This document specifies the requirements and test methods applicable to factory applied external polyurethane based coatings for heavy duty (see EN 545:2010, Clause D.3) corrosion protection of buried ductile iron pipes in accordance with EN 545, EN 598 and EN 969 for use at operating temperatures up to 50 °C.
This document is not applicable to ductile iron pipes protected with zinc with a finishing layer of polyurethane.
This document is not applicable to special activities on site such as tapping, clamping, etc., which could affect the corrosion protection properties of the polyurethane coating.
NOTE These operations are usually specified in the laying instructions supplied by manufacturers of clamps, house connection saddles, etc. and any relevant user procedures.
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