DIN_909相关标准规范

UDC621.882.219:621.882.211January 1992DINHexagon head pipe plugs909VerschluBschrauben mit AuBensechskant:kegeliges Gewinde:SupersedesJune 1983 editionIn keeping with current practice in standards published by the International Organization for Standardization (ISO),a commahas been used throughout as the decimal marker.Dimensions in mm1 Scope and field of applicationThis standard specifies dimensions and technical delivery conditions for pipe plugs which are intendedto be screwed into holes with parallel thread as specified in DIN 13 Part 12,DIN 158,DIN 3858 orISO 228 Part 1.Since tightness is a function of pressure,temperature,the materials involved and thefluid with which the threaded parts are in contact,such connections cannot be assumed to be tightTherefore,it is recommended that a sealant or seal ring should be provided where the hole has a threadas specified in DIN 13 Part 12.Note.For pipe plugs for use in gas and water supply systems,see Technische Regeln fuir Gasinstallatio-nen (DVGW Code of practice for gas supply installations))and DIN 1988 Part 2.2 Dimensions and designationPlugs with d up to 18 mmPlugs with d equal to 20 mm or moreFor plugs produced by turning.Dimension may be up tocentre point with a maximum0,25 mm greaterdiameter equal to /d2 permittedCylindrical459shoulder orrounding to amaximumradius of0.8mmTaper (as a result ofpermittedmanufacturing process)permitted10oRecess (as a result ofmanufacturing process)permittedOther dimensions and detailsas for left-hand figure.Screw thread chamfered tominor thread diameterDesignation of an M 20 x 1.5 steel (St)pipe plug:Pipe plug DIN 909 M20X 1,5-StDesignation of an R1/2 steel(St)pipe plug:Pipe plug DIN 909-R1-St1)Obtainable from ZfGW-Verlag GmbH,VoltastraBe 79,D-6000 Frankfurt (Main)90.Continued on pages 2 and 3125