EN 13523 deals with methods of testing organic coatings on pre-painted sheets. This part of EN 13523 specifies the scope of all parts of EN 13523, gives definitions common to all parts and describes how to carry out sampling and specimen preparation for most test methods.
NF T37-001-0:2014 Referenced Document
EN 13523 Coil coated metals - Test methods - Part 9: Resistance to water immersion
EN 23270 Paints and Varnishes and Their Raw Materials - Temperatures and Humidities for Conditioning and Testing