Experiences with new European standards for calculation of flanged joints including necessary gasket factors
- GKN Gemeinschaftskernkraftwerk Neckar, Neckarwestheim (Germany)
- Univ. Stuttgart (Germany). MPA Staatliche Materialpruefungsanstalt
- AMTEC Advanced Measurements, Leinfelden (Germany)
The correct function of a flanged joint in a given construction (flanges, bolts) and with given loads (pressure, temperature, additional forces) depends on the following: (1) choice of the gasket for the operation environment; (2) determination of the gasket stress for assembly conditions; and (3) gasket stress in operation, i.e., the conditions when leakage has to be minimized. For the correct choice of a gasket it is necessary to have gasket factors available, as given by DIN 28090 (Sept. 95) together with the test procedures. These gasket factors determine the tightening characteristics as well as the deformation capability of the gaskets. Furthermore, these gasket factors must be available for use in calculations. On the basis of calculations a stress analysis (i.e. a limitation of the stresses in flanges and bolts) must be possible as well as the determination of the bolt forces for the assembly state and of the gasket stress for operating conditions. This is one of the goals of the standard pr DIN EN 1591. The paper first introduces the actual European standards. Calculations are reviewed using test data from special test rigs and from real flanged joints. The calculations were made according to DIN 2505 (initial German standard for flanged joints) and pr DIN EN 1591. Additionally, 2D and 3D Finite Element analysis calculations were performed.
- OSTI ID:
- 404148
- Report Number(s):
- CONF-960706--; ISBN 0-7918-1773-3
- Country of Publication:
- United States
- Language:
- English
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