Stainless steels fittings for aseptic, chemical and pharmaceutical industry – Tees, elbows and reducers for welding on
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2012

Stainless steels fittings for aseptic, chemical and pharmaceutical industries – Tees, bends, reducers for welding on
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 01/01/2003