ISO 7991:1987

Glass — Determination of coefficient of mean linear thermal expansion

Publication date: 26 nën 1987

General information

Current stage: 90.93 Effective date: 5 mar 2026

Originator: ISO

Owner: ISO/TC 48/SC 7

Type: International Standard

ICS: 81.040.01

Gjuha: anglisht

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Statusi: Publikuar

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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
5 mar 2026

National adoptions

SSH ISO 7991:2002

DPS

Qelqi - Përcaktimi i koeficientit të shtrirjes lineare mesatare

60.60 Standard published

DPS/KT 129 më tepër