Vitreous and porcelain enamels - Inside and outside enamelled valves and pressure pipe fittings for untreated and potable water supply - Quality requirements and testing (ISO/DIS 11177:2025); German a

This document establishes comprehensive quality requirements and test procedures for enamelled valves and pressure piping accessories used in the supply of unprocessed drinking water and applications involving glass and porcelain enamelling. It specifically addresses components intended for both internal and external use within water distribution systems, ensuring that the enamelled surfaces maintain their integrity and safety standards under operational conditions. The scope covers technical specifications necessary to verify the performance, durability, and reliability of such fittings when exposed to potable water environments. Detailed methodologies for evaluation are included to assess surface quality, adhesion, and resistance to potential degradation. These guidelines support the maintenance of high public health standards by defining the technical criteria that manufacturers and suppliers must meet. The content focuses on the physical and chemical properties of the enamelled layers and the mechanical performance of the associated hardware, providing a unified framework for assessment across relevant industries without referencing specific national or international bodies.