EU RO Mutual Recognition Group

General description of the product and definitions

a) Plastic(s) means both thermoplastic and thermosetting plastic materials with or without reinforcement, such as PVC and FRP (fiber reinforced plastics);

b) Plastic includes synthetic rubber and materials of similar thermo/mechanical properties;

c) Pipes/piping systems means those made of plastic and include the pipes, fittings, joints, and any internal or external liners, coverings and coatings required to comply with the performance criteria. Fittings include bends, elbows, fabricated branch pieces, etc. made of plastic materials;

d) Joint means joining pipes by adhesive bonding, laminating, welding, etc.;

e) Fittings include bends, elbows, fabricated branch pieces, etc. made of plastic materials;

f) Nominal pressure is the maximum permissible working pressure which shall be determined in accordance with 2.a.i.1.2 below;

g) Design pressure is the maximum working pressure which is expected under operation conditions or the highest set pressure of any safety valve or pressure relief device on the system, if fitted;

h) Fire endurance is the capability of the piping system to perform its intended function, i.e. maintain its strength and integrity, for some predicted period of time while exposed to fire.