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DIN EN 12255-13
Wastewater treatment plants - Part 13: Chemical treatment - Treatment of wastewater by precipitation/flocculation; German version EN 12255-13:2023
DIN EN 12255-14
Wastewater treatment plants - Part 14: Disinfection; German version EN 12255-14:2023
DIN EN 12255-15 rev
Wastewater treatment plants - Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants
DIN EN 12255-16
Wastewater treatment plants - Part 16: Physical (mechanical) filtration; German version EN 12255-16:2021
DIN EN 12258-1
Aluminium and aluminium alloys - Terms and definitions - Part 1: General terms; Trilingual version prEN 12258-1:2026
DIN EN 12259-12/A1
Fixed firefighting systems - Components for sprinkler and water spray systems - Part 12: Pumps - Amendment A1; German and English version EN 12259-12:2023/prA1:2025
DIN EN 12266-1
Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements; German and English version prEN 12266-1:2025
DIN EN 12272-2 rev
Surface dressing - Test methods - Part 2: Visual assessment of defects
DIN EN 12272-4
Surface dressing - Test methods - Part 4: Calibration of binder sprayer on stationary bench
DIN EN 12274-8 rev
Slurry surfacing - Test methods - Part 8: Visual assessment of defects
