Industrial valves - Butterfly valves of thermoplastics materials

This document establishes specific technical requirements and test methods for butterfly valves manufactured from thermoplastic materials intended for industrial applications. It defines the classification, design criteria, and performance standards necessary to ensure reliability and safety in fluid control systems where corrosive or abrasive media are handled. The scope covers essential aspects such as material selection, pressure ratings, operating temperature limits, and leakage rates, providing a comprehensive framework for manufacturers and users. Detailed specifications address the structural integrity of the valve body, disc, and sealing elements, ensuring compatibility with various piping systems. The standard outlines procedures for hydrostatic pressure testing, cycle testing, and inspection methods to verify dimensional accuracy and operational functionality. By adhering to these guidelines, industry participants can achieve consistent product quality and interoperability across different markets. It serves as a reference for the design, production, and evaluation of thermoplastic butterfly valves, facilitating compliance with broader engineering regulations without limiting the adaptability to specific industrial needs.