DCI has years of experience testing according to API, BS, ISO, etc....
Also, many project specific procedures are used for testing. If needed, DCI can assist in the development of project specific procedures.
In general, DCI advices to test under operational conditions. A random 10% test of a lot gives a much better indication than a type approval test several years ago. DCI can help to write test procedures that give quick insight into a valve's quality under certain conditions.