API has a standard that is in draft or ballot form. I think it's API-664. It might not be in official circulation yet but I found it easily enough when I looked for it using Google. The copy I found was about 50 pages.
then API 664 is one of the very first hits. The ballot is watermarked as "Committee Use Only" but there is some good stuff in it and the data sheets seem to be particularly nicely done.
