The factory acceptance test (FAT) refers to the functional test that is performed by the vendor upon the completion of the manufacturing process to prove the equipment has the same specification and functionality that indicated in the datasheet, specification and purchase order.
Testing is usually witnessed by third-party inspectors and customer representatives (purchasers). The term of “factory acceptance test” is used by vendors rather than customers and is implied for electrical, rotating and skid mounted units. We never use this term for fixed equipment, such as pressure vessels, heat exchangers, etc.
Usually, the pump performance test, the net positive suction head test (NPSH test) and the mechanical operation test are completed in one visit and can be classified as a FAT test. Obviously, the pump casing inspection, impeller, rotor dynamic balance test are all completed before the FAT Test.
The routine test, winding resistance test, locked rotor test, temperature rise test, load test, etc. can be considered as an induction motor FAT test.
Several inspection visits will be made before the FAT test, usually 1 visit after the FAT test for the final inspection. In the final inspection, the equipment is subjected to the dimensional inspection, visual inspection (coating included), and document review.
For document review, the third party inspector shall check the “inspection and test plan” against the final book.
Any item that is marked “review” at the ITP should have an inspection report or test report on the “final book.” The manufacturer provides the FAT test procedure to the customer for approval. The inspector shall review the procedures and make sure the FAT test is done based on the approved version of the test procedure. After the test is completed, the manufacturer provides a FAT test report. The inspector is responsible for reviewing the test report and matching the measured value with the acceptance criteria specified in the approved procedure or data sheet.