
freely and functions properly. The functional check shall be conducted using a manufacturer developed list that
shall show functions checked, how checked and results obtained.
4.4.4 Pressure test. Each component and circuit of the blast machine that operates under positive pressure in
normal service shall be hydrostatically (or pneumatically or with carbon dioxide gas at the contractor's option)
pressure tested at 1 ½ times working pressure for not less than 10 minutes. Distortion, damage, or leaks resulting
from the pressure testing shall be cause for rejection of the components affected.
4.4.5 Dielectric strength test. The electrical system shall be subjected to a dielectric strength test at a potential
equal to twice the working voltage plug 1,000 volts for a period of one minute. Any arcing, flash-over or charring
of the insulation shall cause rejection of the machine.
4.4.6 Performance test. The blast machine shall be subjected to a 4-hour performance test using blasting media
conforming to the requirements of 3.3. During the test period, the machine shall be used to perform cleaning tasks
that will demonstrate the cleaning capability of the unit. The contractor will provide the exhibits to be cleaned,
5
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business