# ISO 20904:2006 — Withdrawn and superseded ISO standards

For ISO 20904:2006, item title is Hard coal — Sampling of  slurries; status code is 9599; successor is ISO 20904:2020; withdrawn / published date is 2006-10-12, recorded from its source on 2026-08-05.

- **Identifier:** ISO 20904:2006 _(verified: appears in the quote below)_
- **Item title:** Hard coal — Sampling of  slurries _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 20904:2020
- **Withdrawn / published date:** 2006-10-12 _(verified: appears in the quote below)_

## What the source says

> 39992,IS,,ISO 20904:2006,Hard coal — Sampling of slurries,Houille — Échantillonnage des schlamms,2006-10-12,1,['73.040'],ISO/TC 27/SC 4,9599,,[75343],['en'],35,"<p>ISO 20904:2006 sets out the basic methods for sampling fine coal, coal rejects or tailings of nominal top size &lt; 4 mm that is mixed with water to form a slurry. At very high ratios of fine solids to water when the material assumes a soft plastic form, the mixture is correctly termed a paste. Sampling of pastes is not covered in ISO 20904:2006.</p><p>The procedures described in ISO 20904:2006 primarily apply to sampling of coal that is transported in moving streams as a slurry. These streams can fall freely or be confined in pi

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).