NF E29-901-4*NF EN 12560-4:2001 Flanges and their joints - Gaskets for Class-designated flanges - Part 4 : corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges
2001NF E29-901-4*NF EN 12560-4:2001 Flanges and their joints - Gaskets for Class-designated flanges - Part 4 : corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges