TS EN ISO 20484

TS EN ISO 20484 is a terminology standard for leak testing within the field of non-destructive testing. It brings together the terms and definitions used for leak testing, helping users share a common technical language when discussing leakage assessment, test conditions, equipment, and results. In general technical terms, leak testing is used to evaluate the integrity of a closed volume, component, or system against unwanted fluid passage.

How leak-testing terms are organised

In general engineering practice, leak testing may rely on different principles such as pressure difference, tracer gas methods, vacuum methods, or indirect observation of escaping fluid. Clear terminology matters because small conceptual differences can affect how sealing performance, leak rate, detection sensitivity, and test interpretation are understood. A vocabulary standard helps align these expressions across industries and reduces ambiguity in technical communication.

Why this vocabulary matters in practice

• The standard defines terms used in leak testing.
• It supports a common language within non-destructive testing.
• It helps distinguish related ideas such as leakage, leak rate, and sealing integrity.
• It improves consistency in equipment descriptions, methods, and reporting.

Because this is a vocabulary document, its main value is conceptual clarity rather than prescribing a specific test method. It is especially useful in engineering, quality assurance, and inspection work where the same term must be understood consistently by different teams.