W. Maass (UK) Ltd are a manufacturer and stockholder of Stainless Steel, Duplex and Superalloy Pipe Flanges, serving the needs of the Oil, Petrochemical and Process related Industries.

Established in 1980 as a subsidiary to Wilhelm Maass GmbH & Co. KG, a leading European forgemaster, W. Maass (UK) Ltd have continually expanded facilities in St. Helens to become one the the UK's market leaders in the production of flanges and related products.