DIN EN 1591-4:2013 Flanges and their joints - Part 4: Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems; German version EN 1591-4:2013
2013DIN EN 1591-4:2013-12 Flanges and their joints - Part 4: Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems; German version EN 1591-4:2013
2013DIN EN 1591-4:2013 Flanges and their joints - Part 4: Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems; German version EN 1591-4:2013
2007DIN CEN/TS 1591-4:2007 Flanges and their joints - Design rules for gasketed circular flange connections - Part 4: Qualification of personnel competency in the assembly of bolted joints fitted to equipment subject to the Pressure Equipment Directive; German version CEN/TS 1591-4