TECHNIQUES FOR CREEP TESTING OF INTERNALLY PRESSURIZED TUBULAR COMPONENTS
Numerous standard facilities exist worldwide for determining the uniaxial creep behaviour of materials for elevated temperature applications. However facilities for testing these materials, in the tubular form most commonly used in high temperature process plant, are not only more scarce but they are also of such variation in design and construction that a concept for standardization is presently not apparent. The aim of the paper is to compare and contrast the different technical attributes and methodologies of testing in facilities known to the authors in an attempt to establish in which areas standardization would be appropriate. The technical characteristics of each facility are described with particular emphasis on the size and shape of tubular component which can be accommodated; the heating and temperature control system; the pressurizing system and the test environment; the potential for applying superimposed (tensile, torsional, thermal) stress; methods for assessing the creep deformation; and, finally, safety requirements. In addition to this description of existing facilities, supplementary information is presented concerning recent developments including novel techniques considered to be of some potential interest. The paper concludes with a proposal covering areas both presently ripe for standardization and those where urgent interlaboratory discussions could well lead to convergance in conformity of approach and eventual standardization.
Bibliographic Reference: TECHNIQUES FOR MULTIAXIAL CREEP TESTING, LEATHERHEAD (UK), SEPT. 25-26, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32296 ORA
Availability: Can be ordered online
Record Number: 1989124017500 / Last updated on: 1987-01-01
Available languages: en