EN 1092-1 FLANGE

EN 1092-1 is a European standard that specifies the requirements for flanges used in piping systems. This standard covers a range of flange types, materials, and dimensions suitable for various applications. Here's a comprehensive overview of EN 1092-1:EN 1092-1 OverviewEN 1092-1 is titled "Flanges and their joints - Flanges - Part 1: Steel flanges" and is commonly used for steel flanges. The standard specifies the dimensions, pressure-temperature ratings, materials, and other key characteristics of flanges.Types of Flanges CoveredEN 1092-1 includes several types of flanges:Weld Neck Flanges (WN)Designed to be welded to the pipe.Provides a smooth transition between the pipe and the flange, minimizing stress concentrations.Slip-On Flanges (SO)Slip over the pipe and are welded both inside and outside.Typically used for lower pressure and temperature applications.Blind Flanges (BL)Used to close the end of a pipe or a valve.Provides a seal to contain pressure within the system.Threaded Flanges (TH)Have internal threads that match the external threads of the pipe.Used where welding is not feasible.Socket Weld Flanges (SW)The pipe is inserted into the flange and then welded around the socket.Suitable for high-pressure applications.Pressure-Temperature RatingsFlanges are classified according to their pressure-temperature ratings, which are designated by pressure classes. Common pressure classes in EN 1092-1 include:PN 6PN 10PN 16PN 25PN 40PN 63PN 100PN 160Each class specifies the maximum pressure the flange can handle at a given temperature.DimensionsEN 1092-1 defines detailed dimensions for each flange type and size. Key dimensions include:Nominal Diameter (DN): The flange size, typically ranging from DN 10 (1/2 inch) to DN 600 (24 inches) and beyond.Bolt Circle Diameter (BCD): The diameter of the circle that the bolt holes are drilled into.Number of Bolts: The number of bolt holes varies by size and pressure class.Bolt Hole Diameter: The diameter of the holes for bolts.Flange Thickness: The thickness of the flange varies by size and pressure class.Raised Face (RF): The height of the raised face, if applicable.Material SpecificationsEN 1092-1 specifies several materials for flanges, including:Carbon Steel: EN 10216-2, EN 10210Stainless Steel: EN 10088-1, EN 10088-2Alloy Steel: EN 10216-5Ductile Iron: EN 1563Flange Face TypesEN 1092-1 specifies different flange face types:Raised Face (RF)Flat Face (FF)Ring-Type Joint (RTJ)Each type has different characteristics and is suitable for various applications.Flange Designations and ExamplesEN 1092-1 designates flanges with a combination of nominal diameter, pressure class, and type. For example:DN 50 PN 16 SO: Slip-On Flange with a nominal diameter of 50 mm and pressure class PN 16.DN 100 PN 40 BL: Blind Flange with a nominal diameter of 100 mm and pressure class PN 40.Equivalent Standards and ReferencesEN 1092-1 is widely used in Europe and has some equivalent standards internationally:ISO 7005-1: Flanges and their joints - Part 1: Steel flangesASME B16.5: Flanges and flanged fittingsAPI 605: Large diameter steel flangesSummary of Key SpecificationsTypes: Weld Neck, Slip-On, Blind, Threaded, Socket WeldPressure Classes: PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160Materials: Carbon Steel, Stainless Steel, Alloy Steel, Ductile IronDimensions: Detailed dimensions for each type and sizeFlange Faces: Raised Face, Flat Face, Ring-Type JointEN 1092-1 provides a comprehensive specification for flanges used in various industrial applications, ensuring compatibility, reliability, and safety. Always refer to the latest edition of the standard and consult with suppliers or engineers for specific requirements and applications.