Flexible Grooved Piping System Pipe Coupling

Flexible couplings for grooved piping systems are intended to accommodate controlled movement at the pipe joint. Pipe and fittings joined with a flexible coupling are allowed to expand, contract, or deflect from the center line within limits established by the coupling interface with the pipe. The type of pipe, wall thickness, pressure, hanging and laying requirements, as well as the type of groove selected all contribute to the amount of movement the pipe system can do. After the pipe ends are grooved, a rubber gasket that is deemed suitable for the system is stretched over the pipe ends. The coupling segments are then placed over the gasket, and the bolts and nuts are fastened, resulting in a restrained, and leak free joint. Couplings and fittings are cast from ductile iron, meeting ASTM A536 Grade 65-45-12 (tensile-yield-elongation) standards. These light duty flexible grooved couplings are suitable for fire protection services, water supply systems, and other process systems requiring a higher work pressure.