ISO 1953:2025 PDF

Coal — Size analysis by sieving

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Title (English):

ISO 1953:2025

Coal — Size analysis by sieving

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 15
Publication date:: October 2, 2025
Edition:: ISO IS 1953 edition 4 version 1
ICS:: 73.040

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Description (English):

This document specifies reference methods for the size analysis of coal by manual sieving (wet or dry), using test sieves of aperture sizes between 90 mm and 45 μm. A guide to sampling is given in Annex A. This document is applicable to all coals. It is not applicable to coke. In the case of pulverized coal which has been ground so that a high proportion passes through the test sieve of the smallest aperture size, the methods of this document determine only the mass fraction oversize expressed as a percent.

Technical details

Technical committee: ISO/TC 27/SC 1 - Coal preparation: Terminology and performance
SKU: ISO 1953:2025

Abstract

Overview

ISO 1953:2025 - "Coal - Size analysis by sieving" - is an international reference method for determining the particle-size distribution of coal by manual sieving, either dry or wet, using test sieves with apertures from 90 mm down to 45 μm. The standard specifies sampling guidance (Annex A), apparatus, preparation and division of test samples, sieving procedures, result expression and reporting. It applies to all coals (but not to coke) and, for pulverized coal that mostly passes the smallest sieve, specifies determination of the oversize mass fraction only.

Key technical topics and requirements

Scope and applicability: Manual sieving methods for coals; wet and dry sieving; sieves with aperture sizes between 90 mm and 45 μm. Not applicable to coke.
Apparatus and sieve series: Recommended sieve series (e.g., 125, 90, 75, 63, 50, 45, 31.5, 22.4 mm … down to 45 μm); sieves ≤ 4 mm should be metal wire cloth; alternatives for square- or round-holed screens per ISO 3310-1/2.
Sampling and sample preparation: Gross sample taken per ISO 13909‑2 or ISO 18283; minimum gross/test sample masses are defined (see Table 1) to achieve target precisions (1 % or 2 %). Special division procedures for wet coal

Related standards

Standards mentioned in the description

ISO 1953:2025 PDF

Technical details

Abstract

Overview

Key technical topics and requirements

Related standards

Abstract

Overview

Key technical topics and requirements

Related standards

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