The determination is carried out by pyrolysis of a test portion at 550 °C in nitrogen followd by a calcination in a muffle furnace at 900 °C. The carbon black content is calculated from difference in mass before and after calcination. When so determined the carbon black content in polyethylen pipe material shall be 2,5 0,5 % (m/m).
Status : WithdrawnPublication date : 1986-12
Edition : 1
Technical Committee:General properties of pipes, fittings and valves of plastic materials and their accessories -- Test methods and basic specifications