Pipe clamp

A system for temporarily joining two pipe ends securely in a reversible manner, where the joined pipe will carry fluids or mixed fluids and solids under high pressure and volume. Two clamshell clamps each grip a pipe near its end where two pipes are to be joined and. The clamshell clamps have two mating bodies of semicircular cross-section, pivoting around a hinged edge, so that interlaced flanges on the bodies' other edges meet and between which mated flanges a conical pin is inserted to bias the mating clamp bodies together gripping the pipe inside the tubular enclosure formed by the mating clamp elements. The conical pins are connected so that if the pipes' ends are urged apart, the connected pins are urged between the clamps' flanges forcing the clamps' gripping faces together on the pipes. The clamps may have included gripping elements adjacent on its inner face.