Third party inspector controls following points:

    To verify that the model and various features and components comply with the purchase order description and valve specification and drawings as applicable.

    To verify that the dimensions of Valves, flanges, flange drilling, bore, stem, threading, wall thickness and any other dimensions, as applicable, comply with the requirements of the specification and other.

    Witnessing required pressure tests.

    Witnessing functional test of actuator on valve, when actuators are specified.

    Radiographic examination and other NDE in accordance with the applicable references noted above.

If third party inspector is not in the hold or witness point for these stages, then will review valve manufacture quality control report in his/her coming visit or final inspection day.