Connecting piece between two lengths of pipe or lengths of pipe and fittings. Joints are threaded, welded, cemented, flanged, etc. depending on the kind of pipe being joined.
Pipe joint compound
Compound which, when applied prior to joining, lubricates a pipe joint or seals the pipe threads when the pipe is joined.
Pipe laser
Laser beamed optical device which is used to align pipes by projecting the beam along the slope of pipe installation and beyond to some distant point. The pipe layer can keep a watch on the alignment of the piping by looking through the viewer to check if there is alignment with the light beam.
Pipe nipple
Short length of pipe with male threading on each end, used in places where one is needed.
Pipe plug
Male threaded plug, which seals the end of a run of pipe when fitted into a female threaded fitting. Plug has a slotted head or square head with wrench flats.
Pipe size
Size of pipe up to 12 inches, after which the pipe size (nps for nominal pipe size) is the outside diameter.
Pipe sleeve
Sleeve, constructed from a strong and durable material, which is passed through a wall, for the purpose of inserting other pipe through it and, therefore, through the wall.
Pipe street ell
Connector ell which has male threads on one end and female threads on the other so that it can connect a male end of pipe to a female end or can change direction without a joint.
Pipe supports
Any and all devices such as straps, clamps, etc. which are used to hold piping in place. Hangers support pipes from above while spring supports can be used either above or below. Riser clamps support the weight of vertical pipes, while roller supports permit the pipe to move axially. A necessary part of the piping system, they keep the pipes functional and intact in spite of any problems.
Pipe tee
Fitting which joins three pipe lengths at a single junction.
