Stainless steel flanges are common components in piping connections, serving the purposes of joining, supporting, and sealing various sections of piping systems. These flanges find applications in various industries, including petrochemicals, food processing, pharmaceuticals, water treatment, and more. When choosing stainless steel flanges for a specific application, it is crucial to understand the different types of flanges and their characteristics. This article will introduce the various types of stainless steel flanges and their key features.
1. Basic Types of Flanges:
- Weld Neck Flanges: These are one of the most common types of stainless steel flanges. They feature a long neck for additional strength and support and are typically used in high-temperature and high-pressure applications.
- Blind Flanges: These flanges have no openings and are typically used to cap the ends or close off sections of piping systems. They can also serve for inspection, cleaning, and maintenance purposes.
- Slip-On Flanges: These flanges have an external diameter slightly larger than the pipe to which they are being attached. They are easy to install and are suitable for low-pressure applications.
2. Threaded Flanges:
- Threaded Flanges: These flanges have internal threads, allowing them to be screwed onto a threaded pipe or fitting. They are commonly used in low-pressure applications and where welding is not feasible.
3. Socket Weld Flanges:
- Socket Weld Flanges: These flanges have a socket for welding to the pipe. They are ideal for small-diameter, high-pressure piping systems and are known for their good fatigue resistance.
4. Lap Joint Flanges:
- Lap Joint Flanges: These flanges are used in conjunction with a stub end or a lap joint ring. They provide easy alignment and can be rotated to align bolt holes, making them versatile for many applications.
5. Orifice Flanges:
- Orifice Flanges: These specialized flanges are used to facilitate the measurement and control of fluid flow through the pipeline. They feature orifice plates with a bore size that can be changed to control flow rates.
6. Spectacle Blind Flanges:
- Spectacle Blind Flanges: These unique flanges have a solid center section and a pair of metal “blinds” that can be rotated to block or allow flow. They are often used in pipelines requiring maintenance or repair without shutting down the entire system.
Each type of stainless steel flange offers distinct advantages and is suitable for specific applications. Understanding these variations is essential in selecting the right flange for your piping system, ensuring its efficiency, safety, and longevity.