NF E29-201-4*NF EN 1759-4:2004 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, class designated - Part 4 : aluminium alloy flanges
2004NF E29-201-4*NF EN 1759-4:2004 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, class designated - Part 4 : aluminium alloy flanges