BS 7243-1:1989

National foreword
Committees responsible
Methods
1 Scope
2 Normative references
3 Definitions
4 General rules
5 Sampling and sample preparation
6 Composition and number of laboratory samples and
     test portions for analysis
7 Precision of the determination of a property
8 Example
Annex
A Methods for taking increments
Tables
1 Minimum mass of increment depending on the maximum
     grain size
2 Minimum number of increments and sampling precision
3 Variation class depending on the selected oxide
Figures
1 Examples of a sampling scheme
A.1 Examples of sampling from wagons

Methods and conditions of sampling, in order to reduce mean values for a consignment and intervals of sampling.

This part of ISO 8656 specifies methods and conditions of sampling for raw materials and prepared unshaped refractory products, in order to indicate the mean values of a consignment and the interval of sampling.

It does not apply to products in the form of large static quantities or cargoes from which reliable samples cannot be taken.

The type of sampling equipment, and the preparation and reduction of the samples, which should not alter the properties to be tested, are to be agreed between the interested parties.

NOTE Difficulties may be encountered when sampling certain types of unshaped products, for example mouldables.