Remaining life assessment of superheater and reheater tubes: Final report

Technical Report · Sun May 01 04:00:00 EDT 1988

OSTI ID:7243233

Paterson, S R; Rettig, T W

The purpose of this project was to provide a validated procedure in the form of a computer code and users guide for predicting the remaining useful life of Type SA213-T22 superheater and reheater tubes. The procedure was to be based on steamside oxide scale measurements, tube geometry measurements, and other readily available operating parameters. To achieve this objective, six tasks were performed. These were: (1) acquisition and compilation of oxide growth information for 2/1/4/Cr--1Mo steel, (2) acquisition and examination of Type SA213-T22 superheater and reheater tubes taken out of service after considerable service exposure or after the tube ruptured, (3) empirical development of a creep damage accumulation procedure which is accurate for nonsteady state temperature and stress histories, (4) measurement of the steamside scale thickening and fireside wastage rates in tubes removed from service, (5) integration of the foregoing tasks into damage counting algorithms and casting these into a user-friendly computer code, and (6) comparison of the remaining life predictions made using the developed computer code with well characterized tube failures and with postexposure stress rupture test results obtained from a nonruptured service degraded tube. A user-oriented computer code for predicting the remaining life of superheater and reheater tubes using easily measured tube characteristics and readily available operational data were developed. This report provides the technical basis and background for this computer code. 60 figs., 11

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA)
• OSTI ID: 7243233
• Report Number(s): EPRI-CS-5564; ON: TI88011532
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
CHEMICAL REACTIONS
COMPUTER CODES
CREEP
DOCUMENT TYPES
FAILURES
MECHANICAL PROPERTIES
OXIDATION
PROGRESS REPORT
RUPTURES
SERVICE LIFE
SUPERHEATERS
T CODES
TUBES