Grooved flanges have grooves on the connecting end face. They are disc-shaped elements that are commonly used in pipeline engineering. They have mechanical constructions with flanges that can be joined by edge bolts.

A grooved pipe reducer is a pipe fitting that joins two pieces of pipe. It is classified as concentric or eccentric. They may be required to be employed when the flow in a piping system must be reduced or enlarged, such as when the hydraulic nature of the piping system requires it.

A grooved tee is used at the branch pipe of the main pipe in a pipe system to separate the flow of water into two directions. There are two types of grooved tees: equal diameter and diminishing diameter. It is utilized at the intersection of three pipes that are either the same or distinct, and it is further classified as a G type tee and a S type tee.