I have a contractor who is trying to prove to me that he can use 4 times API 610 table 4 allowables in force-moment while appendix F equations he uses factor 2, and is trying to prove that this is allowed for centrifugal hot high pressure pumps according to the following statemnt:

5.5.5 Annex F gives methods of qualifying nozzle loads in excess of those in table 4.

Is that true and can he really go up to 4 time API values, according to this statement?

Appreciating your speedy feedback.
Thanks in advance