 CodeCalc
Fitness for Service per API 579 in
CodeCalc/PVElite
Fitness for Service (FFS) assessment using
API Recommended Practice 579 is performed to assess the
operation safety and reliability of the process plant equipment,
such as pressure vessels, piping and tanks for some desired
future period. The assessment procedure will provide an
estimate of the remaining strength of the equipment in its
current state in which may have been degraded while in-service
from its original condition.
Most pressure vessel design codes such as
ASME Section VIII Division-1, do not address local thin
areas (LTAs), requiring minimum component wall thickness
to be more than a calculated value. On the other hand, Fitness
for Service standards such as API-579 credits the area (where
thickness > tmin) around the damaged portion. So, in
this regard the API-579 code is better suited for pressure
equipment with flaws like (LTAs).
CodeCalc 6.5 (and PVElite
5.0) include metal loss assessment according to API 579
Section 4 and Section 5 (Level 1 and Level 2) for vessel
elements such as cylindrical shells, simple cones, and formed
heads. Future software release will include analysis of
other flaw types.
For additional information please visit:
http://www.coade.com/ccarticles/pcc_ffs.htm |
