Method of testing a nozzle connection

A nozzle testing method involves testing a nozzle connection via pressurized fluid. The nozzle is subjected to both circumferential and axial tension the magnitude of which is approximately equal to that achieved in a full system pressure test. The method isolates and pressure tests a nozzle in a vessel or pipe by using a device that is inserted from the outside of the nozzle to be tested, although for some applications a restraining head may be placed from the inside of the vessel. The test devices supporting the method are capable of reacting the axial pressure thrust force with a structural member or fluid pressure bearing on the external surface of a vessel or alternatively internal to the vessel or pipe bearing on the opposite wall of the pipe or vessel. The stresses applied to the nozzle neck and attaching weld are primary stresses due to the applied pressure.