Evaluation of components on a ductwork system at elevated temperatures

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:176092

Shen, J K; Chern, C Y ^[1]

---

1. Bechtel Corp., San Francisco, CA (United States)

This paper evaluates the adequacy of a Deactivation Furnace System (DFS) for operation at elevated temperatures (from 1,100 F to 1,800 F). The piping components included in this evaluation are ductwork, flanges, expansion joints, duct support structures, bolts and other load bearing elements. The DFS is designed in accordance with ANSI/ASME B31.1 and B31.3 Codes. However, for the evaluations of elevated temperature conditions, ASME III Code Case N-253-6, Construction of Class 2 or Class 3 components for Elevated Temperature Service, and Code Case N-47-28, Class 1 components in Elevated Temperature Service, are used. To consider creep effects, the primary membrane stresses of piping components are calculated and compared with the stress to rupture based on the duration of operation temperature. The primary-membrane-plus-bending stresses are calculated to determine the use-fraction sum due to service loadings. If the calculated use-fraction sum of a component should exceed the allowable, the limited useful life could be predicted.

• OSTI ID: 176092
• Report Number(s): CONF-950740--; ISBN 0-7918-1346-0
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BUILDING CODES
CALCULATION METHODS
CHEMICAL WASTES
COMBUSTION
CYCLONE COMBUSTORS
DESIGN
FASTENERS
FUEL FEEDING SYSTEMS
MATERIALS
NUMERICAL DATA
PIPE JOINTS
PIPES
STRESS ANALYSIS
SUPPORTS
WASTE PROCESSING PLANTS