This document specifies the requirements for product quality and product testing of enamelled valves and pressure pipe fittings for untreated and potable water supply. It is not applicable for chemical service glass-enamel and apparatus enamel. The requirements for product quality and product testing of enamelled valves and pressure pipe fittings for untreated and potable water supply as defined in this document take into account the actual stress conditions to which a component may be subjected during its service life. The standard has been prepared on the basis of the German Environment Agency's Guideline on the hygienic assessment of organic materials in contact with drinking water (KTW guideline). This standard has been prepared by Technical Committee CEN/TC 262 "Metallic and other inorganic coatings", the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 107 "Metallic and other inorganic coatings". The responsible German standardization committee is Working Committee NA 062-01-63 AA "Prüfungen von Emails und Emaillierungen" ("Testing of vitreous and porcelain enamels") at DIN Standards Committee Materials Testing (NMP).