ANSI / ASME B16.5 Class 150 Lap Joint Flange Dimensions
Lap Joint flanges are commonly used in low-pressure, non-corrosive medium systems, such as in industries like food processing, pharmaceuticals, and water treatment.
ANSI / ASME B16.5 Class 150 Lap Joint Flange
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Length Thru Hub (Y) | Hub Diameter (X) | Radius (r) | Bore (B) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 3.50 | 0.44 | 0.63 | 1.19 | 0.13 | 0.90 | 1 | 2.38 | 4 | 0.63 |
| 3/4 | 3.88 | 0.50 | 0.63 | 1.50 | 0.13 | 1.11 | 2 | 2.75 | 4 | 0.63 |
| 1 | 4.25 | 0.56 | 0.69 | 1.94 | 0.13 | 1.38 | 2 | 3.13 | 4 | 0.63 |
| 1 1/4 | 4.63 | 0.63 | 0.81 | 2.31 | 0.19 | 1.72 | 3 | 3.50 | 4 | 0.63 |
| 1 1/2 | 5.00 | 0.69 | 0.88 | 2.56 | 0.25 | 1.97 | 3 | 3.88 | 4 | 0.63 |
| 2 | 6.00 | 0.75 | 1.00 | 3.06 | 0.31 | 2.46 | 5 | 4.75 | 4 | 0.75 |
| 2 1/2 | 7.00 | 0.88 | 1.13 | 3.56 | 0.31 | 2.97 | 7 | 5.50 | 4 | 0.75 |
| 3 | 7.50 | 0.94 | 1.19 | 4.25 | 0.38 | 3.60 | 8 | 6.00 | 4 | 0.75 |
| 3 1/2 | 8.50 | 0.94 | 1.25 | 4.81 | 0.38 | 4.10 | 11 | 7.00 | 8 | 0.75 |
| 4 | 9.00 | 0.94 | 1.31 | 5.31 | 0.44 | 4.60 | 13 | 7.50 | 8 | 0.75 |
| 5 | 10.00 | 0.94 | 1.44 | 6.44 | 0.44 | 5.69 | 15 | 8.50 | 8 | 0.88 |
| 6 | 11.00 | 1.00 | 1.56 | 7.56 | 0.50 | 6.75 | 19 | 9.50 | 8 | 0.88 |
| 8 | 13.50 | 1.13 | 1.75 | 9.69 | 0.50 | 8.75 | 30 | 11.75 | 8 | 0.88 |
| 10 | 16.00 | 1.19 | 1.94 | 12.00 | 0.50 | 10.92 | 43 | 14.25 | 12 | 1.00 |
| 12 | 19.00 | 1.25 | 2.19 | 14.38 | 0.50 | 12.92 | 64 | 17.00 | 12 | 1.00 |
| 14 | 21.00 | 1.38 | 3.13 | 15.75 | 0.50 | 14.18 | 105 | 18.75 | 12 | 1.13 |
| 16 | 23.50 | 1.44 | 3.44 | 18.00 | 0.50 | 16.19 | 140 | 21.25 | 16 | 1.13 |
| 18 | 25.00 | 1.56 | 2.88 | 19.88 | 0.50 | 18.20 | 160 | 22.75 | 16 | 1.25 |
| 20 | 27.50 | 1.69 | 4.06 | 22.00 | 0.50 | 20.25 | 195 | 25.00 | 20 | 1.25 |
| 22 | 29.50 | 1.81 | 4.25 | 24.25 | 0.50 | 22.25 | 245 | 27.25 | 20 | 1.38 |
| 24 | 32.00 | 1.88 | 4.38 | 26.13 | 0.50 | 24.25 | 275 | 29.50 | 20 | 1.38 |
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Length Thru Hub (Y) | Hub Diameter (X) | Radius (r) | Bore (B) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 88.90 | 11.18 | 16.00 | 30.23 | 3.30 | 22.86 | 0.45 | 60.45 | 4 | 16.00 |
| 3/4 | 3.88 | 0.50 | 0.63 | 1.50 | 0.13 | 1.11 | 0.91 | 2.75 | 4 | 0.63 |
| 1 | 4.25 | 0.56 | 0.69 | 1.94 | 0.13 | 1.38 | 0.91 | 3.13 | 4 | 0.63 |
| 1 1/4 | 4.63 | 0.63 | 0.81 | 2.31 | 0.19 | 1.72 | 1.36 | 3.50 | 4 | 0.63 |
| 1 1/2 | 5.00 | 0.69 | 0.88 | 2.56 | 0.25 | 1.97 | 1.36 | 3.88 | 4 | 0.63 |
| 2 | 6.00 | 0.75 | 1.00 | 3.06 | 0.31 | 2.46 | 2.27 | 4.75 | 4 | 0.75 |
| 2 1/2 | 7.00 | 0.88 | 1.13 | 3.56 | 0.31 | 2.97 | 3.18 | 5.50 | 4 | 0.75 |
| 3 | 7.50 | 0.94 | 1.19 | 4.25 | 0.38 | 3.60 | 3.63 | 6.00 | 4 | 0.75 |
| 3 1/2 | 8.50 | 0.94 | 1.25 | 4.81 | 0.38 | 4.10 | 4.99 | 7.00 | 8 | 0.75 |
| 4 | 9.00 | 0.94 | 1.31 | 5.31 | 0.44 | 4.60 | 5.90 | 7.50 | 8 | 0.75 |
| 5 | 10.00 | 0.94 | 1.44 | 6.44 | 0.44 | 5.69 | 6.80 | 8.50 | 8 | 0.88 |
| 6 | 11.00 | 1.00 | 1.56 | 7.56 | 0.50 | 6.75 | 8.62 | 9.50 | 8 | 0.88 |
| 8 | 13.50 | 1.13 | 1.75 | 9.69 | 0.50 | 8.75 | 13.61 | 11.75 | 8 | 0.88 |
| 10 | 16.00 | 1.19 | 1.94 | 12.00 | 0.50 | 10.92 | 19.50 | 14.25 | 12 | 1.00 |
| 12 | 19.00 | 1.25 | 2.19 | 14.38 | 0.50 | 12.92 | 29.03 | 17.00 | 12 | 1.00 |
| 14 | 21.00 | 1.38 | 3.13 | 15.75 | 0.50 | 14.18 | 47.63 | 18.75 | 12 | 1.13 |
| 16 | 23.50 | 1.44 | 3.44 | 18.00 | 0.50 | 16.19 | 63.50 | 21.25 | 16 | 1.13 |
| 18 | 25.00 | 1.56 | 2.88 | 19.88 | 0.50 | 18.20 | 72.57 | 22.75 | 16 | 1.25 |
| 20 | 27.50 | 1.69 | 4.06 | 22.00 | 0.50 | 20.25 | 88.45 | 25.00 | 20 | 1.25 |
| 22 | 29.50 | 1.81 | 4.25 | 24.25 | 0.50 | 22.25 | 111.13 | 27.25 | 20 | 1.38 |
| 24 | 32.00 | 1.88 | 4.38 | 26.13 | 0.50 | 24.25 | 124.74 | 29.50 | 20 | 1.38 |
Features of Class 150 Lap Joint Flange
- Design: The flange connects to the pipe via the stub end, allowing it to rotate freely around the pipe for easy installation and bolt hole alignment.
- Pressure Rating: Class 150 indicates that it is suitable for systems with a maximum working pressure of 150 psi.
- Applications: Suitable for low-pressure, non-critical systems, such as pipelines carrying liquids or gases. It is commonly used in applications that require frequent disassembly or maintenance.
- Materials: Typically made from carbon steel, stainless steel, and other materials.
- Standard: Conforms to the ANSI / ASME B16.5 standard, ensuring consistency in dimensions, materials, and pressure ratings.
ANSI / ASME B16.5 Class 150 Lap Joint Flange is a flange that is used in conjunction with a stub end fitting. The Lap Joint flange itself does not directly connect to the pipe but instead slips over the pipe and is connected to the stub end. There is no welding between the flange and the pipe, only a connection between the flange and the stub end. This design allows the flange to rotate freely, making it easier to align bolt holes. It is ideal for low-pressure, non-critical systems that require frequent disassembly.
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FAQ
A Lap Joint Flange is a type of flange that is used with a stub end fitting. It is designed to slide over the pipe and rotate freely for easier alignment of bolt holes during installation. The flange itself is not welded to the pipe; instead, it is clamped against the stub end.
They are installed with a stub end fitting. The pipe is welded to the stub end, and the flange is slipped over the pipe. The flange is then bolted to another flange or fitting.
No, Lap Joint Flanges are typically used for low-pressure systems. For high-pressure applications, other flange types, such as Weld Neck Flanges, are recommended.
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