Industrial-process control valves. Part 4 : Inspection and routine testing

This technical document establishes the fundamental procedures for the inspection and routine testing of valves designed for use in industrial process control applications. It outlines specific methods to verify the conformity of valve products against established design and manufacturing requirements prior to delivery. The document covers essential test conditions, acceptance criteria, and detailed instructions for conducting performance evaluations under various operational parameters. It serves as a reference for manufacturers and users to ensure that valves operate reliably and safely within industrial environments. The guidelines address aspects such as leakage testing, mechanical endurance, and functional verification under simulated service conditions. By adhering to these prescribed protocols, stakeholders can consistently validate the quality and integrity of control valve assemblies. The standard provides a framework for documenting test results and maintaining traceability throughout the manufacturing and installation phases. This approach facilitates uniformity in quality assurance practices across different regions and manufacturers, supporting the overall reliability of process control systems without prescribing specific product designs or performance targets.