The blind flange is utilized to seal the end of pipes, pressure vessel openings, or valves. It is a solid plate with no center hole.

The lap joint flanges with the stub end assembly are typically utilized in systems that need frequent disassembly for inspection and cleaning.

Slip-on flange is typically attached to a pipe using one or two fillet welds (one on the outside of the flange and one on the inside), although it is also possible to use just a single weld.

Threaded flanges have a similar outline to slip-on flanges, but the bore is threaded, allowing for assembly without welding. This restricts its use to relatively low-pressure piping systems.

Weld Neck Flanges are designed to be connected to a piping system by butt welding. They are relatively costly due to their long neck but are preferred for high-stress applications.

Orifice flanges are utilized with an orifice plate or flow nozzle to measure the flow rate of liquids or gases in the pipeline.