UFC 4-390-01
23 July 2003
b)
Proof of weldability and fabricability (if the
fabrication process or possible future repairs include welding).
c)
Fatigue data, preferably data in the high-stress, low-
cycle range (below 10,000 cycles), which considers the effect of
the environment (e.g., seawater, fresh water, oil, O2, HeO2 and
hydrogen).
d)
Data collected over a sufficient time period to justify
the adequacy of the material with respect to general corrosion,
susceptibility to stress-corrosion cracking, and compatibility
with adjacent materials in its intended environment.
e)
Nondestructive testing results on the material, the
heat-affected zone (HAZ), and the weld joints, as
appropriate.
A.3.2 Pressure Compensating and Hydraulic System Fluids.
As a
minimum, the applicant should submit the following:
a)
A list of the applicable military, federal or
commercial specifications
b)
Information covering flammability, resistance to
deterioration and compatibility with system component.
c)
Information relating to possible toxicological hazards
if used inside the unmanned pressure test facility
A.3.3 Electrical System Materials. All electrical system
materials and components should, as a minimum, meet the
requirements of Appendix B and the National Electric Code.
A.4
CATEGORY 3 - MATERIALS AND COMPONENTS
The basis for testing and the criteria for acceptance of new
materials and components will not necessarily be the same as for
those currently in use. The proof of the acceptability for the
material or component and the justification of the acceptance
criteria must be provided by the applicant. For example, the
applicant should demonstrate the effect of defects and
manufacturing variations on the reliability of the material or
component by appropriate model and/or prototype testing in a
simulated service environment. The applicant must establish that
a design using the new material or component provides at least
the same degree of safety as proven materials (Category 1) in a
similar application. As such, this may result in a higher factor
of safety being required for Category 3 materials.
Examples of Category 3 pressure vessel and other structural
materials are those generally characterized by low ductility,
such as ultra high-strength metals, glass, metallic composites,
concrete and ceramic materials.
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