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Key points regarding EN 1092-1 flanges


EN 1092-1 is a European standard for pipe flanges, gaskets, and flanged fittings. Specifically, it covers the requirements for circular steel flanges in various pressure ratings and sizes. The full title of the standard is "Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges."

Here are some key points regarding EN 1092-1 flanges:

1. Pressure Designations (PN): The standard uses a Pressure Nominal (PN) designation to indicate the pressure rating of the flanges. The PN rating corresponds to the maximum allowable pressure at a specified temperature. Common PN ratings include PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160.

2. Flange Types: EN 1092-1 covers various types of flanges, including:

  - Welding Neck Flanges (Type 11)

  - Plate Flanges (Type 01)

  - Slip-On Flanges (Type 02)

  - Blind Flanges (Type 05)

  - Threaded Flanges (Type 13)

  - Lap Joint Flanges (Type 04)

3. Materials: The standard specifies the materials for the flanges, which may include carbon steel, stainless steel, alloy steel, and other materials suitable for the intended application.

4. Dimensions: EN 1092-1 provides detailed dimensions for the flanges, including the outer diameter, bolt circle diameter, bolt hole diameter, thickness, and other relevant dimensions.

5. Facings: The standard covers different facing types for flanges, including flat face (FF), raised face (RF), and ring-type joint (RTJ). The facing type depends on the sealing requirements of the application.

6. Marking: Flanges manufactured according to EN 1092-1 should be marked with information such as the manufacturer's name or trademark, material designation, PN rating, and other relevant details.

7. Testing: The standard outlines testing procedures to ensure the quality and performance of the flanges, including methods for dimensional inspection, visual inspection, and testing for mechanical properties.

EN 1092-1 is widely used in European countries and provides a standardized approach to the design, manufacturing, and testing of flanges, promoting interchangeability and compatibility within piping systems. It is essential to refer to the specific edition of the standard for detailed and up-to-date information, as standards may be revised over time.

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