Third Party Inspection for Valve - Material Inspection
The original or authenticated copies of mill certificates of material normally are witnessed at the manufacturer's premises.
The third party inspector examines these certificates for compliance with specifications, and where appropriate, drawings.
The review includes checks on:
Heat or cast No.
Heat treated condition.
NDE applied and results.
This covers body stem material, shell material, trim materials, gland materials, anti-friction materials, ball, wedge or flap materials, operating components, support material, well end, flanges and any other specified component.
Then the inspector witnesses the materials identification on the certificates against the materials marking. It is also necessary to check these with the valve drawing datasheet, material list and other specifications as appropriate.
Visual inspection for surface finish and probable defects is done and dimensional compliance with specification need to be controlled, as well.
When third party inspector carries out the material inspection, then provides the inspection visit report (IVR), the report contains the following items:
Confirmation of satisfactory document review
Record of the endorsement of certification reviewed/witnessed