Table E Flange Dimensions Chart: Complete Size Reference Guide
Meaurements of all common flange tables including PCD, number of holes and flange diameter. AS4087, AS2129, ANSI B16.5 & ISO 7005 (DIN)...
Understanding Table E Flange Dimensions: A Comprehensive Guide
Table E flanges, also known as raised face flanges, are a type of pipe flange used in various industries, including oil and gas, chemical processing, and power generation. Understanding the dimensions of Table E flanges is crucial for selecting the right fitting for your piping system. This guide provides a detailed overview of Table E flange dimensions, their importance, and how to read a dimension chart.
Why Table E Flange Dimensions Matter
Accurate dimensioning of Table E flanges ensures a proper fit and alignment in your piping system. Incorrect dimensions can lead to leaks, reduced system efficiency, and potential safety hazards. Therefore, it's essential to choose the right flange based on the pipe size, pressure rating, and material.
Key Dimensions of Table E Flanges
- Nominal Pipe Size (NPS): The diameter of the pipe that the flange will connect to.
- Flange Outer Diameter (OD): The outer diameter of the flange.
- Flange Thickness (T): The thickness of the flange, measured from the raised face to the back of the flange.
- Hub Diameter (HD): The diameter of the hub, which is the part of the flange that fits inside the pipe.
- Hub Thickness (HT): The thickness of the hub, measured from the back of the flange to the end of the hub.
- Bolt Circle Diameter (BCD): The diameter of the imaginary circle on which the bolt holes are located.
- Bolt Hole Pattern: The arrangement of bolt holes, typically in a circle or square pattern.
Reading a Table E Flange Dimensions Chart
Table E flange dimensions charts provide a quick reference for selecting the correct flange. Here's how to read one:
| NPS | OD (mm) | T (mm) | HD (mm) | HT (mm) | BCD (mm) | Bolt Hole Pattern |
|---|---|---|---|---|---|---|
| 50 | 574 | 51 | 457 | 41 | 508 | 20 bolts, 120° |
| 80 | 864 | 76 | 762 | 66 | 813 | 24 bolts, 90° |
In the chart above, you can find the dimensions for Table E flanges with NPS 50 and NPS 80. For example, an NPS 50 Table E flange has an OD of 574 mm, a T of 51 mm, and a BCD of 508 mm, with a 20-bolt, 120° pattern.
Factors Affecting Table E Flange Dimensions
Several factors can affect the dimensions of Table E flanges, including:
- Pipe Size: The nominal pipe size determines the overall dimensions of the flange.
- Pressure Rating: Higher pressure ratings may require thicker flanges and more bolts.
- Material: The material of the flange can affect its thickness and strength.
- Standard: Different standards, such as ASME B16.5 or EN 1092-1, may have slightly different dimensions for the same pipe size.
Always consult the relevant standard or manufacturer's data sheet for the most accurate dimensions when selecting a Table E flange.
Conclusion
Understanding Table E flange dimensions is crucial for ensuring a proper fit and alignment in your piping system. By familiarizing yourself with the key dimensions and how to read a dimensions chart, you can make informed decisions when selecting Table E flanges. Always consult the relevant standards and manufacturer's data sheets for the most accurate and up-to-date information.
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