Standard Practice for Compression versus Load Properties of Gasket Materials

Importancia y uso:

5.1 The load versus thickness properties of a gasket material are an important factor with regard to the selection of a given material for use in a particular sealing application. Additionally, compression/load behavior data are a common request from users. The test allows comparison of materials at room temperature or elevated temperatures or both. Additionally, properties can be evaluated while loading and unloading the material at room temperature or elevated temperatures or both. The significance of the test method is based, in part, on the assumption that, if a material exhibits too much compression at either room temperatures or elevated temperatures, it will no longer function as effectively as a seal. The results may be used in certain flange design methods to characterize properties for design such as finite element analysis (FEA). The results may be used to confirm adequate assembly loading based on measured gasket compression in the field. Two or more materials can be compared to determine differences in their compression properties. A sample of material can be compared to an established standard or previously determined characteristics on original lots of the same material for quality assurance purposes.

5.2 If desired, samples may be tested with a raised profile flange, insert, or calibration ring described in 6.3 and Fig. 1 so that the area (2042 mm² [3.18 in.²]) remains constant during the test.

Subcomité:

F03.20

Volúmen:

09.02

Número ICS:

23.100.60 (Filters, seals and contamination of fluids)

Palabras clave:

compression; gasket; gasket compression; load versus thickness; strain; stress; stress-strain; thickness change;