Coal assay heating value is based on the moisture content as mined, but without any free water. The ISO has a coal ranking system that also ranks coals; the sub-divisions do not align with the ASTM standard. "Coal Analytical Methods" Blackwell Scientific Press, 1984. Coal assay Coal analysis techniques are specific analytical methods designed to measure the particular physical and chemical properties of coals. These methods are used primarily to determine the suitability of coal for coking, power generation or for iron ore smelting in the manufacture of steel. Coal comes in four main types or ranks: lignite or brown coal, bituminous
J & A Brown South Wales. From that time the surviving member of the Brown family Stephen Brown served as a director in the new public company. In 1960, JABAS merged with Caledonian Collieries Limited to form Coal & Allied Industries Limited. After this merger, JABAS become the subsidiary company that carried out the mining operations of Coal & Allied until being renamed Coal & Allied Operations Pty Ltd in 1980. As of 2013, Coal & Allied Operations Pty Ltd is a subsidiary of Rio Tinto Coal Australia. J & A Brown J & A Brown was an privately owned Australian coal family firm