NF E29-201-3*NF EN 1759-3:2004 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class designated - Part 3 : copper alloy flanges
2004NF E29-201-3*NF EN 1759-3:2004 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class designated - Part 3 : copper alloy flanges