Abstract

An electrically isolating gasket is disclosed wherein a coating layer is disposed on at least one surface, and in some embodiments, on all surfaces, of the disc-shaped core gasket component of the electrically isolating gasket. The core gasket component can be made of a metallic material and may include one or more grooves in each axial surface of the core gasket component. When the core gasket component includes such grooves, the coating can be applied to all surfaces of the grooves as well as all other surfaces of the core gasket component so that the coating encapsulates the core gasket component. The coating layer can be, for example, polyimide, polyamide, ceramic, and aluminum oxide.

IPC Classes  ?

• F16J 15/06 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
• F16L 23/18 - Flanged joints characterised by the sealing means the sealing means being rings
• F16L 25/02 - Construction or details of pipe joints not provided for in, or of interest apart from, groups specially adapted for electrically insulating the two pipe ends of the joint from each other

Abstract

An electrically isolating gasket is disclosed wherein a coating layer is disposed on at least one surface, and in some embodiments, on all surfaces, of the disc-shaped core gasket component of the electrically isolating gasket. The core gasket component can be made of a metallic material and may include one or more grooves in each axial surface of the core gasket component. When the core gasket component includes such grooves, the coating can be applied to all surfaces of the grooves as well as all other surfaces of the core gasket component so that the coating encapsulates the core gasket component. The coating layer can be, for example, polyimide, polyamide, ceramic, and aluminum oxide.

IPC Classes  ?

• F16L 23/18 - Flanged joints characterised by the sealing means the sealing means being rings
• F16J 15/06 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
• F16J 15/12 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
• F16L 25/02 - Construction or details of pipe joints not provided for in, or of interest apart from, groups specially adapted for electrically insulating the two pipe ends of the joint from each other

Abstract

Gasket seals for high pressure applications include retaining elements with inner diameter seal elements that interlock with the retaining element to provide resistance to movement in both axial and radial directions between the retaining element and seal element. High pressure sealing may be accomplished using a metallic core retaining element to which an electrically isolating material is bonded on either or both sides. Sealing is achieved through an inner diameter dielectric sealing element, such as a polytetrafluoroethylene (PTFE) inner diameter sealing ring. Flanges of a joint in a fluid flow ling may be bolted together with the gasket seal interposed therebetween. In the event of pressure changes, the inner diameter seal resists being drawn into the flow line, and resists axial movement relative to the retaining element, through dual locking members that secure the seal to the retaining element.

IPC Classes  ?

• F16J 15/32 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
• F16J 15/3268 - Mounting of sealing rings
• F16J 15/3276 - Mounting of sealing rings with additional static sealing between the sealing, or its casing or support, and the surface on which it is mounted
• F16L 23/16 - Flanged joints characterised by the sealing means
• F16L 23/18 - Flanged joints characterised by the sealing means the sealing means being rings

Abstract

Gasket seals for high pressure applications include retaining elements with inner diameter seal elements that interlock with the retaining element to provide resistance to movement in both axial and radial directions between the retaining element and seal element. High pressure sealing may be accomplished using a metallic core retaining element to which an electrically isolating material is bonded on either or both sides. Sealing is achieved through an inner diameter dielectric sealing element, such as a polytetrafluoroethylene (PTFE) inner diameter sealing ring. Flanges of a joint in a fluid flow ling may be bolted together with the gasket seal interposed therebetween. In the event of pressure changes, the inner diameter seal resists being drawn into the flow line, and resists axial movement relative to the retaining element, through dual locking members that secure the seal to the retaining element.

IPC Classes  ?

• F16L 17/06 - Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between the end surfaces of the pipes or flanges or arranged in recesses in the pipe ends or flanges
• F16L 23/16 - Flanged joints characterised by the sealing means