DS EN 12560-3:2001
DS EN 12560-3:2001 Flanges And Their Joints - Gaskets For Class-Designated Flanges - Part 3: Non-Metallic Ptfe Envelope Gaskets Defines the dimensions and marking of IBC (inside bolt circle) non-metallic PTFE envelope gaskets for use with flanges complying with prEN 1759-1:2000, prEN 1759-3:1994 and EN 1759-4:1997 for Class 15