Flanges are an essential component in piping systems, serving as a connection point for pipes, valves, pumps, and other equipment. One of the key factors in selecting the right type of flange for a given application is understanding the different types available and their respective uses.

Weld Neck Flanges: These flanges have a long tapered hub and are typically used in high-pressure and high-temperature applications. They are designed to be welded to a pipe, making them suitable for use in situations where a tight seal is required.

Slip-On Flanges: These flanges have a shorter hub and are designed to slip over the end of a pipe. They are typically used in low-pressure applications and are relatively easy to install.

Blind Flanges: These flanges have no bore and are used to close off the end of a pipe or valve. They are typically used in situations where access to the inside of the pipe is not required.

Threaded Flanges: These flanges have threads on the inside, allowing them to be screwed onto a pipe. They are typically used in low-pressure applications and are relatively easy to install.

Lap Joint Flanges: These flanges have a radius at the intersection of the face and the bore, which allows for easy alignment with a lap joint stub end. They are typically used in low-pressure applications and are relatively easy to install.

Socket Weld Flanges: These flanges have a small bore and are designed to be welded to a pipe. They are typically used in high-pressure and high-temperature applications and are suitable for use in situations where a tight seal is required.

Orifice Flanges: These flanges have a machined ring that is used to measure the flow rate in a pipe. They are typically used in metering and regulating systems.

Spectacle Flanges: These flanges are a combination of two flanges with a small piece of metal in between. They are used to isolate a section of the pipe for maintenance or inspection.

In conclusion, there are a variety of flange types available, each with their own specific uses. To ensure the safe and efficient operation of a piping system, it is important to select the appropriate type of flange based on the specific requirements of the application. Factors to consider include the pressure and temperature of the system, the type of seal required, and the ease of installation and maintenance.