threaded flange 1

Threaded Flanges Dimensions & Weights (EN 1092-1)

threaded flange 1

Threaded Flanges Dimensions & Weights (EN 1092-1)

Dimensions and weights (in kgs.) of EN 1092-1 Type 13 threaded flanges for European piping systems



A “Type 13” flange according to EN 1092-1 refers to a hubbed threaded flange. This specification comes under the broader EN 1092-1 standard, which outlines dimensions, tolerances, and material requirements for a wide array of flanges used in various piping systems across different industries. While “Type 11” is the designation for standard weld neck flanges within the EN 1092-1 standard, “Type 13” specifies a variant that combines the characteristics of a weld neck flange with the convenience of a threaded connection.

Key Characteristics of Type 13 EN 1092-1 THD Flanges

  • Threaded Connection: Unlike the standard weld neck flange (Type 11) that requires welding to connect to a pipe, Type 13 flanges feature internal threads. This allows them to be screwed directly onto a corresponding externally threaded pipe, facilitating easier installation and removal without the need for welding.

  • Hubbed Design: The flange includes a hub, which increases its strength and rigidity. This design feature also helps to distribute stress more evenly across the flange and the connected pipe, enhancing the overall integrity of the connection.

  • Applications: Type 13 flanges are suitable for applications where welding is not feasible or where quick assembly and disassembly are required for maintenance or system modification. They are commonly used in low to moderate-pressure and temperature environments.

  • Material Specifications: As with other flanges specified in EN 1092-1, Type 13 flanges can be made from various materials, including carbon steel, stainless steel, and alloy materials, to suit different operational requirements and media compatibility.

  • Pressure and Size Ratings: The EN 1092-1 standard provides dimensions and pressure ratings for Type 13 flanges, ensuring they can be appropriately selected to match the needs of specific applications and comply with the required safety and performance standards.


  • Ease of Installation and Removal: The threaded connection allows for easier installation and removal compared to welded connections, reducing labor and downtime.

  • No Welding Required: Eliminates the need for welding equipment and expertise, making it a convenient option for various settings, including those where welding may pose safety risks.

  • Versatile Applications: Can be used in various settings where the fluid handled and system conditions are compatible with a threaded connection.


  • Sealing Integrity: While providing a solid connection, the sealing integrity of threaded flanges under extreme conditions may not match that of welded connections, limiting their use in high-pressure or high-temperature applications.

  • Thread Compatibility: It’s crucial to ensure compatibility between the flange threads and pipe threads to avoid cross-threading or misalignment.

In summary, a “Type 13” EN 1092-1 “hubbed” threaded flange offers a unique combination of ease of installation and the mechanical strength provided by its “hubbed” design, making it suitable for specific applications where welding is not desired or practical.


“Type 13” according to EN 1092-1 designates a hubbed threaded flange. This specification is part of the EN 1092-1 standard, which details requirements for steel flanges used in various piping systems, including dimensions, materials, and pressure ratings. Type 13 flanges incorporate both the structural support feature of a hub and the convenience of a threaded connection.



PN 6 threaded flange dimensions (EN 1092-1 type 13) with stud metric bolts and nuts requirements (sizes in millimeters)

size of threaded flange en 1092

Flange DN FlangeNeckRaised faceScrewsFlange Weight
d1ThreadkDbh1d3d4fd2ThreadBolt HolesKG
1521,3R 1/2″5580122030,040,02,011M1040,373
2026,9R 3/4″6590142440,050,02,011M1040,584
2533,7R 1″75100142450,060,02,011M1040,729
3242,4R 1-1/4″90120142660,070,02,014M1241,040
4048,3R 1-1/2″100130142670,080,03,014M1241,200
5060,3R 2″110140142880,090,03,014M1241,340
6576,1R 2-1/2″1301601432100,0110,03,014M1241,830
8088,9R 3″1501901634110,0128,03,018M1642,750
100114,3R 4″1702101640130,0148,03,018M1643,010
125139,7R 5″2002401844160,0178,03,018M1684,300
150168,3R 6″2252651844185,0202,03,018M1684,630


PN 16 threaded flange dimensions (EN 1092-1 type 13) with stud metric bolts and nuts requirements
Sizes in millimeters

size of threaded flange en 1092

Flange DN FlangeNeckRaised faceScrewsFlange Weight
d1ThreadkDbh1d3d4fd2ThreadBolt HolesKG
1521,3R 1/2″6595162235,045,02,014M1240,722
2026,9R 3/4″75105182645,058,02,014M1241,040
2533,7R 1″85115182852,068,02,014M1241,250
3242,4R 1-1/4″100140183060,078,02,018M1641,810
4048,3R 1-1/2″110150183270,088,03,018M1642,060
5060,3R 2″125165182884,0102,03,018M1642,390
6576,1R 2-1/2″1451851832104,0122,03,018M1642,970
8088,9R 3″1602002034118,0138,03,018M1683,780
100114,3R 4″1802202040140,0158,03,018M1684,380
125139,7R 5″2102502244168,0188,03,018M1686,070
150168,3R 6″2402852244195,0212,03,022M2087,240


EN 1092-1 flanges, specifically those requiring threading like the Type 13 hubbed threaded flanges, typically follow the ISO 7-1 standard for threading.

This standard specifies the requirements for ISO metric screw threads with the designation “Rp” for internal threads. ISO 7-1 is widely used for pipe threads where pressure-tight joints are made on the threads themselves. The threading is designed to ensure compatibility and a secure fit between interconnected piping components.

ISO 7-1 Threading Specifications

  • Type: Taper external threads and parallel internal threads. The standard specifies dimensions, tolerances, and designation for both types of threads.
  • Sealing Mechanism: The threads themselves can form a pressure-tight joint, not necessarily requiring additional sealing methods (e.g., gaskets) when properly engaged. However, in practice, some form of thread sealant (like PTFE tape or thread sealing compound) is often used to ensure a leak-proof connection.
  • Compatibility: Designed for general use in joining and sealing pipes and fittings. The standardized dimensions facilitate the interchangeability of components across different manufacturers and systems.

For EN 1092-1 Type 13 flanges, the threading allows for direct screwing onto corresponding externally threaded pipe ends, making installation and removal straightforward without the need for welding. This type of connection is particularly advantageous for applications where frequent disassembly might be required or where welding is not feasible.

When specifying or working with EN 1092-1 Type 13 flanges (or any threaded piping components conforming to European standards), it’s essential to ensure that the threading conforms to ISO 7-1 to guarantee compatibility and a secure, pressure-tight connection.

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Projectmaterials Team is an online resource dedicated to providing in-depth information, analysis, and educational content related to the fields of project materials management, engineering, and procurement, particularly within the oil & gas, construction, shipbuilding, energy, and renewable energy sectors. It aims to serve professionals and enthusiasts in these industries by offering valuable insights into materials, equipment, and techniques used in various projects, focusing on the selection, application, and maintenance of these resources. Key features of the blog include: * Educational Articles: Comprehensive posts that cover topics ranging from the technical aspects of piping products (pipes, valves, fittings, flanges, gaskets, bolts, instrumentation) to structural steel and process equipment (including oil extraction systems, drilling rigs, wellheads, pumps, compressors, and separation systems). * Industry Insights: Updates on the latest trends, technologies, and regulatory changes affecting the industries covered. * Guides and How-Tos: Practical advice on selecting the right materials and equipment for specific applications, as well as tips on installation, maintenance, and troubleshooting. * Safety and Standards: Information on safety equipment for production sites, risk mitigation procedures, and an overview of relevant industry standards and regulatory frameworks. The website is designed to support the professional development of engineers, procurement specialists, project managers, and other stakeholders involved in project plant businesses, by disseminating critical know-how and best practices. Whether readers are new to the field or seasoned professionals, offers resources to enhance their understanding and performance in managing project materials effectively.

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