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ISO/TS 4699:2022

Hard Coal — Determination of plastometric indices — Manual method

Publication date:   Aug 17, 2022

General information

90.92   Standard to be revised   Feb 2, 2026

ISO

ISO/TC 27/SC 5 Methods of analysis

Technical Specification

73.040   Coals

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Scope

This document specifies a manual method for the determination of plastometric indices. These indices are the maximum thickness of the plastic layer (Y, mm) and the final contraction value (X, mm).
This document is applicable for hard coals with a determined ash level less than 15 % on a dry basis, as described in ISO 11722 and ISO 1171.

Life cycle

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PUBLISHED
ISO/TS 4699:2022
90.92 Standard to be revised
Feb 2, 2026

REVISED BY

IN_DEVELOPMENT
ISO/CD TS 4699