Repair, alteration, or relocation of the pipeline is performed. Temporary valve is closed and the line stop equipment is removed. Completion plug is installed on the tapping machine. Tapping machine is installed on the temporary tapping valve. Temporary tapping valve is opened and the completion plug is installed in the branch of the line stop fitting and locked into position.
Line stop equipment and temporary tapping valve are removed from the line stop fitting.
Blind flange is installed on the line stop fitting. The tapping fitting, however, is provided with a Close-Sure flange so the valve may be recovered upon completion of the procedure. In this case the tapping fitting is referred to as a line stop fitting. In addition to the hot tap equipment, the line stop machinery consists of a stopping head inserted into the pipeline by an actuator. After the stopping operation is complete and the line stop head is remove, the Close-Sure flange receives a completion plug to seal the branch of the line stop fitting which allows the temporary valve to be recovered.