The Milestone Gasket Test Program is part of the Long Range Flanged Joint Improvement Program of the Pressure Vessel Research Committee.In these tests complex load/pressure sequences are used to determine leakage performance and deformation response at room temperature of four types of gaskets: (a) A Spiral-Wound asbestos-filled gasket with an outer compression ring; (b) A Compressed-Asbest's gasket with a rubber binding; (c) A flat stainless-steel Doubled-Jacketed asbestos-filled gasket; and (d) A soft-iron Oval-Ring joint gasket.