Wilhelm Maass GmbH

Wilhelm Maass GmbH, located in Essen, Germany, is a leading manufacturer of stainless and alloy flanges and serves as the headquarters of the Maass Global Group. The company offers clients flanges from small to large dimensions, combined with varying materials across diverse pressure ranges, backed by a wide range of products and services worldwide.

Types produced include weld necks, slip-ons, threaded, blind, socket weld, lap joint, orifice and reducing flanges as well as flanges made to drawing, to dimensional standards including ASME B16.5, B16.36, B16.47 and B16.48, AWWA and DIN/EN 1092, with capabilities from DN 10 to DN 2200 and PN 6 to PN 400. Recently certified to NORSOK M-650 Rev. 4, the company also holds ISO 9001 and PED certification with approvals from major international operators. Beyond individual flange production, it supports global projects from planning through activation, including ITPs, project management, packaging, client inspections and logistics.