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Round flat flanges for general ventilation purposes according to standard EN 12220 correspond in part to those of standard DIN 24154, series I.
The delivery is made either from free stock or from new production.
The flat flanges of the ventilation and environmental standards in Series I (Part 1), II (Part 2), and Series 3, 4, 5 are supplied in the St37 2 materials (raw and galvanized), 1.4301 and 1.4571 , Ventilation flanges, round flanges).
Designs made of other materials are made to order.
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.