2014DIN EN 13555:2014 Flanges and their joints - Gasket parameters and test procedures relevant to the design rules for gasketed circular flange connections; German version EN 13555:2014
2005DIN EN 13555:2005 Flanges and their joints - Gasket parameters and test procedures relevant to the design rules for gasketed circular flange connections; German version EN 13555:2004