UFC 4-390-01
23 July 2003
of cycles, etc.,)
c) Effect of ambient operating conditions and the
effect of mechanical shock and vibrations on design life
d)
Depth and pressure limitations
e)
Design temperature limits
f)
Identification of anticipated hazards
g)
Corrosion allowance and resistance requirements
h)
Soil and foundation considerations where applicable
i)
Floor loads including hydrostatic test weight
3.2.5
Design Analysis. A complete and thorough design
analysis should be submitted for SCA review and concurrence. The
design analysis should consist of formal design calculations and
a complete stress analysis as explained below.
Design Calculations. Design calculations should be
3.2.5.1
submitted for SCA review and concurrence to demonstrate the
adequacy of design. All assumptions should be clearly stated.
Calculations should show the effect of building to worst-case
dimensions and tolerances. Potential effects of corrosion should
be considered. Appropriate reference should be made to
applicable test data or operating experience when either is used
to support a calculation technique. Design calculations should
clearly show the adequacy of the item analyzed in terms of the
system design parameters. Information must be submitted in
sufficient detail to permit independent analysis of the design.
Documentation submitted by the applicant should be tabulated to
ensure that the information completely covers the design.
Stress Analysis. Applicant should verify the adequacy
3.2.5.2
of the design by performing detailed stress analyses and, when
appropriate, by conducting the tests described herein.
Applicable sections and provisions of pressure vessel and piping
design codes should be applied. Test programs in support of
system certification should consider all ramifications of the
stress analyses. Stress analyses and test reports submitted by
the applicant should also consider the most critical loading case
which includes the cumulative detrimental effects of design
allowances, dimensional variations, and tolerances. Applicant
may request that specific designs utilizing standard materials or
components be exempted from stress analysis, based on technical
justification. In cases where the pressure boundary is a unique
and complex shape, destructive testing may be required if the
validity of a stress analysis is in question. The SCA will then
make a determination of those materials and systems that do not
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