Grooved pipes provide an economical and efficient method of joining pipe in mechanical building sevices.
The grooved piping system joins together two pipe ends by using a coupling that is seated in grooves at the end of each pipe. When the coupling is assembled, the coupling keys engage the grooves around the circumference of both pipes, providing a secure connection.
There are two types of grooving: roll grooving and cut grooving. Roll grooving uses a special machine that rotates the end of a pipe through a roll set, displacing the metal and forming a groove on the outside surface of the pipe. Roll grooving can be accomplished on carbon steel, stainless steel, copper, and aluminum.
Gasket Seating Surface must be free from score marks, ridges, indentations, projections, loose paint, scale, dirt chips, grease, and rust that would prevent a positive seal.
Groove Diameter must be uniform depth around the circumfer- ence of the pipe.
Maximum allowable pipe end flare diameter is measured at the pipe end diameter (roll grooved pipe only).