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...
Table E flanges, a crucial component in piping systems, are used to connect pipes to equipment, valves, and other piping components. Understanding the dimensions of Table E flanges is vital for ensuring the correct fit and optimal performance of your piping system. This guide will provide you with a detailed overview of Table E flange dimensions, focusing on Indian standards and their relevance to the Indian industry.
Table E flanges, as defined by the American Petroleum Institute (API), are raised face flanges with a ring-type joint. They are used in high-pressure and high-temperature applications, making them a popular choice in various industries, including oil and gas, chemical processing, and power generation, in India and worldwide.
In India, the Bureau of Indian Standards (BIS) has established standards for flanges, including Table E flanges. The most relevant standards are IS 282:1970 and IS 15607:2000. These standards provide dimensions for Table E flanges based on the nominal pipe size (NPS) and the pressure rating. Here's a summary of the dimensions:

| NPS (mm) | Pressure Rating (bar) | Outside Diameter (OD) | Inside Diameter (ID) | Bolt Circle Diameter (BCD) | Bolt Hole Diameter (BHD) | Bolt Pitch (mm) |
|---|---|---|---|---|---|---|
| 50 | 150 | 139.7 | 47.3 | 114.3 | 19.05 | 31.75 |
| 80 | 300 | 215.9 | 77.3 | 187.4 | 22.23 | 44.45 |
The dimensions of Table E flanges are influenced by several factors, including:
Accurately understanding and applying Table E flange dimensions is crucial for several reasons:
Understanding Table E flange dimensions is essential for Indian industries to ensure the optimal performance and safety of their piping systems. By adhering to Indian standards such as IS 282:1970 and IS 15607:2000, industries can maintain the integrity of their piping systems, comply with regulations, and minimize maintenance costs. Always consult the relevant standards and guidelines when selecting and installing Table E flanges to ensure the best results.

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