# ISO 647:1974 — Withdrawn and superseded ISO standards

For ISO 647:1974, item title is Brown coals and lignites — Determination of the yields of tar, water, gas and coke residue by low temperature distillation; status code is 9599; successor is ISO 647:2017; withdrawn / published date is 1974-11-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 647:1974 _(verified: appears in the quote below)_
- **Item title:** Brown coals and lignites — Determination of the yields of tar, water, gas and coke residue by low temperature distillation _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 647:2017
- **Withdrawn / published date:** 1974-11-01 _(verified: appears in the quote below)_

## What the source says

> 4778,IS,,ISO 647:1974,"Brown coals and lignites — Determination of the yields of tar, water, gas and coke residue by low temperature distillation","Charbons bruns et lignites — Détermination des rendements en goudron, en eau, en gaz et en résidu de coke par distillation à basse température",1974-11-01,1,['73.040'],ISO/TC 27/SC 5,9599,,[70840],"['en','fr']",6,"<p>The sample is heated in an aluminium retort to a temperatur of 520 °C. The products of decomposition pass into a water-cooled receiver; the tar and water are condensed while gaseous products pass to atmosphere. The coke residue and the receiver and its contents are weighed. The mass of tar is obtained by difference to the mass of wat

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).