Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings

This technical specification defines the requirements and test methods for manually operated ball valves and closed-bottom gate valves specifically designed for installation in natural gas piping systems within buildings. The scope covers valves intended for use with gaseous fuel under normal operating conditions, addressing critical aspects such as dimensional accuracy, pressure ratings, and leak-tightness. Detailed criteria are established to ensure safety and reliability in domestic and commercial gas distribution networks. The document outlines procedures for verifying material compatibility with the conveyed medium and evaluates the mechanical strength and durability of the valve bodies, seats, and sealing components. Performance tests include checking for gas tightness at various pressure levels, resistance to thermal cycling, and verification of the manual actuation mechanism to prevent unauthorized or accidental operation. By adhering to these provisions, manufacturers can ensure their products meet the necessary safety standards for preventing gas leaks and maintaining system integrity. The guidelines also provide reference data for type testing and production quality control, facilitating interoperability across different regions and ensuring consistent performance in gas infrastructure applications.