Pipe cap is a pipe fitting used to seal the end of pipes. Industrial caps may be round, square, rectangular, U- or I- shaped and may have a handgrip.
The fitting pipe between two lengths of pipe is ELBOW. It allows to change the directions with usually at 90°, 45° or 22.5°. Elbows are commonly used in water-supply facilities,food, chemical and electronic industrial pipeline and etc.
Tee is the most common pipe fitting used to combine / divide fluid flow. Tees can connect pipes of different diameters or change the direction of a pipe run.
A reducer is the component in a pipeline that reduces the pipe size from a larger to a smaller bore(inner diameter). There are two main types of reducer: Concentric and Eccentric reducers.