BS EN 295-5:2013 Vitrified clay pipe systems for drains and sewers. Part 5: Requirements for perforated pipes and fittings

This European Standard specifies requirements for perforated pipes and compatible fittings made from vitrified clay with or without sockets for use in land drains and drainage of waste tips. They are also used for percolation into the ground.
This standard specifies different strength classes and areas of perforations.