All dimensions are in mm. BS 10:1962 Table E Plate Flange. Size. A. B. C. D. E. No Of Bolts. ½”. 95.00. 22.30. 6.40. 66.70. 12.70. 4.00. ¾”. 102.00. 27.70...
When it comes to standardizing your piping systems, understanding the dimensions of table e flanges is crucial. These flanges are an essential component in connecting pipes, valves, and other fittings, ensuring a secure and reliable seal. This article provides a comprehensive guide to standard table e flange dimensions, focusing on the most common sizes and materials.
Table E flanges, also known as raised face flanges, are a type of welding neck flange characterized by a raised face that extends above the bolt circle. They are widely used in high-pressure and high-temperature applications due to their robust design and superior sealing capabilities. The dimensions of table e flanges are standardized by various organizations, with the most common being the American Petroleum Institute (API) and the American Society of Mechanical Engineers (ASME).
The dimensions of table e flanges are typically specified in terms of nominal pipe size (NPS), schedule, and material. The NPS refers to the inside diameter of the pipe or fitting, while the schedule indicates the wall thickness. The material determines the strength and corrosion resistance of the flange.

Here's a table outlining the standard dimensions of table e flanges according to API 607 and ASME B16.5:
| NPS | Schedule | Bolt Circle Diameter (mm) | Bolt Hole Diameter (mm) | Bolt Pitch Diameter (mm) | Face to Bolt Hole (mm) | Material |
|---|---|---|---|---|---|---|
| 1/2 | 40 | 64 | 16 | 48 | 20 | Carbon Steel |
Note that these dimensions are for informational purposes only and should not be used for design or manufacturing purposes. Always refer to the latest API or ASME standards for accurate and up-to-date dimensions.
Several factors can influence the dimensions of table e flanges, including:

Selecting the appropriate table e flange involves considering several factors, including the pipe size, pressure rating, temperature, and the corrosive nature of the fluid being transported. Always consult the relevant design standards and manufacturers' recommendations to ensure the chosen flange meets the application's requirements.
When specifying table e flanges, it's essential to provide the following information:
Understanding standard table e flange dimensions is vital for designing and maintaining reliable piping systems. By familiarizing yourself with the dimensions outlined in this article and considering the factors affecting flange selection, you can make informed decisions that ensure the integrity and longevity of your piping infrastructure. Always refer to the latest design standards and manufacturers' recommendations for the most accurate and up-to-date information.
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