For anyone interested, I have a copy of a technical summary comparing API610, ANSI B73.1M and ISO 5199 pumps. Also, API 610 8th Edition gave guidelines for the selection of nonAPI 610 compliant pumps (Section 1 - General, paragraph 1.1.4). No doubt the selection of API 610 pumps for all duties in refinery service would likely give an extremely robust pump, but in circumstances where a more lightly constructed pump, in relatively non-hazardous service would suffice, there are massive savings in cost and much reduced lead times for appropriate ANSI/ISO standard pumps
If still online after +10 years you posted your offering, please share a copy once more. Thanks a lot in advance. jlopezcavada@hotmail.com