Wastewater treatment plants - Part 11: General data required; German version EN 12255-11:2001
Edition 2001-07

Wastewater treatment plants - Part 6: Activated sludge process; German version EN 12255-6:2002
Edition 2002-04

Wastewater treatment plants - Part 7: Biological fixed-film reactors; German version EN 12255-7:2002
Edition 2002-04

Wastewater treatment plants - Part 13: Chemical treatment; Treatment of wastewater by precipitation/flocculation; German version EN 12255-13:2002
Edition 2003-04

Water quality - Radium-226 - Part 3: Test method using coprecipitation and gamma-spectrometry (ISO 13165-3:2016); German version EN ISO 13165-3:2020
Edition 2020-12

Air quality - Guidelines for estimating measurement uncertainty (ISO 20988:2007); German version EN ISO 20988:2007
Edition 2007-09

Railway applications - Track - Track alignment design parameters - Track gauges 1 435 mm and wider; German version EN 13803:2017
Edition 2017-09

Acoustics - Screens, furniture and single objects intended for interior use - Rating of sound absorption and sound reduction of elements based on laboratory measurements (ISO 20189:2018)
Edition 2020-12

Alpine ski/binding/boot (S-B-B) system - Assembly, adjustment and inspection (ISO 11088:2023)
Edition 2023-08

Chemicals used for treatment of water intended for human consumption - Methanol; German version EN 13177:2010
Edition 2010-08