This part of this European Standard specifies requirements for flexibly jointed vitrified clay pipes and fittings with or without sockets for the construction of drainage and sewerage systems. Although normally operated under gravity, the pipes and fittings covered by this Standard will accept periodic hydraulic surcharge.
If pipes are required to withstand continuous working under low pressure, the pressure used in tests in this standard shall be agreed between the manufacturer and the purchaser with a maximum test pressure of 600 kPa (6,0 bar).
The preferred dimensions for pipe lengths, curvature of bends and angles of junction arms are specified in this standard. Other values for these dimensions are acceptable providing the products meet all the relevant performance requirements and are marked correctly.
Fittings groups covered by this part of this standard are given in Table 2 of EN 295-2.
Where this standard provides for different strength classes, different systems of jointing dimensions, different lengths and different fittings, the specifiers/ purchasers may select according to their requirements.