Dichtstellen

Dichtstellen are points, joints, or interfaces in technical systems where a seal is provided to prevent the passage of liquids, gases, or vapors. They occur wherever two components meet or where openings are closed, such as flange connections, valve housings, lids, access doors, weld seams, and penetrations through walls or shells. In practice, a Dichtstelle may consist of a gasket, an O-ring, a mechanical seal, a welded joint, or a sealant, depending on the application, operating pressure, temperature, and the properties of the contained medium.

In engineering, the choice and design of a Dichtstelle depend on several factors, including the chemical compatibility of the sealing material, surface finish, allowable deformation, and the mechanical loads the joint must withstand. Common sealing methods include static seals (gaskets and O-rings in flanges and lids) and dynamic seals (rotating or reciprocating components). Proper installation, surface cleanliness, correct torques, and aligned assembly are essential to achieve and maintain tightness.

Testing and maintenance are integral to Dichtstellen. Tightness tests such as pressure or vacuum tests, helium leak testing, or bubble tests are used to verify performance after assembly or maintenance. Regular inspection is required to detect wear, corrosion, relaxation of gaskets, or damage to seals. Standards and specifications in industries like chemical processing, oil and gas, and shipbuilding guide acceptable materials, testing methods, and maintenance intervals.

See also: sealing, gasket, O-ring, flange, leak testing, Dichtheit.