O’Donnell Consulting performed a seven-year program to recertify pressure vessels and pressure systems for the NASA-Glenn Research Center.
Some of the vessels and systems were over forty years old, and were part of the original NACA installation. The program covered vessels and piping systems, including:
(1) Performing stress, fatigue and fracture analyses to establish regions to be subjected to nondestructive examination.
(2) Performing nondestructive examination of selected regions and features.
(3) Performing repairs or analysis to determine the permanent or temporary acceptability of defects.
(4) Defining the conditions and lifetime for which the system has been recertified, and the calendar or cyclic interval at which inspections are necessary.
(5) Establishing area requiring repair and recommending repair and/or replacement based on cost effectiveness. In addition, vessels were evaluated in conformance to ASME Boiler and Pressure Vessel Code. Pumps and valves were also analyzed to various conditions, and cost-effective solutions were made for malfunctions.
– Fitness For Service
– (PDF) “Weld Defects and Failures: Quantifying Fitness For Service – How Finite Element Mathematical Simulations can Mitigate Risk, Cut Costs and Improve Overall Safety”
– Publications – Heat Exchangers, Pressure Vessels, Welds and Other Applications, Fatigue, Elevated Temperature