In piping, a nipple is a fitting, consisting of a short piece of pipe, usually provided with a male pipe thread at each end, for connecting two other female threaded fittings or pipes. Pipe Nipples are commonly used as adapters from one connection type to another. Pipe nipples are mainly used in low-pressure piping systems.

Pipe nipples are manufactured by cutting a specified length of pipe and applying the desired end connections. The pipe nipple dimensions and material follow from pipe specifications. Similar to pipe, pipe nipples also come in either a seamless or welded construction.

When ordering pipe nipples, the following properties must be specified:

Diameter
Length
Schedule
Material
End Connections

For piping systems which requires to be connected to welded pipes or fittings, “welding nipple” is used. Welding nipple has a threaded connection on one end and normal cut pipe at the other end. The unthreaded end of the pipe provides more surface area for the use of welding materials to make the stronger connection. One main benefit of welding nipple is that once the unthreaded end is connected, connecting pipes or other fittings to the threaded end becomes much more easy.For piping systems which requires to be connected to welded pipes or fittings, “welding nipple” is used. Welding nipple has a threaded connection on one end and normal cut pipe at the other end. The unthreaded end of the pipe provides more surface area for the use of welding materials to make the stronger connection. One main benefit of welding nipple is that once the unthreaded end is connected, connecting pipes or other fittings to the threaded end becomes much more easy.