ISO 1018:2019 Hard coal一Determination of moisture-holding capacity

ISO 1018:2019 Hard coal一Determination of moisture-holding capacity. This document gives reference to ASTM D1412 as a method of determining the moisture-holding capacity of hard coals. 2 Normative references The following documents are referred to in the text in such a way that some or all ol their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ASTM D1412, Standard Test Met hod for Equilibrium Moisture of Coal at 96 to 97 Percent Relative Humidity and 30°C 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.oig/obp — IEC Electropedia: available at http://www.electropedia.org/ 4 Sampling Samples should be collected following the specifications given in ISO 13909, ISO 14180 or ISO 18283, as applicable. 5 Principle The method is specified for wetted and unwetted coal. Coal is wetted by immersing in water and the subsequent removal of excess water. The coal is brought to equilibrium over a saturated solution of potassium sulfate at 30 °C. The conditioning of the coal is carried out under reduced pressure. Afterwards, the sample is dried to constant mass at 105 °C. The moisture-holding capacity is reported as per cent mass fraction of the conditioned moist coal. All the related equipment requirements, sample preparation, test procedure and reporting shall be in accordance with ASTM D 1412. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www,isoorg/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation of the voluntary...