BS 10 Table D Flange Dimensions: Exact Size Chart & Standard Specifications
Check BS10 Table E Flange Specification As Per British. Standard. Page 3. 3. BS10 Flange Specifications. British Standard. Manufacturing ......
BS 10 Table D Flange Dimensions: A Comprehensive Guide
BS 10, also known as the British Standard for flanges, is a widely recognized standard in the engineering and manufacturing industries. It provides dimensions for flanges used in piping systems and pressure vessels. This guide focuses on Table D of BS 10, which outlines the dimensions for long weld-neck flanges.
Understanding BS 10 and Table D
BS 10, first published in 1943, has since been revised and updated to keep pace with advancements in materials and manufacturing techniques. Table D, introduced in the 1990s, caters to the increasing demand for long weld-neck flanges, which are used in high-pressure and high-temperature applications.
Table D provides dimensions for flanges with weld necks that are at least 1.5 times the nominal bore size. These flanges are designed to withstand high stresses and are often used in critical applications, such as in the petrochemical, nuclear, and power generation industries.
Key Dimensions in BS 10 Table D
Table D lists dimensions for flanges with nominal bore sizes ranging from 1/2" to 54" (15mm to 1350mm). The key dimensions provided in the table include:
- Nominal Bore Size (NB): The inside diameter of the flange.
- Neck Length (NL): The length of the weld neck, which is at least 1.5 times the nominal bore size.
- Flange Outer Diameter (OD): The outside diameter of the flange.
- Hub Length (HL): The length of the hub, which is the part of the flange that fits into the pipe.
- Hub Thickness (HT): The thickness of the hub.
- Flange Thickness (FT): The thickness of the flange, excluding the hub.
Table D Dimensions: An Example
Let's consider the dimensions for a 12" (300mm) long weld-neck flange from Table D:
| Dimension | Value (mm) |
|---|---|
| Nominal Bore Size (NB) | 300 |
| Neck Length (NL) | 450 |
| Flange Outer Diameter (OD) | 508 |
| Hub Length (HL) | 76 |
| Hub Thickness (HT) | 38 |
| Flange Thickness (FT) | 51 |
Tolerances and Material Standards
BS 10 also specifies tolerances for the dimensions listed in Table D. These tolerances ensure that flanges from different manufacturers are interchangeable. Additionally, BS 10 recommends material standards, such as BS 3600 for carbon steel and BS 3017 for stainless steel, to ensure the quality and consistency of the flange material.
Why Choose BS 10 Table D Flanges?
Flanges complying with BS 10 Table D offer several advantages, including:
- High strength and durability, thanks to the long weld neck.
- Wide availability, as many manufacturers produce flanges to BS 10 standards.
- Interchangeability, due to the specified tolerances.
- Compliance with international standards, as BS 10 is widely recognized and accepted.
Whether you're designing a new piping system or maintaining an existing one, BS 10 Table D flanges offer a reliable and robust solution for high-pressure and high-temperature applications.
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