Description

The determination is carried out by pyrolysis of a test portion at 550°C in nitrogen followed 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 polyolefin pipe material shall be 2.5 to 0.5 % (m/m).

Scope

This International Standard specifies a test method for the determination of the carbon black content of polyolefin compositions used in particular for the manufacture of pipes and fittings, and provides a basic specification for polyethylene pipes and fittings.

This International Standard applies equally to the material for manufacture and to any material taken from a pipe or fitting.