quality is no accident:

Niessing is audited at regular intervals by independent bodies (SLV Duisburg, RAL Quality Association).

The great potential of the well-trained and highly-qualified

staff at Nießing assure a high standard of quality throughout.

Approvals:

• RAL Seal of Quality for steel chimneys, Seal of Quality
  Steel Structural Engineering Quality Association
• Approved specialist welders; major certification of suitability
  in accordance with DIN 18800 Teil 7 and the EUROPEAN WELDING FEDERATION with extension to DIN 4133 and stainless steels. Approved for railway vehicles in accordance
  with DIN 6700 T2 (class C2) for St 37, stainless steel and aluminium.

Niessing is untiring in its efforts through collaboration with technical universities and research institutes to guarantee continuous and successful product development.

Co-operation / memberships:

• Co-operation partner and licensee of the Fraunhofer Institut für Bauphysik in Stuttgart
• Member of the RAL Quality Association for structural steelwork and steel chimneys with independent annual monitoring.
• DEGA — German Acoustics Association e. V.