Both inside of and outdoors in the API pipes shall be grouted with or with no placing rebar. Centrally reinforcing kind of sound threaded or regular rebar style (ref fig) may be used as rebar. API PIPE Devices are advised for compression piles to maintain their lateral steadiness. The https://lorenzodg5ki.bloggazza.com/31352421/a-simple-key-for-engieering-unveiled