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This document specifies design for recycling guidelines for thermoplastics pipes and fittings, used as construction products or used for water supply to irrigation systems. NOTE 1 Components used in irrigation systems such as flexibles and drip lines are not part of this document. NOTE 2 Pipes and fittings used for cable management are not part of this document. NOTE 3 Packaging of pipes and fittings is not part of this document. The guidelines in this document are developed to facilitate mechanical recycling. NOTE 4 The guidelines could also be beneficial for chemical recycling. Thermoplastics pipes and fittings are considered to be those, where the total volume of the thermoplastic compound/formulation exceeds 50 %. This document can also be used for other thermoplastics products used in a piping system such as manholes, inspection chambers, infiltration boxes and valves.