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ISO 7991:1987

Glass — Determination of coefficient of mean linear thermal expansion ISO 7991:1987

Publication date:   Nov 26, 1987

General information

90.93   Standard confirmed   Mar 5, 2026

ISO

ISO/TC 48/SC 7

International Standard

81.040.01   Glass in general

Buying

Published

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Scope

The method deals with the measurement of the change of length of a glass fibre under specified conditions. The apparatus including the used dilatometers and the possibilities of corretion, the formulae for the final length and the expansion coefficient are specified. In the annex, devices for self-adjusting alignment of specimen and push-rod axis are described and illustrated.

Life cycle

NOW

PUBLISHED
ISO 7991:1987
90.93 Standard confirmed
Mar 5, 2026




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