The article highlights the importance of post-production purification in maintaining the quality of industrial gases throughout the supply chain. With industries such as electronics and aerospace requiring high- or ultra-high-purity gases, there is a growing demand for purification to meet stringent customer requirements and enhance the commercial value of the products. Purification is essential in various stages of the gas supply chain to ensure consistent purity, especially in sensitive applications. For hydrogen, high purity levels are critical for applications like flat glass production and fuel cells, leading to the development of purification technology to comply with regulations such as the SAE J2719 standard. Furthermore, purification plays a key role in the Power-to-X systems for green hydrogen production, ensuring stable gas quality despite fluctuations in production. Advances in purification technology have also focused on minimizing gas losses and inefficiencies, with modern systems achieving significantly lower volume loss. Beyond hydrogen, gases like argon and helium are also experiencing a rise in demand for high purity due to their use in various industries. The article emphasizes the importance of recycling in industrial gases and how evolving regulations are shaping the drive for gas purification to meet environmental standards.