EVALUATION OF LIMIT STOP USER INPUT ERRORS IN PIPING FLEXIBILITY ANALYSES

摘要

Flexibility analysis software is most frequently used for the design of piping systems, incorporating required piping and support specifications and demonstrating compliance with specified code criteria. After a piping system has been constructed and has been operating for several months, it is not uncommon for the piping system to behave significantly different than expected from the as-designed stress analysis. Field anomalies identified during hot and cold walkdowns may include serious problems such as topped out or bottomed out hangers. This paper discusses the modeling of abnormal field conditions, providing strategies to avoid user errors associated with transitioning from as-designed to as-found piping system behaviors.