There are many pipe connector types, and their functions are different. Some connect pipes, some change the direction of pipes, some change the diameter of pipes, or divert flow.
Pipe Connector Types
If you’re considering using a pipe connector, choose one based on the application, pressure, media, and other external factors.
The most common types of connections are threaded, flanged, butt-welded, clamped, and socket-welded.
Functional shapes include straight, elbow, tee, reducer, and cap.
References
Plumbing Connector Types and Applications.
Types of Plumbing Pipe Fittings and Connections.
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