The flat flanges of the ventilation and environmental standard DIN 24154 in series I (part 1) and II (part 2) as well as the rows 3, 4, 5 are galvanized in ST37 raw and ST37 galvanized and delivered in 1.4301 and 1.4571 from stock. Thanks to year-round stock availability, we can ensure very fast delivery times. The flat flanges can be used either as fixed flanges or as loose flanges. Flat flanges in accordiance with DIN 24154 and angle flanges in accordiance with DIN 24155 can be screwed together, if the are from the same series and nominal size. Special sizes and factory standards deviating from the standard table are available on request.