I'm working with PMT representing the client and the pump has been already commissioned a year ago but has had problems.

A pump specialist made a report that proved that piping is overloading the nozzles, so we made a Caesar check on the files presented by contractor and found out that he did not present API610 report or even nozzle loads check.

When we challenged Contractor to present it he said he can go upto 4 API individual loads while comparing the moment resultants with only 2 API.

The pump vendor data sheet says the pump can go upto 2 API.

So, my question is can Contractor really use API610 Annex F and use 4 x API to compare individual loads?