Gasket for flange connections

US6962349B2 · kind B2 · utility

Assignee

• SGL Carbon AG · DE

Inventors

• Wolfgang Notter · Essen, DE
• Alois Baumann · Rain, DE
• Oswin Öttinger · Meitingen, DE
• Heiko Leinfelder · Nördlingen, DE
• Martin Reinthaler · Neuss, DE
• Silvia Mechen · Meitingen, DE
• Jürgen Bacher · Wertingen, DE

Key dates

• Filing date: Apr 6, 2004
• Grant date: Nov 8, 2005
• Expiry date: Apr 6, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2581/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A flat gasket for flange connections has a leakage rate below the limit value of 1*10−5 kPa*1/(s*m). The gasket assembly has a thick, areal, pressure-resistant core formed from at least one layer of graphite foil with a base weight of at most 1500 g/m2, or a multilayer sandwich of such graphite foils and metal interlayers. The core is embedded between two metal foils, and the surfaces that are remote from the core are covered by covering layers of graphite foil with a base weight of at most 350 g/m2. A ratio of the base weight of the graphite foil of the covering layers to the base weight of the graphite foil of the core lies between 1:3 and 1:7.