ISO 12101 bridges the gap between factory testing and real-world emission performance

The interview makes it clear that fugitive emissions from valves are systematically underestimated because existing tests do not sufficiently reflect real-world operating conditions. Colin Zegers explains that many sealing systems pass short production tests in the factory at low pressure and ambient temperature, yet fail when they are exposed for longer periods to fluctuating temperatures, pressure cycles and packing stress relaxation. This results in leaks that only become apparent in service, with direct consequences for safety, environmental impact and regulatory compliance. The problem is compounded because liquid and gas tightness are often misinterpreted, and because test setups and installation conditions are inadequately documented or reproduced. These discrepancies between test and practice are demonstrated through targeted fugitive-emission tests on stem sealing systems.

According to Zegers, ISO 12101 positions itself as the necessary answer to this problem by providing a globally recognised, consistent method for testing and qualifying stem sealing systems. The standard mandates transparency regarding test fixtures, materials, tolerances and conditions so that performance becomes verifiable and comparable for manufacturers, end users and regulators. Zegers’ role as initiator and chair within the ISO process underscores his authority at the intersection of valve testing, inspection and standardisation, and shows how practical standards contribute to lower life-cycle costs, demonstrable compliance and reliable emission control. Anyone wishing to understand why ISO 12101 is a tipping point for valve integrity and emission management will find indispensable technical insights in the full article.