Industrial valves - Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems - PN and Class designated valves

This document establishes the butt welding dimensions for metallic valves equipped with flanged connections intended for use within flanged piping systems. It specifically covers valves designed for operation under general pressure conditions and specified rating classes, ensuring compatibility and interchangeability across different components in industrial fluid handling applications. The scope of the technical specification addresses the geometric parameters required to facilitate proper alignment and sealing during the installation of such valves into existing or new pipeline networks. By defining precise dimensional requirements, the text aims to harmonize manufacturing practices and installation procedures among manufacturers and engineering professionals operating in similar regulatory environments. Adherence to these specifications supports the integrity of the piping system by minimizing discrepancies that could lead to leakage or mechanical failure. The document serves as a reference for the design, production, and quality assurance of metal valves, facilitating smooth integration into broader industrial infrastructure projects without requiring custom modifications for connection interfaces.