| <BR> | Medium-weight threaded pipes made of standard structural steel (DIN 17100), which are often used for pipe systems, are made according to the DIN 2440 standard. This standard prescribes certain graduations of nominal width (inside diameter d i ) and certain designations. For this reason, fittings and pipes are only available in the corresponding sizes.
The graduations of nominal diameter also apply for other pipe materials and standardisations.
The standard nominal widths must always adhered to when dimensioning pipelines. Other nominal widths are only available if specially made and are disproportionately expensive.
The following table contains standard graduations in DN (Diameter Nominal) mm and inches, and the most important basic data for pipes according to DIN 2440 : |