This standard specifies dimensions, masses and technical delivery conditions for pipe plugs which are intended to be screwed into holes with parallel thread as specified in DIN 158-1, DIN 3858, DIN EN ISO 228-1 and DIN ISO 261.
NOTE 1 Since tightness is a function of pressure, temperature, the materials involved and the fluid with which the threaded parts are in contact, such connections cannot be assumed to be tight. Therefore, it is recommended that a sealant or seal ring should be provided, particularly where the hole has a thread as specified in DIN ISO 261.
NOTE 2 For pipe plugs for use in gas and water supply systems, see the Technische Regeln für Gasinstallationen (DVGW-TRGI) (DVGW Codes of practice for gas installations)1) and the Technische Regeln für Trinkwasserinstallationen (TRWI) (Codes of practice for drinking water installations) to DIN 1988-2.
1) Obtainable from ZfGW-Verlag GmbH, Voltastraße 79, 60486 Frankfurt (Main)