2014LST EN 1591-1-2014 Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation
2004LST EN 12284-2004 Refrigerating systems and heat pumps - Valves - Requirements, testing and marking
LST EN 12284-2004 Refrigerating systems and heat pumps - Valves - Requirements, testing and marking was changed to LST EN 1591-1-2014 Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation.