1926 Foundation of Kaufffahrtei AG by the stepfather of Knud Hamann, present chairman of the supervisory board

1972 2nd generation of the family establishes Hamann Wassertechnik GmbH
1976 Successful Type Testing for HL-Cont according to IMO MEPC.2 (VI) on board of TS "Maxim Gorkij"
1998 Type Test for Super Mini
2000 Freshwater Plants sold to Lürssen Yards
2004 Knud Hamann establishes HAMANN AG
2006 Ballast Water Treatment Plant SEDNA installed on OOCL Finland
2008 HAMANN receives Type Approval for Ballast Water System SEDNA
Type Test for Sewage Treatment Plant Super Mini PLUS
2009 Type Test for Sewage Treatment Plant HL-Cont PLUS 10