Explains: - the process of testing for the performance tests; - the benefits of high alumina cement lining; - the definitions of the different types/levels of attestation to enable customers to ensure their requirements are fulfilled; - the ways of certification of conformity with EN 598 for a reliable evaluation of the performance of products; - CE marking and its relevance i.e. the CE mark is not a mark of conformity with a standard but only a self-declaration concerning the CPD essential requirements.