ISO 7991:1987
ISO 7991:1987

ISO 7991:1987

November 1987
International standard Current

Glass — Determination of coefficient of mean linear thermal expansion

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.

View the extract
Main informations

Collections

International ISO standards

Publication date

November 1987

Number of pages

7 p.

Reference

ISO 7991:1987

ICS Codes

81.040.01   Glass in general

Print number

1
Sumary
Glass — Determination of coefficient of mean linear thermal expansion

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.

ZOOM ON ... the Requirements department

To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:

  • mandatory clauses to satisfy,
  • non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document "ISO/IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents" as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!


Need to identify, monitor and decipher standards?