The standard applies to pad-type flanges on pressure vessels and pressurized equipment made of unalloyed steels, stainless steels and unalloyed steels with claddings of stainless steels, with nominal sizes DN 15 to DN 500, connecting dimensions in accordance with DIN EN 1092-1, pressure ratings PN 10 to PN 40.
DIN 28117:2003 history
2016DIN 28117:2016-08 Block flanges for process apparatus - Connecting dimensions PN 10 to PN 40
2016DIN 28117:2016 Block flanges for process apparatus - Connecting dimensions PN 10 to PN 40