Can I claim PDUs if I'm not credentialed with PMI?

If you are not credentialed or hold a CAPM and are NOT applying to get credentials, then no - PMI will not allow you to report PDUs.

If you are not credentialed with PMI but are applying to become credentialed and took the class to fulfill a PMI requirement, you will need to first apply at   http://www.pmi.org/Membership/Membership-Benefits-of-Membership.aspx and fill in course information under "Contact Hours" on the application.