533. Conformity assessment.

Pressure equipment1 or an assembly2 which is in conformity with a harmonised standard3 (or part of such a standard) the reference to which has been published in the Official Journal of the European Union, is presumed to be in conformity with the essential safety requirements covered by that standard (or that part of that standard)4. The materials used for the manufacture of pressure equipment or an assembly which are in conformity with a European approval for materials, the reference to which has been published in the Official Journal, are to be presumed to be in conformity with the essential safety requirements applicable to that European approval for materials5