There are several types of pipe fittings, such as elbow, tee, cross, reducer, coupling, union, nipple, cap, plug, adapter, and connector. There is a function for each fitting in a piping system. Elbows alter the direction of pipes, tees branch off, reducers join various pipe sizes, and caps and plugs close the ends of pipes.

Pipe fittings serve the main functions of directing fluids, regulating flow, limiting pressure, and regulating the quantity of fluid in a piping system. They also enable pipelines to branch off, grow thicker or thinner, or end or merge with other pipelines. Fittings may be welded, threaded, mechanically connected, or socket welded depending on the application.

Pipe fittings are utilized in industrial, commercial, construction, plumbing as well as process piping systems. Some of the more common applications include oil and gas, petrochemical, chemical processing, water treatment, power generation, shipbuilding, food processing, and wastewater systems. They join pipes together and ensure the controlled and reliable transport of liquids, gases or other process fluids.

Pipes are used for the movement of liquid or gas; fittings are used to join and alter the piping. Fittings like elbows, tees, reducers, couplings and caps redirect fluid flow or branch off lines, while also sealing sections of pipelines and restrict the flow of fluid in the pipeline.Fittings like elbows, tees, reducers, couplings, and caps move fluid from one way to another, branch off into lines, change size, and close sections of pipelines, and restrict fluid flow in pipelines. Both are important parts of the entire piping system.

The function of pipe fittings is to make a piping system useful, versatile, and properly connected. They allow pipelines to turn, split into several pipelines, switch to a different diameter, and end sections as needed. The correct fitting choice also guarantees fluid flow and leak-free connections in industrial or commercial piping systems.