Within industry, piping is a system of pipes used to convey fluids from one location to another. The engineering discipline of piping design studies the efficient transport of fluid.
Large-scale piping system in an HVAC mechanical room
Ukraine, Olbia, elements of water pipes, the beginning of our era. Mykolayiv Regional Museum of Local History
Stacking of a connected pipeline for transportation of oil products
A pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids. It can also be used for structural applications; hollow pipe is far stiffer per unit weight than solid members.
Drain pipe of the Louvre
Pipe installation on a street in Belo Horizonte, Brazil
Historic water mains from Philadelphia included wooden pipes
Carbon Steel Pipe in a storage yard