Pipe may refer to:

• Pipe (material), a hollow cylinder following certain dimension rules
• Pipe for transporting water (Water pipe), chemical, gas and casing pipe for cables
• Pipe (smoking)
• Pipe (character) or vertical bar, the ASCII character '|'
• Pipe (Unix), a set of processes chained by their standard streams
• Pipe (unit) or butt, a cask measurement
• Jules Pipe CBE, Mayor of the London Borough of Hackney, UK
• Pipes (surname)
• Pipes (Transformers), a fictional character
• Pipe, Wisconsin
• PIPE Networks
• PIPES, a common buffer used in chemistry and biology laboratory work
• PIPE deal or private investment in public equity
• PIPE, Physical Interface for PCI Express

In music:

• Pipe (instrument), a traditional perforated wind instrument
• Bagpipe, a class of musical instrument, aerophones using enclosed reeds
• Uilleann pipes, a unique form of bagpipes originating in Ireland
• Pipes and drums or pipe bands, composed of musicians who play the Scottish and Irish bagpipes
• Pan pipes, an ancient musical instrument based on the principle of the stopped pipe
• Organ pipe, one of the tuned resonators that produces the main sound of a pipe organ
• Boatswain's pipe, also known as a bosun's whistle

Pipe may also be used for:

• Volcanic pipe, a deep, narrow cone of solidified magma
• Postpipe, archaeological remains of a timber in a posthole
• Half-pipe and quarter pipe, semi-circular ramps for performing skateboarding/snowboarding tricks
• Pipeline (computing), a set of data processing elements connected in series
• Pipeline (software), a chain of processes or other data processing entities
• Yahoo Pipes, a web service and programming interface to aggregate data feeds
• Piping bags are used to pipe semi-solid foods onto other foods (e.g. icing on a cake)

See also

• Piper (disambiguation)
• Piping, the use of pipes in industry
• Pipette, used in chemistry and biology laboratory work