WTS designs and manufactures ready-to-use stainless steel storage tanks for demineralised (DM) and deionised (DI) water systems used in hydrogen production facilities. Available in capacities of up to 500 m³ and diameters of up to 6 metres, the tanks are engineered to preserve water quality and support the reliable operation of PEM and alkaline electrolysers. As a critical part of the balance-of-plant system, high-purity water storage must minimise contamination risk between water treatment, storage and consumption.

Our tanks are designed around project-specific water quality requirements, storage volumes, installation arrangements and interfaces with associated treatment systems. Fabrication scope can include high-quality internal finishes, controlled stainless steel welding, customised instrumentation, insulation systems and process connections tailored to the application.

The tanks can be integrated into complete water-treatment and hydrogen-production systems, supporting EPC contractors, electrolyser OEMs, technology providers and system integrators. Typical applications include green hydrogen production plants, electrolyser skids and other industrial facilities requiring controlled storage of high-purity process water.

Large stainless steel tanks are widely used for the storage of demineralised and deionised water because they combine mechanical strength, corrosion resistance and long-term cleanliness. For large storage volumes, stainless steel provides a robust and reliable solution that helps maintain water quality throughout the service life of the facility. WTS applies proven stainless steel fabrication practices to deliver tanks capable of supporting the demanding purity requirements of modern hydrogen production plants.