gmac:
I am not really an expert in API topics, but trying to give some help let me give you some opinion.
I have a client related to valves and is working in the monogram program that you mentioned. He has to comply with 2 main programs: API Spec. Q1 and API Spec 6D.
As far as I understand Q1 is a "selection" of ISO 9001, which includes 4.1,2,3,4,5,6,10,13,14 and finally 4.15, and probably those items are not fully followed as ISO 9001 establishes. They are using (at API) the 6th. edition of Q1.
The other spec (6D, is about the requirements to be fullfilled by any product using the "API monogram" and contains information about: types and class of valves, materials, Tests, identification, calibration, personnel qualification, records and storage/handling.
I'm trying to get the 6D standard to have the complete information.
I hope this information will give you some help.
QQQQQualiman