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12.2.10.2 Formal analysis required
Any piping system which does not meet the criteria in 12.2.10.1 shall be analysed by a method of
analysis which is either simplified or approximate or comprehensive.
319.4.2 Formal Analysis Requirements
(a) Any piping system that does not meet the criteria in
para. 319.4.1 shall be analyzed by a simplified, approximate,
or comprehensive method of analysis, as appropriate.
(b) A simplified or approximate method may be applied
only if used within the range of configurations for which its
adequacy has been demonstrated.
(c) Acceptable comprehensive methods of analysis
include analytical and chart methods that provide an
evaluation of the forces, moments, and stresses caused
by displacement strains (see para. 319.2.1).
(d) Comprehensive analysis shall take into account
stress intensification factors for any component other
than straight pipe. Credit may be taken for the extra flexibility
of such a component.
pennpiper said:Cardin/XL83NL,
Is "Flex analysis for piping" the same "as Stress analysis for piping"?
Or, is "Flex" the new term?
When did it change?
Who changed it?
And, why did it change?
319.4 Flexibility Analysis
319.4.1 Formal Analysis Not Required. No formal
analysis of adequate flexibility is required for a piping
system that
(a) duplicates, or replaces without significant change, a
system operating with a successful service record
(b) can readily be judged adequate by comparison with
previously analyzed systems
(c) is of uniform size, has no more than two points of
fixation, no intermediate restraints, and falls within the
limitations of empirical eq. (16)[sup]8[/sup]
ASMEB31.3 said:319.4.1 Formal Analysis Not Required. No formal
analysis of adequate flexibility is required for a piping
system that
(a) duplicates, or replaces without significant change,
a system operating with a successful service record
(b) can readily be judged adequate by comparison
with previously analyzed systems
(c) is of uniform size, has no more than two points
of fixation, no intermediate restraints, and falls within
the limitations of empirical eq. (16)8