If I am not mistaken, the bookstore tab at this website should be able to help you out with purchases of electronic copies for many of the AWS codes and standards. You might need a current copy of Adobe to read them. I think each electronic copy may only be stored at one file location on one device and used by one user at a time (unless someone looks over your shoulder).
AWS recently began offering the Journals by email and in some of the common eReader formats; however, the welding codes might be a little more difficult to use in the field on electronic devices - a tablet device might be your best option - but, then, what about charging it?
You might also want to check into some of the large online document distributors like IHS Global (and others?); but, this option might only be cost effective for larger businesses that use many documents.
http://pubs.aws.org/t/Publications