BS 10 Table H Flange Dimensions: Complete Size Chart & Calculation Guide
Nominal O.D of Dia. of. Dia. of. No. of Dia. of Thickness. Pipe size Pipe. Flange Bolt Circle Bolt. Bolt. 1/2". 21.3. 95.3. 66.7. 4. 12.7. 4.8. 3/4". 26.7....
BS 10 table h flanges, also known as flat face flanges, are a type of pipe fitting used to connect pipes or to attach fittings to the end of a pipe. They are designed to provide a flat sealing surface for gaskets, making them suitable for a wide range of applications in piping systems. This article will provide a comprehensive overview of BS 10 table h flanges, their dimensions, and their uses.
Understanding BS 10 Table H Flanges
BS 10, also known as BS 10:1986, is a British Standard that specifies the dimensions and tolerances for flanges used in piping systems. Table H in this standard covers flat face flanges, which are typically used for low-pressure applications. These flanges have a flat sealing surface, making them suitable for use with gaskets.
BS 10 Table H Flange Dimensions
The dimensions of BS 10 table h flanges are specified in the standard and are based on the nominal bore size of the pipe. The main dimensions include:
| Nominal Bore Size (mm) | Flanges Thickness (mm) | Bolt Circle Diameter (mm) | Number of Bolts |
|---|---|---|---|
| 25 | 5 | 70 | 4 |
| 32 | 6 | 80 | 4 |
| 40 | 8 | 100 | 4 |
| 50 | 10 | 120 | 4 |
| 65 | 12 | 140 | 4 |
| 80 | 16 | 160 | 4 |
| 100 | 20 | 180 | 4 |
These dimensions are for standard pressure ratings. Higher pressure ratings may require thicker flanges and more bolts.
Uses of BS 10 Table H Flanges
BS 10 table h flanges are used in a variety of applications where a flat sealing surface is required. They are commonly used in low-pressure piping systems for fluids such as water, air, and other non-corrosive liquids. Some of the specific uses include:
- Connecting pipes to pumps, valves, and other fittings
- Attaching pipes to equipment such as heat exchangers, filters, and storage tanks
- Creating temporary or permanent pipe connections for maintenance or repair work
- Connecting pipes to instrumentation and control devices
Choosing the Right BS 10 Table H Flange
When selecting a BS 10 table h flange, it's important to consider several factors to ensure the correct fit and performance:
- Pipe Size: The flange must match the nominal bore size of the pipe
- Pressure Rating: The flange must be rated for the maximum pressure in the system
- Material: The flange material should be compatible with the fluid being piped and the system's temperature
- Bolts: The bolts must be of the correct size and material, and must be torqued correctly to ensure a proper seal
Installing BS 10 Table H Flanges
Installing BS 10 table h flanges requires careful attention to detail to ensure a proper seal and prevent leaks. The following steps outline the installation process:
- Ensure the pipe ends are clean and free of burrs or sharp edges
- Position the flange on the pipe, aligning the bolt holes with the pipe's axis
- Install the bolts and nuts, ensuring they are properly aligned and torqued
- Install the gasket, ensuring it is properly positioned and not twisted
- Tighten the bolts in a criss-cross pattern, using the recommended torque value
- Check the seal for leaks
Regular inspection and maintenance of BS 10 table h flanges are essential to ensure their continued performance and prevent leaks or failures.
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