DIN 28030-1:2013-09

This standard applies to flanges on process apparatus which are used as main flanges, i.e. for separable agitator vessels, platoons, heat exchangers or for flanges for manhole closures. These flanges are graded by nominal diameters for process apparatus according to DIN 28105. The standard does not apply to piping and armature connections. Flanges for pipes according to DIN EN 1092-1 are usually used on process apparatus only for for piping connections and other connections (i.e. adaptors and armatures). Flanges for process apparatus are smaller in their flange connection sizes than flanges for piping according to DIN EN 1092-1 and can not be combined with them.