This standard specifies the dimensional and minimum quality requirements for pitch-impregnated fibre pipes (known as pitch fibre pipes) of nominal diameter 75 mm, 100 mm and 150 mm, together with pitch fibre fittings and polypropylene and polyethylene couplings, that are suitable, when they have solid walls, for use as cable conduit and when they have perforated walls, for subsoil drainage.
NOTE - Assessment of compliance with the requirements of 4.11.2 for perforated pipes shall be the subject of a special agreement between the manufacturer and the purchaser.