LST EN 12560-4-2002 Flanges and their joints - Gaskets for Class-designated flantes - Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges
2002LST EN 12560-4-2002 Flanges and their joints - Gaskets for Class-designated flantes - Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges