Prediction of the remaining life of high-temperature/pressure reactors made of Cr-Mo steels
The Cr-Mo steels widely used for pressure vessels have a potential for temper embrittlement. Therefore, embrittlement during long-term service is expected, and it leads to the decrease of the critical flaw size of brittle fracture and/or to the reduction of the remaining life of a pressure vessel. In this paper, the concept of a remaining life prediction model is presented. And also, experimental data on the temper embrittlement and fracture toughness after long-term exposure and subcritical crack growth rate, such as creep crack growth rate, were collected, and the data were analyzed for use in the remaining life prediction model. Examples of the remaining life prediction of a 2 1/4 Cr-1Mo steel hydrogenation reactor and a 1 1/4 Cr-1/2 Mo steel catalytic reforming reactor were calculated from the statistical data base.
- Research Organization:
- Research Laboratory, The Japan Steel Works, Ltd., Muroran
- OSTI ID:
- 6110588
- Journal Information:
- J. Pressure Vessel Technol.; (United States), Journal Name: J. Pressure Vessel Technol.; (United States) Vol. 107:3; ISSN JPVTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
BRITTLENESS
CHEMICAL REACTIONS
CHEMICAL REACTORS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CONTAINERS
CRACK PROPAGATION
CREEP
DATA ANALYSIS
DATA BASE MANAGEMENT
DEFECTS
EMBRITTLEMENT
FORECASTING
FRACTURE PROPERTIES
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
MANAGEMENT
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
PETROLEUM REFINERIES
PRESSURE VESSELS
REFORMER PROCESSES
SERVICE LIFE
STEELS
TEMPERATURE EFFECTS