Piston displacement Pitot tube

the flues and stops on a pipe organ

A term that should not be used when referring to the pipes that convey compressed air. 'Pipework' has a special meaning in the context of the Pressure Systems Regulations i.e. A pipe or system of pipes with associated valves, pumps, compressors and other pressure containing components includes hoses but does not include the air receiver or any protective devices. Avoid the use of 'pipeline' also also as this also has a specific meaning in the Pressure Systems Safety Regulations.

The pipework layout is the domain of the system designer, as there are many styles and designs that may be used e.g. in room of equal size, a room that had no windows would require a different layout to a room that had a large window area, also the amount of heat emitted by the piping in Watts/metre would also affect the design.