This International Standard specifies the properties of the piping system and its components made from fibre-reinforced cement, based upon Portland cement, intended to be used for drainage or sewerage systems. This International Standard is applicable to fibre-reinforced cement pipes and fittings suitable primarily for use in gravity systems at atmospheric pressure in buried applications. Pipes satisfying the requirements of this International Standard, although exhibiting some flexible characteristics, are intended for installations designed using rigid pipe principles. NOTE 1 In a pipe work system, pipes and fittings of different strength classification can be used together. NOTE 2 Piping systems conforming to this International Standard can be used also for non-buried applications provided the influences of the environment and the supports are considered in the design of the pipes, fittings and joints. NOTE3 This International Standard addresses aspects of long-term performance of pipe (see Annex J). NOTE 4 Purchasers should satisfy themselves that the class of pipe specified on the basis of this International Standard is suitable for its intended application. NOTE 5 Compliance with Annex G of this International Standard might not satisfy national regulatory requirements.