Flanges are metal parts used to connect pipes, valves, or pumps in a piping system. They are joined using bolts and help keep the system strong and leak-free. Flanges are used in many industries like oil & gas, water supply, chemical plants, and construction. There are different types of flanges, and each has its own use depending on the pressure and system requirements.
1. Flange
A standard flange is one of the most commonly used types of flanges. It connects two pipe ends using bolts and gaskets to create a strong, leakproof joint. These flanges are widely used in water pipelines, oil & gas plants, chemical industries, and building projects. Depending on the sealing need, they can come with a flat face (FF) or a raised face (RF). The size and thickness of the flange change according to the pipe size and material. To choose the right type, engineers often refer to a flange weight chart, which shows dimensions and weight in mm and kg for easy selection and planning.
Flange Weight Chart (in mm and kg)
| Pipe Size (NB) | Outside Diameter (mm) | Thickness (mm) | Weight (kg) |
| 50 mm | 165 | 17 | 3.0 |
| 100 mm | 220 | 23 | 6.4 |
| 150 mm | 285 | 25 | 10.8 |
2. Slip-On Flange
A Slip On Flange is one of the easiest flanges to install. It slides over the pipe and is welded from both the inside and outside, creating a secure connection. This type of flange is ideal for low-pressure systems and is known for being cost-effective and simple to align during fitting. Because of its easy installation, it is commonly used in fire protection lines, cooling water systems, and low-pressure industrial pipelines. To ensure correct sizing and fitting, professionals often refer to the Slip On Flange weight chart in mm, which helps them choose the right flange based on outer diameter, thickness, and weight.
Slip On Flange Weight Chart (in mm and kg)
| Pipe Size (NB) | Outside Diameter (mm) | Thickness (mm) | Weight (kg) |
| 50 mm | 165 | 19 | 3.3 |
| 100 mm | 220 | 24 | 7.0 |
| 150 mm | 285 | 26 | 11.9 |
3. Weld Neck Flange
A Weld Neck Flange is specially designed for high-pressure and high-temperature applications. It features a long tapered neck that smoothly connects to the pipe, allowing stress to pass through the flange and pipe evenly. This design helps reduce the risk of failure under pressure, making it ideal for extreme environments like power plants, refineries, and shipbuilding. To select the proper size and ensure a safe connection, engineers often refer to the Weld Neck Flange Weight Chart in kg, which provides detailed information on flange dimensions and their corresponding weights.
Weld Neck Flange Weight Chart (in mm and kg)
| Pipe Size (NB) | Outside Diameter (mm) | Neck Length (mm) | Weight (kg) |
| 50 mm | 165 | 60 | 4.1 |
| 100 mm | 220 | 114 | 9.3 |
| 150 mm | 285 | 168 | 16.8 |
4. Blind Flange
A Blind Flange is used to close the end of a pipe or a pressure vessel and does not have a center hole like other flanges. This makes it perfect for sealing off piping systems or conducting pressure tests. Blind flanges are commonly used when you need to temporarily block the flow or test the system for leaks and strength. They are also easy to remove and reinstall, making them ideal for maintenance tasks. For proper selection and planning, engineers and technicians often use a Blind Flange Weight Chart in PDF, which lists standard sizes, thickness, and weight for quick reference.
Blind Flange Weight Chart (in mm and kg)
| Pipe Size (NB) | Outside Diameter (mm) | Thickness (mm) | Weight (kg) |
| 50 mm | 165 | 20 | 4.7 |
| 100 mm | 220 | 26 | 8.8 |
| 150 mm | 285 | 30 | 15.2 |
Benefits of Using Weight Charts
Using weight charts while selecting flanges can help you:
- Choose the right product for your piping system
- Calculate transportation and installation costs
- Avoid overloading pipe supports
- Ensure safety in design
Weight charts show the outer diameter, thickness in mm, and total weight in kg. Having them in PDFformatmakes them easy to share, print, or store for future use.
Final Thoughts
Flanges are the backbone of many piping systems. From Slip On Flanges to Weld Neck Flanges and Blind Flanges, each type has a specific use and advantage. Knowing the dimensions in mm, checking the weight in kg, and using a reliable PDF weight chart makes your work smoother and more accurate.
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